Squamous cell carcinoma of the skin differential diagnosis: Difference between revisions

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* Appearance depends on stage of evolution
* Appearance depends on stage of evolution
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Squamous cell carcinoma of the mouth must be differentiated from other mouth lesions such as oral candidiasis and aphthous ulcer
<div style="width: 70%;">
<small><small>
{| class="wikitable"
!Disease
!Presentation
!Risk Factors
!Diagnosis
!Affected Organ Systems
!Important features
!Picture
|-
! colspan="3" |Diseases predominantly affecting the oral cavity
!
!
!
!
|-
|[[Oral candidiasis|Oral Candidiasis]]
|
* [[Dysphagia]] or [[odynophagia]]
* White patches on the mouth and tongue
|
*[[Newborn]] babies
*Denture users
*Poorly controlled [[diabetes]]
*As a side effect of medication, most commonly having taken [[antibiotic]]s. Inhaled [[corticosteroids]] for the treatment of lung conditions (e.g, [[asthma]] or [[COPD]]) may also result in oral candidiasis which may be reduced by regularly rinsing the mouth with water after taking the medication.
*People with poor [[nutrition]], specifically [[vitamin A]], [[Iron deficiency anemia|iron]] and [[Folate deficiency|folate deficiencies]].
*People with an [[immune deficiency]] (e.g. as a result of [[AIDS]]/[[HIV]] or [[chemotherapy]] treatment).
*Women undergoing hormonal changes, like [[pregnancy]] or those on [[birth control pills]].
*[[Organ transplantation]] patients
|
* Clinical diagnosis
* Confirmatory tests rarely needed
|'''Localized candidiasis'''
* [[Oral candidiasis|Oral]] and [[Esophageal candidiasis|esophageal candidasis]]
* [[Candida vulvovaginitis]]
* [[Chronic mucocutaneous candidiasis]]
'''Invasive candidasis'''
* [[Candidiasis|Candidaemia]]
* [[Endocarditis|Candida endocarditis]]
* [[Osteoarthritis|Candida osteoarticular disease]]
|
* [[Osteoarthritis|Oral candidiaisis is]] a benign self limiting disease unless accompanied by [[immunosuppression]].
|[[File:Human tongue infected with oral candidiasis--By James Heilman, MD - Own work, CC BY-SA 3.0, httpscommons.wikimedia.orgwindex.phpcurid=11717223.jpg|thumb|Tongue infected with oral candidiasis - By James Heilman, MD - Own work, CC BY-SA 3.0, httpscommons.wikimedia.orgwindex.phpcurid=11717223.jpg|400x400px]]
|-
|[[Herpes simplex|Herpes simplex oral lesions]]
|
* [[Fever]] 
* [[Sore throat]]
* Painful [[ulcer]]s
|
* Stress
* Recent [[URTI]]
* Female sex
|
* Physical examination
* [[Viral culture]]
* [[Tzanck smear]]
|
* Orofacial Infection
* [[Herpes simplex anogenital infection|Anogenital Infection]]
* [[Herpes simplex ocular infection|Ocular Infection]]
* [[Herpes simplex encephalitis|Herpes Encephalitis]]
* [[Herpes simplex neonatorum|Neonatal Herpes]]
* [[Herpetic whitlow|Herpetic Whitlow]]
* [[Herpes gladiatorum|Herpes Gladiatorum]]
|
* The symptoms of primary [[HSV]] infection generally resolve within two weeks
|[[File:Herpesinfection - By James Heilman, MD - Own work, CC BY-SA 3.0, httpscommons.wikimedia.orgwindex.phpcurid=19051042.jpg|thumb|Oral herpes simplex infection - By James Heilman, MD - Own work, CC BY-SA 3.0, httpscommons.wikimedia.orgwindex.phpcurid=19051042.jpg|400x400px]]
|-
|[[Aphthous ulcer|Aphthous ulcers]]
|
* Painful, red spot or bump that develops into an open [[ulcer]]
|
* Being a female
* Between the ages of 10-40
* Family history of [[Aphthous ulcer|aphthous ulcers]]
|
* Physical examination
* Diagnosis of exclusion
|
* Oral cavity
|
* Self-limiting , [[Pain]] decreases in 7 to 10 days, with complete healing in 1 to 3 weeks
|[[File:Afta foto - By Ebarruda - Own work, CC BY-SA 3.0, httpscommons.wikimedia.orgwindex.phpcurid=7903358.jpg|thumb|Apthous ulcer on the under surface of the tongue|By Ebarruda - Own work, CC BY-SA 3.0, httpscommons.wikimedia.orgwindex.phpcurid=7903358|400x400px]]
|-
|[[Squamous cell carcinoma]]
|
*Non healing [[ulcer]], [[nodule]], indurated plaque or mass
*May involve [[skin]], [[lips]], inside the [[mouth]], [[throat]] or [[esophagus]]
|
* Chronic sun or [[Ultraviolet|UV exposure]]
* Fair [[skin]]
* [[Elderly]] age (>45 yrs)
* [[Male sex]]
* [[Smoking]]
|
*[[Physical exam]]
*[[Biopsy]]
|
*[[Oral Cavity]]
**Floor of [[mouth]]
**Lateral [[tongue]]
*[[Throat]]
*[[Esophagus]]
|
*[[Malignant]]
*Can spread to [[TMJ]]
*Some times associated with [[leukoplakia]]
|[[File:PLoS oral cancer.png|thumb|400x400px|Squamous cell carcinoma - By Luca Pastore, Maria Luisa Fiorella, Raffaele Fiorella, Lorenzo Lo Muzio - http://www.plosmedicine.org/article/showImageLarge.action?uri=info%3Adoi%2F10.1371%2Fjournal.pmed.0050212.g001, CC BY 2.5, https://commons.wikimedia.org/w/index.php?curid=15252632]]
|-
|[[Leukoplakia]]
|
*White leathery spots on the [[mucous membranes]] of the [[tongue]] and inside of the [[mouth]]
*Lateral borders of [[tongue]]
|
*Atypical [[Tobacco]] use
*Chronic [[irritation]]
*[[Immunodeficiency]]
*[[Bloodroot]] ([[Sanguinarine|sanguinaria]])
|
*[[Physical exam]]
*Diagnosis of exclusion
*[[Biopsy]]
|
*[[Vulva|Vulvar]] lesions occur independent of oral lesions
|
*Associated with [[HIV]]
*Persistant white spots
*[[Benign]] but can progress to [[carcinoma]] after almost 10 years
*Oral proliferative [[Leukoplakia|verrucous leukoplakia]] is an aggressive sub type with multiple lesions and higher conversion to [[warts]] or [[carcinoma]]<ref>{{Cite journal
| author = [[Ann M. Gillenwater]], [[Nadarajah Vigneswaran]], [[Hanadi Fatani]], [[Pierre Saintigny]] & [[Adel K. El-Naggar]]
| title = Proliferative verrucous leukoplakia (PVL): a review of an elusive pathologic entity!
| journal = [[Advances in anatomic pathology]]
| volume = 20
| issue = 6
| pages = 416–423
| year = 2013
| month = November
| doi = 10.1097/PAP.0b013e3182a92df1
| pmid = 24113312
}}</ref>
|[[File:Oral hairy leukoplakia (EBV, in HIV)a.jpg|thumb|400x300px|Leukoplakia - By Aitor III - Own work, Public Domain, https://commons.wikimedia.org/w/index.php?curid=9873087]]
|-
|[[Melanoma]]
|
*A lesion with [[ABCD]]
**[[Asymmetry]]
**Border irregularity
**Color variation
**[[Diamete]]r changes
*[[Bleeding]] from the lesion
|
*[[Ultraviolet|UV radiations]]
*[[Genetic predisposition]]
*[[Old age]]
*[[Male gender]]
*Family or personal history of [[melanoma]]
*Multiple benign or atypical [[Nevus|nevi]]
|
*[[ABCD]] characteristics
*[[Bleeding]] or [[ulceration]] may show [[malignancy]]
*Serum [[LDH]] may be elevated in case of [[malignancy]]
*[[Biopsy]]
|
*Can [[metastasize]]
*All [[UV radiation]] or sun exposed areas can be effected independently
*1-2 to hundreds of [[granules]]
|
*[[Neural crest cell]] derivative
*Development begins with disruption of [[nevus]] growth control
*Progression involves [[MAPK/ERK pathway]]
*[[RAS|N-RAS]] or [[BRAF]] [[oncogene]] also involved
|[[File:Palate malign melanoma 01.jpg|thumb|400x400px|Oral melanoma - By Emmanouil K Symvoulakis, Dionysios E Kyrmizakis, Emmanouil I Drivas, Anastassios V Koutsopoulos, Stylianos G Malandrakis, Charalambos E Skoulakis and John G Bizakis - Symvoulakis et al. Head & Face Medicine 2006 2:7 doi:10.1186/1746-160X-2-7 (Open Access), [1], CC BY-SA 2.0, https://commons.wikimedia.org/w/index.php?curid=9839811]]
|-
|[[Fordyce spots]]
|
*Rice-like [[granules]] or [[spots]]
*Small, [[painless]], [[raised]], [[pale]], red or white
*1 to 3 mm in [[diameter]]
|
*Greasy skin types
*Some [[Rheumatic|rheumatic disorders]]
*[[Hereditary nonpolyposis colorectal cancer]]
**Lower [[gingiva]] (gums)
**[[Vestibular system|Vestibular mucosa]]
|
*[[Physical exam]]
*Small [[keratin]]-filled [[pseudocysts]]
*May be seen on [[incidental]] [[mucosal]] [[biopsy]]
**[[Biopsy]] not done for them primarily
|
*[[Oral cavity]]
**[[Vermillion border|Vermilion border]] of the lips
**[[Oral mucosa]] of the upper lip
*[[Buccal mucosa]] in the commissural region often bilaterally
*[[Genitals]]
|
*[[Benign neoplasms]] with [[sebaceous]] features
*Visible [[sebaceous glands]]
*No surrounding [[mucosal]] change
*Several adjacent [[glands]] may coalesce into a larger cauliflower-like cluster
|[[File:Fospot.jpg|thumb|400x400px|Fordyce spots - Por Perene - Obra do próprio, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=19772899]]
|-
|[[Burning mouth syndrome]]
|
*Burning or [[tingling]] on the [[lips]], [[tongue]], or entire [[mouth]]
|
*[[Nutritional deficiencies]]
*Chronic [[anxiety]] or [[depression]]
*[[Diabetes type 2]]
*[[Menopause]]
*[[Oral thrush]] or [[dry mouth]], or damaged [[nerves]] transmitting taste
*[[Female gender ]]
*[[Menopause]]
|
*[[Presentation]]
*[[Physical exam]]
|
*[[Oral cavity]]
|
*Pain typically is low in the morning and builds up over the day
*Low dosages of [[benzodiazepines]], [[tricyclic antidepressants]] or [[anticonvulsants]] may be effective
|
|-
|[[Torus palatinus]]
|
*Bony growth on midline of the [[hard palate]]
*[[Nodular]] mass covered with normal [[mucosa]]
|
*[[Genetic predisposition]]
**[[Autosomal dominant]]
|
*[[Physical exam]]
*Types
**[[Torus palatinus|Flat tori]]
**[[Torus palatinus|Spindle tori]]
**[[Torus palatinus|Nodular tori]]
**[[Torus palatinus|Lobular tori]]
|
*[[Hard palate]]
|
*More common in [[Asian]] and Inuit populations
*Twice more common in [[females]]
*Repeated [[trauma]] can cause [[bleeding]]
*[[Surgery]] may be required in symptomatic
|[[File:06-06-06palataltoria.jpg|thumb|Torus palatinus|400x400px|Torus palatinus - By Photo taken by dozenist, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=846591]]
|-
| colspan="4" |'''Diseases involving oral cavity and other organ systems'''
|
|
|
|-
|[[Behçet's disease|Behcet's disease]]
|
*Painful [[mouth sores]]
*[[Acne]] like skin lesions
*Headache, [[fever]], poor [[balance]], [[disorientation]]
*[[Abdominal pain]], [[diarrhea]] or [[bleeding]]
*[[Uveitis]]
*Joint [[swelling]] and joint [[pain]]
*Genital [[sores]] wit [[pain]] and [[scaring]]
*[[Aneurysms]]
|
*Over active [[immune system]]
|
*[[Physical examination]]
|
*[[Mouth]]
*[[Genitals]]
*[[GIT]]
*[[Eye]]
*[[Joints]]
*[[Skin]]
*[[Vascular system]]
*[[Brain]]
|
*[[Outbreaks]] of exaggerated [[inflammation]]
*Affects smaller [[blood vessels]]
|[[File:Behcets disease.jpg|thumb|400x400px|Behcet's disease - By Ahmet Altiner MD, Rajni Mandal MD - http://dermatology.cdlib.org/1611/articles/18_2009-10-20/2.jpg, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=17863021]]
|-
|[[Crohn's disease]]
|
*Chronic, episodic [[diarrhea]] or [[constipation]]
*[[Abdominal pain]]
*[[Vomiting]]
*[[Weight loss]] or [[weight gain]]
|
*[[Smoking]]
*[[Whites]] and [[European]] [[Jews]]
*[[Hormonal contraception]]
*Diets high in microparticles, sweet, fatty or refined foods
*Industrialized country
|
*Typical [[history]] and [[symptoms]]
*[[Skip lesions]] on [[biopsy]]
*[[Anti saccharomyces cerevisiae antibodies|Anti-Saccharomyces cerevisiae antibodies (ASCA)]]
*[[Anti-neutrophil cytoplasmic antibodies]] ([[ANCA]])
|
*[[Eyes]]
*[[Joints]]
*[[Skin]]
|
*May lead to
**[[Obstruction]]s
**[[Abscess]]es
**Free [[perforation]]
**[[Hemorrhage]]
|
|-
|[[Agranulocytosis]]
|
*[[Fever]] or [[chills]]
*Frequent [[infections]]
*Unusual [[redness]], [[pain]], or [[swelling]] around a wound
*Mouth [[ulcers]]
*[[Abdominal pain]]
*[[Burning sensation when urinating]]
*[[Sore throat]]
|
*[[Medications]]<ref name="PMID17142169">{{cite journal |author=Andrès E, Zimmer J, Affenberger S, Federici L, Alt M, Maloisel F. |title=Idiosyncratic drug-induced agranulocytosis: Update of an old disorder. |journal=Eur J Intern Med. |volume=17|issue=8 |pages=529-35 |year=2006|pmid 17142169|doi=|url=https://www.ncbi.nlm.nih.gov/pubmed/17142169}}</ref>
*[[List of chemotherapeutic agents#Cytotoxic Chemotherapy|Cytotoxic chemotherapy]]
*[[Hematological malignancy|Hematologic malignancies]]
*[[Autoimmune disorders]]
|
*[[Neutropenia]] <100 cells per micro litre
*[[Eosinopenia]]
*[[Basopenia]]
|
*[[Oral cavity]]
*[[Skin]]
*[[GIT]]
*[[Urinary system]]
*[[Conjunctiva]]
|
*[[Immunocompromised|Immunocompromization]]
*Types
**[[Drug-induced]]
**[[Malignant]]
**[[Autoimmune]]
|
|-
|[[Syphilis]]<ref>title="By Internet Archive Book Images [No restrictions], via Wikimedia Commons" href="https://commons.wikimedia.org/wiki/File:A_manual_of_syphilis_and_the_venereal_diseases%2C_(1900)_(14595882378).jpg"</ref>
|
*[[Chancre]]
*Regional [[lymphadenopathy]]
|
*[[Multiple sexual partners]]
*Illicit [[drug use]]
*[[Unprotected sex]]
*[[Homosexual men|Men who have sex with men]]
*Residence in highly prevalent areas
*[[Human Immunodeficiency Virus (HIV)|HIV]] infection
*Presence of other [[STI]]s
*Previous history of [[Sexually transmitted disease|STIs]]
*[[Intravenous drug use]]
|
*[[Darkfield microscope|Darkfield microscopy]]
*Non [[Treponema|treponemal]] tests like [[VDRL]] and [[RPR test]])
*[[Treponema|Treponemal]] tests[[FTA-ABS|FTA-ABS tests]], (TP-PA) assay, [[Enzyme linked immunosorbent assay (ELISA)|enzyme immunoassays]], and [[Chemiluminescence|chemiluminescence immunoassays]])
|
*[[Oral cavity]]
*[[Penis]]
*[[Cervix]]
*[[Labia]]
*[[Anal canal]]
*[[Rectum ]]
*[[CNS]]
*[[Cardiovascular|CVS]]
|
*[[Primary syphilis]]
**[[Chancre]]
*[[Secondary syphilis]]
**[[Condyloma latum|Condylomata lata]]
*[[Latent syphilis]]
**[[Asymptomatic]]
*[[Tertiary syphilis]]
**[[Gumma|Gummas]]
**[[Neurosyphilis]]
|[[File:Hutchinson teeth congenital syphilis PHIL 2385.rsh.jpg|thumb|400x400px|oral syphilis - By CDC/Susan Lindsley - http://phil.cdc.gov/phil_images/20021114/34/PHIL_2385_lores.jpg, Public Domain, https://commons.wikimedia.org/w/index.php?curid=2134349]]
|-
|[[Coxsackie virus]]
|
*[[Fever]]
*[[Sores]] in the [[mouth]]
*[[Rash]] with [[blisters]]
*[[Aches]]
|
*[[Pregnancy]]
*[[immunodeficiency]]
|
*[[History]] and [[Physical exam]]
*[[Swabbing|Throat swabs]]
*Swabs from the lesion
*[[Tzanck test]]
|
*[[Oral cavity]]
*[[Skin]]
|
*Symptomatic treatment
|[[File:Hand foot mouth disease 07a.jpg|thumb|400x400px|Hand-foot-and-mouth disease - adapted from atlasdermatologico.com<ref name="urlDermatology Atlas">{{cite web |url=http://www.atlasdermatologico.com.br/ |title=Dermatology Atlas |format= |work= |accessdate=}}</ref>]]
|-
|[[Chickenpox|Chicken pox]]
|
*[[Conjunctival]] symptoms
*[[Catarrhal]] symptoms
*Characteristic [[spots]] on the trunk appearing in two or three waves
*[[Itching]]
|
*[[Pregnancy]]
*[[Premature infants]] born to susceptible mothers
*All [[infants]] born at less than 28 weeks [[gestation]] or who weigh =1000 grams
*[[Immunocompromised]]
|
*[[History]] and [[physical exam]]
*[[PCR]] to detect [[VZV]] in [[skin lesions]] ([[vesicles]], [[scabs]], [[Maculopapular|maculopapular lesions]])
|
*[[Oral cavity]]
*[[Skin]]
|
*[[Sodium bicarbonate]] in baths or [[antihistamines]] for [[itching]]
*[[Paracetamol]] ([[acetaminophen]]) for [[fever]]
*[[Prednisolone]] is [[contraindicated]]
|[[File:Herpangina2016.jpg|thumb|400x400px|Chickenpox - By James Heilman, MD - Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=52872565]]
|-
|[[Measles]]
|
*[[Fever]]
*[[Rash]]
*[[Cough]]
*[[Coryza]] (runny nose)
*[[Conjunctivitis]] (pink eye)
*[[Malaise]]
*[[Koplick spots]] in mouth
|
*Unvaccinated individuals<ref name="pmid11135778">{{cite journal| author=Feikin DR, Lezotte DC, Hamman RF, Salmon DA, Chen RT, Hoffman RE| title=Individual and community risks of measles and pertussis associated with personal exemptions to immunization. | journal=JAMA | year= 2000 | volume= 284 | issue= 24 | pages= 3145-50 | pmid=11135778 | doi= | pmc= | url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=11135778  }} </ref><ref name="pmid9009400">{{cite journal| author=Ratnam S, West R, Gadag V, Williams B, Oates E| title=Immunity against measles in school-aged children: implications for measles revaccination strategies. | journal=Can J Public Health | year= 1996 | volume= 87 | issue= 6 | pages= 407-10 | pmid=9009400 | doi= | pmc= | url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=9009400  }} </ref>
*Crowded and/or unsanitary conditions
*Traveling to less developed and developing countries
*Immunocompromized
*Winter and [[spring]] seasons
*Born after 1956 and never fully vaccinated
*Health care workers
|
*[[History]] and [[examination]]
*[[PCR]] for [[Measles]]-specific [[IgM|IgM antibody]]
*[[PCR]] for [[Measles]] [[RNA]]
|
*[[Oral cavity]]
*[[Skin]]
*[[Respiratory tract]]
*[[Eyes]]
*[[Throat]]
|
*Caused by [[Morbillivirus]]
*Primary site of infection is the [[respiratory epithelium]] of the [[nasopharynx]]
*Transmitted in [[respiratory secretions]], via [[aerosol droplets]] containing [[Virus|virus particles]]
|[[File:Koplik spots, measles 6111 lores.jpg|thumb|400x400px|Koplick spots (Measles) - By CDC - http://phil.cdc.gov/PHIL_Images/20040908/4f54ee8f0e5f49f58aaa30c1bc6413ba/6111_lores.jpg, Public Domain, https://commons.wikimedia.org/w/index.php?curid=824483]]
|}</small></small>
</div>


==References==
==References==
{{reflist|2}}
{{reflist|2}}

Revision as of 23:29, 3 June 2019

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Aditya Govindavarjhulla, M.B.B.S. [2], Raviteja Guddeti, M.B.B.S. [3]

Overview

Squamous cell carcinoma should be differentiated from melanoma and basal cell carcinoma. It accounts for 20% of all non-melanomatous tumors, and is fairly invasive contrary to its counterpart, basal cell carcinoma. Squamous cell carcinoma typically presents as a non-healing ulcer or growth on a sun exposed area of the skin.

Differentiating Squamous cell carcinoma from other Diseases

A few conditions that mimic Squamous cell carcinoma of the skin include the following:

Diseases Skin examination Diagnosis Additional findings
Type Color Texture Size Distribution Dermoscopic Findings Histopathology
Cutaneous squamous cell carcinoma[1] SCC in situ (Bowen's disease)
  • Scaly
  • Variable
  • Fair-skinned individuals: sun-exposed areas
  • Presence of dotted and/or glomerular vessels
  • White to yellowish surface scales
  • Red-yellowish background
  • Slow growth over the years
Invasive squamous cell carcinoma
  • Skin colored
  • 0.5 to 1.5 cm
  • Fair-skinned individuals: sun-exposed areas
  • In black individuals: legs, anus, and areas of chronic inflammation
  • White circles
  • White structureless areas
  • Masses of keratin
  • Hairpin and linear-irregular vessels
Keratoacanthoma[2]
  • Macule
  • Papule
  • May have telangiectasias
  • Skin-colored
  • Mildly erythematous
  • Prominent keratinous core in the center of the nodule
  • 1 to 2.5 cm
  • Sun-exposed areas
  • Face, neck, hands, and arms
  • White circles
  • Keratin
  • Blood spots
  • White structureless zones
  • Dermal inflammatory infiltrate
  • Rapid growth (within weeks)
Merkel cell carcinoma[3]
  • Shiny
  • Flesh-colored or bluish-red
  • Firm
  • < 1 cm
  • Sun-exposed areas
  • Milky red areas
  • Linear
  • Irregular vessels
  • Polymorphous vessels
  • Older individuals with light skin tones
  • Rapidly growing
Basal cell carcinoma[4] Nodular basal cell carcinoma
  • Flesh-colored
  • Small bump
  • Variable
  • Focused, bright red, and branching arborizing vessels
  • Loosely arranged blue-gray dots
  • Nest-like infiltration with basaloid cells
  • May have a "rolled" border
Superficial basal cell carcinoma
  • Patch
  • Scaly
  • 1 to > 10 cm
  • Sun-exposed areas
  • Head (cheek and nose)
  • Trunk
  • Superficial fine telangiectasia
  • Shiny white to red, translucent or opaque structureless areas
  • Multiple small erosions
  • Large, hyperchromatic, oval nuclei
  • Minimal cytoplasm
  • Small basaloid nodules
Sclerosing basal cell carcinoma (morpheaform)[5]
  • Papule
  • Plaque
  • Variable
  • Sun-exposed areas
Prurigo nodules[6][7]
  • Firm
  • Few millimeters to several centimeters
  • Extensor surfaces of the arms and legs and on the trunk
  • Upper back, abdomen, and sacrum
  • White "starburst pattern" surrounding red/brown/yellow crusts
  • Erosions
  • Hyperkeratosis
  • Thick and compact orthohyperkeratosis
  • Irregular epidermal hyperplasia
  • Focal parakeratosis with irregular acanthosis
  • Nonspecific dermal infiltrate containing WBCs
  • Nodules range in number from few to hundreds
  • Worsened by heat, sweating, or irritation from clothing
Melanoma[8] Melanoma in situ (Lentigo Maligna)[9]
  • Variable (from light to dark brown, black, pink, red, or white)
  • Smooth
  • Around 1 cm
  • Sun-damaged skin of the head or neck
  • Asymmetric, pigmented follicular openings
  • Gray angulated lines
  • Gray areas, dots, and globules
  • Circle within a circle
  • Darkening of pigmentation, sharpening of borders, or emergence of nodular areas are signs of progression to lentigo maligna melanoma
Lentigo maligna melanoma[10]
  • Brown/tan
  • Freckle-like
  • Variable
  • Chronically sun-damaged areas
  • Asymmetric, pigmented follicular openings
  • Gray angulated lines
  • Gray areas, dots, and globules
  • Circle within a circle
  • Usually in older individuals
Superficial spreading melanoma[11]
  • Macule
  • Plaque with irregular borders
  • Variably pigmented (red, blue, black, gray, and white)
  • Thin
  • 1 mm to > 1 cm
  • Anywhere but usually:
    • Back (men and women)
    • Lower extremities (women)
  • Asymmetry of shape
  • > 2 colors
  • Asymmetry of structures
  • Asymmetric
  • Poorly circumscribed
  • Lack cellular maturation
  • Lateral (radial) growth before vertical (invasive) growth
Nodular melanoma[12][13]
  • Dark color
  • Lump
  • 6mm to > 1 cm
  • Trunk
  • Head
  • Neck
  • Pigment network or pseudonetwork
  • Aggregated brown or black globules
  • Blue pigmentation within lesion
  • Small dotted or comma vessels
  • Dermal growth in isolation or in association with an epidermal component
  • Two-thirds arise in normal skin, the rest in existing moles
  • Rapidly enlarging
Acral lentiginous melanoma[14]
  • Dark brown to black
  • Variable
  • Palmar
  • Plantar
  • Subungual
  • Mucosal surfaces
  • Parallel-ridge pattern
  • Irregular diffuse pigmentation
  • Asymmetric proliferation of single melanocytes at dermoepidermal junction
  • Most common among dark skinned individuals
Amelanotic melanoma[15]
  • Patch
  • Skin color
  • Slightly elevated borders
  • Around 6 mm
  • Sun-exposed areas
  • Dotted vessels
  • Linear irregular vessels
Common nevus[16][17]
  • Smooth surface
  • Terminal hairs often present
  • 1 cm to > 20 cm
  • Sun-exposed areas above the waist
  • Comma-shaped or curved vessels
  • Structureless light brown background
  • Residual brown thick circles around the hair follicles
  • Also called Miescher nevus
Blue nevus[18]
  • Blue
  • Smooth
  • Variable
  • Head and neck,
  • Dorsal aspect of the distal extremities
  • Sacral area
  • Structureless blue pigmentation
  • Structureless blue and white or blue and brown on some occasions
  • Proliferation of dendritic, dermal, melanin-producing melanocytes
  • Also called Mongolian spots
Spitz nevus[19][20] Nonpigmented Spitz nevus
  • Pink
  • Smooth
  • < 1 cm
  • Cheek
  • Coiled vessels
  • White network over a pink to reddish background
  • In children and adolescents
Reed-like Spitz[21]
  • Papule
  • Smooth
  • < 1 cm
  • Head and neck
  • Upper and lower extremities
  • Enlarged spindle melanocytes with polyangular form
  • "Ground glass" cytoplasm
  • Most commonly develops in children, adolescents, and young adults.
Solar lentigo[22]
  • Multiple spots
  • Brown
  • Smooth
  • Around 5mm
  • Sun-exposed areas
  • Faint pigmented fingerprint structures
  • Structureless pattern
  • Light brown pseudonetwork with well-defined borders and a "moth-eaten" edge
  • Associated with UV exposure and skin aging
Sebaceous hyperplasia[23]
  • Skin-colored to brownish
  • Umbilicated
  • 2 - 6 mm
  • Structureless yellow to whitish center surrounded by short linear "crown vessels"
  • Usually in middle-aged or older patients
Lichen planus-like keratosis[24]
  • Gray to brown
  • Prominent
  • Variable
  • Appearance depends on stage of evolution

References

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  2. Kwiek B, Schwartz RA (2016). "Keratoacanthoma (KA): An update and review". J Am Acad Dermatol. 74 (6): 1220–33. doi:10.1016/j.jaad.2015.11.033. PMID 26853179.
  3. Albores-Saavedra J, Batich K, Chable-Montero F, Sagy N, Schwartz AM, Henson DE (2010). "Merkel cell carcinoma demographics, morphology, and survival based on 3870 cases: a population based study". J Cutan Pathol. 37 (1): 20–7. doi:10.1111/j.1600-0560.2009.01370.x. PMID 19638070.
  4. Wolberink EA, Pasch MC, Zeiler M, van Erp PE, Gerritsen MJ (2013). "High discordance between punch biopsy and excision in establishing basal cell carcinoma subtype: analysis of 500 cases". J Eur Acad Dermatol Venereol. 27 (8): 985–9. doi:10.1111/j.1468-3083.2012.04628.x. PMID 22759209.
  5. Wrone DA, Swetter SM, Egbert BM, Smoller BR, Khavari PA (1996). "Increased proportion of aggressive-growth basal cell carcinoma in the Veterans Affairs population of Palo Alto, California". J Am Acad Dermatol. 35 (6): 907–10. PMID 8959949.
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  7. Weigelt N, Metze D, Ständer S (2010). "Prurigo nodularis: systematic analysis of 58 histological criteria in 136 patients". J Cutan Pathol. 37 (5): 578–86. doi:10.1111/j.1600-0560.2009.01484.x. PMID 20002240.
  8. Witt C, Krengel S (2010). "Clinical and epidemiological aspects of subtypes of melanocytic nevi (Flat nevi, Miescher nevi, Unna nevi)". Dermatol Online J. 16 (1): 1. PMID 20137743.
  9. Connolly KL, Giordano C, Dusza S, Busam KJ, Nehal K (2019). "Follicular involvement is frequent in lentigo maligna: Implications for treatment". J Am Acad Dermatol. 80 (2): 532–537. doi:10.1016/j.jaad.2018.07.071. PMC 6333487. PMID 30266559.
  10. Connolly KL, Giordano C, Dusza S, Busam KJ, Nehal K (2019). "Follicular involvement is frequent in lentigo maligna: Implications for treatment". J Am Acad Dermatol. 80 (2): 532–537. doi:10.1016/j.jaad.2018.07.071. PMC 6333487. PMID 30266559.
  11. Argenziano G, Ferrara G, Francione S, Di Nola K, Martino A, Zalaudek I (2009). "Dermoscopy--the ultimate tool for melanoma diagnosis". Semin Cutan Med Surg. 28 (3): 142–8. doi:10.1016/j.sder.2009.06.001. PMID 19782937.
  12. Argenziano G, Soyer HP, Chimenti S, Talamini R, Corona R, Sera F; et al. (2003). "Dermoscopy of pigmented skin lesions: results of a consensus meeting via the Internet". J Am Acad Dermatol. 48 (5): 679–93. doi:10.1067/mjd.2003.281. PMID 12734496.
  13. Menzies, Scott W.; Moloney, Fergal J.; Byth, Karen; Avramidis, Michelle; Argenziano, Giuseppe; Zalaudek, Iris; Braun, Ralph P.; Malvehy, Josep; Puig, Susana; Rabinovitz, Harold S.; Oliviero, Margaret; Cabo, Horacio; Bono, Riccardo; Pizzichetta, Maria A.; Claeson, Magdalena; Gaffney, Daniel C.; Soyer, H. Peter; Stanganelli, Ignazio; Scolyer, Richard A.; Guitera, Pascale; Kelly, John; McCurdy, Olivia; Llambrich, Alex; Marghoob, Ashfaq A.; Zaballos, Pedro; Kirchesch, Herbert M.; Piccolo, Domenico; Bowling, Jonathan; Thomas, Luc; Terstappen, Karin; Tanaka, Masaru; Pellacani, Giovanni; Pagnanelli, Gianluca; Ghigliotti, Giovanni; Ortega, Blanca Carlos; Crafter, Greg; Ortiz, Ana María Perusquía; Tromme, Isabelle; Karaarslan, Isil Kilinc; Ozdemir, Fezal; Tam, Anthony; Landi, Christian; Norton, Peter; Kaçar, Nida; Rudnicka, Lidia; Slowinska, Monika; Simionescu, Olga; Di Stefani, Alessandro; Coates, Elliot; Kreusch, Juergen (2013). "Dermoscopic Evaluation of Nodular Melanoma". JAMA Dermatology. 149 (6): 699. doi:10.1001/jamadermatol.2013.2466. ISSN 2168-6068.
  14. Phan A, Dalle S, Touzet S, Ronger-Savlé S, Balme B, Thomas L (2010). "Dermoscopic features of acral lentiginous melanoma in a large series of 110 cases in a white population". Br J Dermatol. 162 (4): 765–71. doi:10.1111/j.1365-2133.2009.09594.x. PMID 19922528.
  15. Steglich RB, Meotti CD, Ferreira MS, Lovatto L, de Carvalho AV, de Castro CG (2012). "Dermoscopic clues in the diagnosis of amelanotic and hypomelanotic malignant melanoma". An Bras Dermatol. 87 (6): 920–3. PMC 3699915. PMID 23197217.
  16. Witt C, Krengel S (2010). "Clinical and epidemiological aspects of subtypes of melanocytic nevi (Flat nevi, Miescher nevi, Unna nevi)". Dermatol Online J. 16 (1): 1. PMID 20137743.
  17. Bauer J, Garbe C (2003). "Acquired melanocytic nevi as risk factor for melanoma development. A comprehensive review of epidemiological data". Pigment Cell Res. 16 (3): 297–306. PMID 12753404.
  18. Granter SR, McKee PH, Calonje E, Mihm MC, Busam K (2001). "Melanoma associated with blue nevus and melanoma mimicking cellular blue nevus: a clinicopathologic study of 10 cases on the spectrum of so-called 'malignant blue nevus'". Am J Surg Pathol. 25 (3): 316–23. PMID 11224601.
  19. Luo S, Sepehr A, Tsao H (2011). "Spitz nevi and other Spitzoid lesions part I. Background and diagnoses". J Am Acad Dermatol. 65 (6): 1073–84. doi:10.1016/j.jaad.2011.04.040. PMC 3217183. PMID 22082838.
  20. Argenziano G, Agozzino M, Bonifazi E, Broganelli P, Brunetti B, Ferrara G; et al. (2011). "Natural evolution of Spitz nevi". Dermatology. 222 (3): 256–60. doi:10.1159/000326109. PMID 21494025.
  21. Pedrosa AF, Lopes JM, Azevedo F, Mota A (2016). "Spitz/Reed nevi: a review of clinical-dermatoscopic and histological correlation". Dermatol Pract Concept. 6 (2): 37–41. doi:10.5826/dpc.0602a07. PMC 4866625. PMID 27222770.
  22. Tanaka M, Sawada M, Kobayashi K (2011). "Key points in dermoscopic differentiation between lentigo maligna and solar lentigo". J Dermatol. 38 (1): 53–8. doi:10.1111/j.1346-8138.2010.01132.x. PMID 21175756.
  23. Sato T, Tanaka M (2014). "Linear sebaceous hyperplasia on the chest". Dermatol Pract Concept. 4 (1): 93–5. doi:10.5826/dpc.0401a16. PMC 3919849. PMID 24520522.
  24. Morgan MB, Stevens GL, Switlyk S (2005). "Benign lichenoid keratosis: a clinical and pathologic reappraisal of 1040 cases". Am J Dermatopathol. 27 (5): 387–92. PMID 16148406.