Chronic pelvic pain

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]


Overview

Chronic pelvic pain is defined as persistent pelvic pain for longer than three to six months, and the diagnosis is often based on the history and physical and imaging and laboratory findings are often inconclusive in diagnosing it, and usually no specific etiology can be found. It is likely represents an abnormal neurological function and is a form of centralized pain, where the body develops a low threshold for pain, often a result of chronic pain. For example, the acute pain associated with endometriosis could become centralized ( Peripheral sensitization may lead to central sensitization) during a three to six months duration, as the pain becomes chronic. With central sensitization, the chemistry of sensory neurons in the central nervous system is altered, changing how pain signals are processed. As a result, neurons in the pain pathway in the central nervous system remain in a persistent state of high reactivity, resulting in heightened perceptions of pain. In centralized pain, the previous mild to moderate pain is experienced as severe pain (hyperalgesia), or tactile sensations can be interpreted as painful (allodynia). Also, chronic pelvic pain has a strong association with previous physical or emotional trauma, so the etiology of chronic pelvic pain could be related to functional somatic pain syndrome. Treatment of chronic pelvic pain is often complicated and is usually focused on the suspected etiology of the chronic pelvic pain, such as treating a comorbid mood disorder, neuropathy, or uterine dysfunction, which can exacerbate chronic pain.

Historical Perspective

  • [Disease name] was first discovered by [scientist name], a [nationality + occupation], in [year] during/following [event].
  • In [year], [gene] mutations were first identified in the pathogenesis of [disease name].
  • In [year], the first [discovery] was developed by [scientist] to treat/diagnose [disease name].

Classification

  • [Disease name] may be classified according to [classification method] into [number] subtypes/groups:
  • [group1]
  • [group2]
  • [group3]
  • Other variants of [disease name] include [disease subtype 1], [disease subtype 2], and [disease subtype 3].

Pathophysiology

  • The pathogenesis of chronic pelvic pain depends on the cause of pain. For example, the cyclical pain in endometriosis is due to recurrent bleeding in the endometriotic implants, or pain in pelvic congestion syndrome is due to engorged and dilated pelvic veins causing the decreased venous washout.[1]As one organ system becomes dysfunctional, such as in interstitial cystitis, another organ can also develop pathology, such as irritable bowel syndrome. As comorbidities develop, the chronic nature of symptoms leads to centralized pain, only enhancing pain. Collectively, persistent and increased sensitivity to pain becomes chronic pelvic pain.[2]

Causes

Chronic pelvic pain may be caused by comorbid conditions such as irritable bowel syndrome, interstitial cystitis, bladder pain syndrome, mental health disorders such as posttraumatic stress disorder and major depressive disorder, pelvic adhesions, endometriosis.

Common Causes

Commonly proposed etiologies include [3] [4]

  • Endometriosis (very controversial)[5] Deeply Infiltrative Endometriosis may be more important
  • Infection or post-infectious neurological hypersensitivity
  • Exaggerated bladder, bowel, or uterine pain sensitivity (also known as visceral pain)
  • Ovarian cysts, uterine leiomyoma - often found in asymptomatic patients as well, however
  • Less common emergencies: ovarian torsion - sudden loss of circulation to the ovary, appendicitis - infection of one part of the intestine, with right lower abdominal pain, ectopic pregnancy - where an early pregnancy grows outside of the uterus and can cause sudden, heavy intra-abdominal bleeding
  • Pelvic girdle pain (SPD or DSP)

Causes by Organ System

Cardiovascular Pelvic vein thrombosis
Chemical / poisoning No underlying causes
Dermatologic No underlying causes
Drug Side Effect No underlying causes
Ear Nose Throat No underlying causes
Endocrine No underlying causes
Environmental No underlying causes
Gastroenterologic Anal fissure, Appendicitis, Colitis, Colonic polyps, Constipation, Diarrhea, Diverticulitis, Gastrointestinal cancers, Hemorrhoids, Internal hernia, Irritable bowel syndrome, Proctitis, Reproductive tract cancers, Strangulated hernia, Ulcerative colitis
Genetic No underlying causes
Hematologic Porphyria
Iatrogenic Ovarian remnant
Infectious Disease UTI
Musculoskeletal / Ortho Coccydynia, Low back pain, Muscle spasm, Pelvic girdle malrotation, Tension in the pelvic floor muscles
Neurologic Nerve entrapment in pelvis, Peripheral neuropathy in pelvis, Post herpetic neuralgia, Post infectious neurological hypersensitivity, Pudendal nerve neuralgia
Nutritional / Metabolic No underlying causes
Obstetric/Gynecologic Adenomyosis, Adhesions in the pelvic area, Cervical polyps, Chronic vulvovaginitis, Dysmenorrhea, Ectopic pregnancy, Endometrial polyps, Endometriosis, Fibroids, Miscarriage, Mittelschmerz pain, Mullerian abnormalities, Ovarian cysts, Ovarian torsion, Pelvic congestion syndrome, Pelvic inflammatory disease, Pelvic relaxation, Placental abruption, Retroverted uterus, Uterine leiomyoma, Vulvodynia
Oncologic Colon cancer, Neuromas, Pelvic tumor, Testicular tumors
Opthalmologic No underlying causes
Overdose / Toxicity No underlying causes
Psychiatric Chronic stress, Depression
Pulmonary No underlying causes
Renal / Electrolyte Loin pain hematuria syndrome
Rheum / Immune / Allergy Fibromyalgia
Sexual Clitorodynia, Epididymo-orchitis, Sexual abuse
Trauma Physical abuse
Urologic Chronic bacterial prostatitis, Chronic bladder irritation, Chronic non bacterial prostatitis, Chronic pelvic pain syndrome, Chronic urethritis, Epididymal cysts, Hydrocele, Interstitial cystitis, Urinary tract calculi, Varicocele
Dental No underlying causes
Miscellaneous No underlying causes

Causes in Alphabetical Order

Differentiating [disease name] from other Diseases

[Disease name] must be differentiated from other diseases that cause [clinical feature 1], [clinical feature 2], and [clinical feature 3], such as:

  • [Differential dx1]
  • [Differential dx2]
  • [Differential dx3]

Epidemiology and Demographics

The prevalence of [disease name] is approximately [number or range] per 100,000 individuals worldwide. In [year], the incidence of [disease name] was estimated to be [number or range] cases per 100,000 individuals in [location].

Age

Patients of all age groups may develop [disease name]. [Disease name] is more commonly observed among patients aged [age range] years old. [Disease name] is more commonly observed among [elderly patients/young patients/children].

Gender

[Disease name] affects men and women equally. [Gender 1] are more commonly affected with [disease name] than [gender 2]. The [gender 1] to [Gender 2] ratio is approximately [number > 1] to 1.

Race

There is no racial predilection for [disease name]. [Disease name] usually affects individuals of the [race 1] race. [Race 2] individuals are less likely to develop [disease name].

Risk Factors

Common risk factors in the development of [disease name] are [risk factor 1], [risk factor 2], [risk factor 3], and [risk factor 4].

Natural History, Complications and Prognosis

  • The majority of patients with [disease name] remain asymptomatic for [duration/years].
  • Early clinical features include [manifestation 1], [manifestation 2], and [manifestation 3].
  • If left untreated, [#%] of patients with [disease name] may progress to develop [manifestation 1], [manifestation 2], and [manifestation 3].
  • Common complications of [disease name] include [complication 1], [complication 2], and [complication 3].
  • Prognosis is generally [excellent/good/poor], and the [1/5/10­year mortality/survival rate] of patients with [disease name] is approximately [#%].

Diagnosis

Diagnostic Criteria

The diagnosis of [disease name] is made when at least [number] of the following [number] diagnostic criteria are met: [criterion 1] [criterion 2] [criterion 3] [criterion 4] History and Symptoms [Disease name] is usually asymptomatic. Symptoms of [disease name] may include the following: [symptom 1] [symptom 2] [symptom 3] [symptom 4] [symptom 5] [symptom 6] Physical Examination Patients with [disease name] usually appear [general appearance]. Physical examination may be remarkable for: [finding 1] [finding 2] [finding 3] [finding 4] [finding 5] [finding 6]

Laboratory Findings

There are no specific laboratory findings associated with [disease name]. A [positive/negative] [test name] is diagnostic of [disease name]. An [elevated/reduced] concentration of [serum/blood/urinary/CSF/other] [lab test] is diagnostic of [disease name]. Other laboratory findings consistent with the diagnosis of [disease name] include [abnormal test 1], [abnormal test 2], and [abnormal test 3].

Electrocardiogram

There are no ECG findings associated with [disease name].

OR

An ECG may be helpful in the diagnosis of [disease name]. Findings on an ECG suggestive of/diagnostic of [disease name] include [finding 1], [finding 2], and [finding 3].

X-ray

There are no x-ray findings associated with [disease name].

OR

An x-ray may be helpful in the diagnosis of [disease name]. Findings on an x-ray suggestive of/diagnostic of [disease name] include [finding 1], [finding 2], and [finding 3].

OR

There are no x-ray findings associated with [disease name]. However, an x-ray may be helpful in the diagnosis of complications of [disease name], which include [complication 1], [complication 2], and [complication 3].

Echocardiography or Ultrasound

There are no echocardiography/ultrasound findings associated with [disease name].

OR

Echocardiography/ultrasound may be helpful in the diagnosis of [disease name]. Findings on an echocardiography/ultrasound suggestive of/diagnostic of [disease name] include [finding 1], [finding 2], and [finding 3].

OR

There are no echocardiography/ultrasound findings associated with [disease name]. However, an echocardiography/ultrasound may be helpful in the diagnosis of complications of [disease name], which include [complication 1], [complication 2], and [complication 3].

CT scan

There are no CT scan findings associated with [disease name].

OR

[Location] CT scan may be helpful in the diagnosis of [disease name]. Findings on CT scan suggestive of/diagnostic of [disease name] include [finding 1], [finding 2], and [finding 3].

OR

There are no CT scan findings associated with [disease name]. However, a CT scan may be helpful in the diagnosis of complications of [disease name], which include [complication 1], [complication 2], and [complication 3].

MRI

There are no MRI findings associated with [disease name].

OR

[Location] MRI may be helpful in the diagnosis of [disease name]. Findings on MRI suggestive of/diagnostic of [disease name] include [finding 1], [finding 2], and [finding 3].

OR

There are no MRI findings associated with [disease name]. However, a MRI may be helpful in the diagnosis of complications of [disease name], which include [complication 1], [complication 2], and [complication 3].

Other Imaging Findings

There are no other imaging findings associated with [disease name].

OR

[Imaging modality] may be helpful in the diagnosis of [disease name]. Findings on an [imaging modality] suggestive of/diagnostic of [disease name] include [finding 1], [finding 2], and [finding 3].

Other Diagnostic Studies

There are no other diagnostic studies associated with [disease name].

OR

[Diagnostic study] may be helpful in the diagnosis of [disease name]. Findings suggestive of/diagnostic of [disease name] include [finding 1], [finding 2], and [finding 3].

OR

Other diagnostic studies for [disease name] include [diagnostic study 1], which demonstrates [finding 1], [finding 2], and [finding 3], and [diagnostic study 2], which demonstrates [finding 1], [finding 2], and [finding 3].

Treatment

Medical Therapy

There is no treatment for [disease name]; the mainstay of therapy is supportive care. The mainstay of therapy for [disease name] is [medical therapy 1] and [medical therapy 2]. [Medical therapy 1] acts by [mechanism of action 1]. Response to [medical therapy 1] can be monitored with [test/physical finding/imaging] every [frequency/duration].

Surgery

Surgery is the mainstay of therapy for [disease name]. [Surgical procedure] in conjunction with [chemotherapy/radiation] is the most common approach to the treatment of [disease name]. [Surgical procedure] can only be performed for patients with [disease stage] [disease name].

Prevention

There are no primary preventive measures available for [disease name]. Effective measures for the primary prevention of [disease name] include [

References

  1. Smith, Blair H.; Fors, Egil A.; Korwisi, Beatrice; Barke, Antonia; Cameron, Paul; Colvin, Lesley; Richardson, Cara; Rief, Winfried; Treede, Rolf-Detlef (2019). "The IASP classification of chronic pain for ICD-11". PAIN. 160 (1): 83–87. doi:10.1097/j.pain.0000000000001360. ISSN 0304-3959.
  2. Dydyk AM, Gupta N. PMID 32119472 Check |pmid= value (help). Missing or empty |title= (help)
  3. Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:77 ISBN 1591032016
  4. Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:68 ISBN 140510368X
  5. Stout AL, Steege JF, Dodson WC, Hughes CL (1991). "Relationship of laparoscopic findings to self-report of pelvic pain". Am J Obstet Gynecol. 164 (1 Pt 1): 73–9. PMID 1824741.

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