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- Ddx:Growth Hormone
- Ddx:Gynecomastia
- Ddx:HCG
- Ddx:HDL Cholesterol
- Ddx:HLA-B27
- Ddx:Halitosis
- Ddx:Hallucinations
- Ddx:Hand Contracture
- Ddx:Hand and Foot Rashes
- Ddx:Haptoglobin
- Ddx:Headache
- Ddx:Hearing Loss
- Ddx:Heartburn
- Ddx:Hemarthrosis
- Ddx:Hematocrit
- Ddx:Hematuria
- Ddx:Hemiparesis and Hemiplegia
- Ddx:Hemoglobin
- Ddx:Hemopexin
- Ddx:Hemoptysis
- Ddx:Hemorrhagic Diathesis
- Ddx:Hemorrhoids
- Ddx:Hepatic Cysts
- Ddx:Hepatomegaly
- Ddx:Hepatosplenomegaly
- Ddx:Heterophoria
- Ddx:Hiccup
- Ddx:Hirsutism
- Ddx:Hoarseness
- Ddx:Horner's Syndrome
- Ddx:Human Chorionic Gonadotropin
- Ddx:Hydrocephalus
- Ddx:Hyperaldosteronism
- Ddx:Hypercalcemia
- Ddx:Hyperchloremia
- Ddx:Hypercholesterolemia
- Ddx:Hyperglycemia
- Ddx:Hypergonadism
- Ddx:Hyperhidrosis
- Ddx:Hyperkalemia
- Ddx:Hypernatremia
- Ddx:Hyperparathyroidism
- Ddx:Hyperpigmentation
- Ddx:Hyperreflexia
- Ddx:Hypersomnia
- Ddx:Hypertension
- Ddx:Hyperthermia
- Ddx:Hyperthyroidism
- Ddx:Hypertrophic Gums
- Ddx:Hypertrophy of the Heart
- Ddx:Hyperventilation
- Ddx:Hypesthesia
- Ddx:Hypocalcemia
- Ddx:Hypocholermia
- Ddx:Hypoglycemia
- Ddx:Hypokalemia
- Ddx:Hypomelanosis
- Ddx:Hyponatremia
- Ddx:Hypopigmentation
- Ddx:Hyporeflexia
- Ddx:Hypotension
- Ddx:Hypothermia
- Ddx:Hypothyroidism
- Ddx:Hypovolemia
- Ddx:ICP
- Ddx:Ileus
- Ddx:Impaired Wound Healing
- Ddx:Impotence
- Ddx:Inappetence
- Ddx:Incontinence
- Ddx:Increased Bowel Sounds
- Ddx:Increased Intracranial Pressure
- Ddx:Infertility
- Ddx:Insomnia
- Ddx:Intracranial Bleeding
- Ddx:Intracranial Calcification
- Ddx:Intraocular Pressure
- Ddx:Intrauterine Growth Retardation
- Ddx:Iron
- Ddx:Irregular Heart Rhythms
- Ddx:Janeway Lesions
- Ddx:Jaundice
- Ddx:Jaw Pain/Swelling
- Ddx:Joint Hypermobility
- Ddx:Jugular Venous Distension
- Ddx:Jugular Venous Distention
- Ddx:Karnofsky Performance Scale
- Ddx:Knee Pain/Swelling
- Ddx:LAP
- Ddx:LDH
- Ddx:LDL Cholesterol
- Ddx:Lactate Dehydrogenase
- Ddx:Lactate in the Liquor
- Ddx:Lactic Acidosis
- Ddx:Leg Cramps
- Ddx:Leg Length Discrepancy
- Ddx:Leg Pain
- Ddx:Leg Swelling
- Ddx:Leg Ulcer
- Ddx:Leukocyte Alkaline Phosphatase
- Ddx:Leukocytosis
- Ddx:Leukocyturia
- Ddx:Leukopenia
- Ddx:Lightheadedness and Vertigo
- Ddx:Lipase
- Ddx:Lipoprotein (a)
- Ddx:Liver Diseases
- Ddx:Localized Lymph Node Enlargement
- Ddx:Low Back Pain/Swelling
- Ddx:Lower Quadrant Abdominal Pain
- Ddx:Lung Disease
- Ddx:Lymph Node Metastases
- Ddx:Lymphadenopathy
- Ddx:Lymphedema
- Ddx:Lymphocytopenia
- Ddx:Lymphocytosis
- Ddx:Magnesium
- Ddx:Malassimilation
- Ddx:Mediastinal Mass
- Ddx:Meningismus
- Ddx:Meningitis
- Ddx:Mental Disorders
- Ddx:Mental Retardation
- Ddx:Mesenteric Ischemia
- Ddx:Metabolic Encephalopathy
- Ddx:Miosis
- Ddx:Mitral Regurgitation
- Ddx:Mitral Stenosis
- Ddx:Mitral Valve Prolapse
- Ddx:Monocytosis
- Ddx:Mucosa Hemorrhage
- Ddx:Murmurs
- Ddx:Muscle Weakness
- Ddx:Muscular Atrophy of the Hand
- Ddx:Myalgia
- Ddx:Mydriasis
- Ddx:Myocarditis
- Ddx:Myoglobin
- Ddx:Myopathy
- Ddx:Nail Changes
- Ddx:Nail Disorders
- Ddx:Narcolepsy
- Ddx:Nasal Congestion
- Ddx:Nausea and Vomiting
- Ddx:Neck Masses
- Ddx:Neck Stiffness/Pain
- Ddx:Nephrolithiasis
- Ddx:Neuron-Specific Enolase (NSE)
- Ddx:Night Blindness
- Ddx:Night Sweats
- Ddx:Nocturia
- Ddx:Nodular Lesions
- Ddx:Nystagmus
- Ddx:Obesity
- Ddx:Obstructive Lung Disease
- Ddx:Occult Blood
- Ddx:Oligospermia
- Ddx:Opthalmoplegia
- Ddx:Optic Neuropathy
- Ddx:Oral Lesions
- Ddx:Orthopnea
- Ddx:Osler Nodes
- Ddx:Osteolysis
- Ddx:Osteomalacia
- Ddx:Osteomyelitis
- Ddx:Osteoporosis
- Ddx:Otorrhea
- Ddx:Overeating
- Ddx:PVC
- Ddx:Pacreatic Insufficiency
- Ddx:Pallor
- Ddx:Palpitations
- Ddx:Pancreatic Polypeptide
- Ddx:Pancytopenia
- Ddx:Papilledema
- Ddx:Papulosquamous Lesions
- Ddx:Paradoxical Pulse
- Ddx:Paraneoplastic Syndromes
- Ddx:Paraplegia
- Ddx:Paraproteinemia
- Ddx:Parathyroid Hormone
- Ddx:Paresthesias
- Ddx:Parkinsonism
- Ddx:Parosmia
- Ddx:Paroxysmal Cold Hemoglobinuria
- Ddx:Paroxysmal Nocturnal Dyspnea
- Ddx:Partial Thromboplastin Time
- Ddx:Partoid Gland Enlargement
- Ddx:Pelvic Inflammatory Disease
- Ddx:Pelvic Masses
- Ddx:Pelvic Pain
- Ddx:Penile Discharge
- Ddx:Percussion of the Lungs
- Ddx:Pericardial Effusion
- Ddx:Pericardial Rubs
- Ddx:Pericarditis
- Ddx:Periorbital Edema
- Ddx:Peripheral Arterial Occlusive Disease
- Ddx:Peripheral Edema
- Ddx:Peripheral Neuropathy
- Ddx:Phosphate
- Ddx:Photophobia
- Ddx:Photosensitivity
- Ddx:Pigmented Lesions
- Ddx:Pituitary Insufficiency
- Ddx:Plasminogen
- Ddx:Pleural Effusion
- Ddx:Pleural Rubs
- Ddx:Pneumothorax
- Ddx:Pollakisuria
- Ddx:Polycythemia
- Ddx:Polydipsia
- Ddx:Polymenorrhea
- Ddx:Polyuria
- Ddx:Portal Hypertension
- Ddx:Postpartum Hemorrhage
- Ddx:Postpartum Infections
- Ddx:Precocious Puberty
- Ddx:Premature Ventricular Contractions
- Ddx:Priapism
- Ddx:Productive cough
- Ddx:Prolactin
- Ddx:Proptosis/Exophthalmos
- Ddx:Protein
- Ddx:Protein-Losing Enteropathy
- Ddx:Proteinuria
- Ddx:Pruritis
- Ddx:Ptosis
- Ddx:Pubertal Delay
- Ddx:Pulmonary Edema
- Ddx:Pulmonary Embolism
- Ddx:Pulmonary Hypertension
- Ddx:Pulmonary Nodule
- Ddx:Pulse Pressure
- Ddx:Pupillary Constriction
- Ddx:Pupillary Dilation
- Ddx:Purpura
- Ddx:Pyridoxine Deficiency
- Ddx:Pyuria
- Ddx:Rales/Crackles
- Ddx:Rash with Fever
- Ddx:Raynaud's Phenomenon
- Ddx:Rectal Masses
- Ddx:Rectal Pain
- Ddx:Red Eye
- Ddx:Red Face
- Ddx:Red Palms
- Ddx:Red Tongue
- Ddx:Reentry Supraventricular Tachycardias
- Ddx:Reflexes
- Ddx:Renal Cysts
- Ddx:Renal Failure
- Ddx:Respiratory Displacement, Reduced
- Ddx:Respiratory Failure
- Ddx:Respiratory Sounds
- Ddx:Restless Legs
- Ddx:Restrictive Lung Disease
- Ddx:Reticulocytes
- Ddx:Retinol
- Ddx:Reversible Renal Failure
- Ddx:Rhabdomyolysis
- Ddx:Rheumatoid Factor
- Ddx:Right Bundle-Branch Block
- Ddx:SA Block
- Ddx:Salivary Gland Enlargement
- Ddx:Salivary Gland Tumor
- Ddx:Scalp Rash
- Ddx:Sciatica
- Ddx:Scoliosis
- Ddx:Scrotal Masses
- Ddx:Scrotal Swelling
- Ddx:Seizures
- Ddx:Selenium
- Ddx:Sexually Transmitted Diseases
- Ddx:Shock
- Ddx:Shoulder Pain
- Ddx:Sicca Syndrome
- Ddx:Single Strand DNA Antibody
- Ddx:Sinoatrial Block
- Ddx:Sinus Bradycardia, Bradyarrhythmia
- Ddx:Sinus Tachycardia
- Ddx:Skin Changes
- Ddx:Skin Crepitation
- Ddx:Skin Pigmentation (Decreased)
- Ddx:Smell Loss
- Ddx:Smooth Muscle Antibody
- Ddx:Snoring
- Ddx:Sodium
- Ddx:Sore Throat
- Ddx:Splenomegaly
- Ddx:Sputum
- Ddx:Stomatitis
- Ddx:Striae Distensae
- Ddx:Stridor
- Ddx:Subarachnoid Hemorrhage
- Ddx:Sudden Death
- Ddx:Superior Vena Cava Syndrome
- Ddx:Supraventricular Tachycardias
- Ddx:Swollen Face
- Ddx:Syncope
- Ddx:Syndrome of Inappropriate Antidiuretic Hormone (SIADH)
- Ddx:TBG
- Ddx:TSH
- Ddx:Tachycardia
- Ddx:Tachycardic Cardiac Dysrhythmias
- Ddx:Tachypnea
- Ddx:Tactile Fremitus
- Ddx:Telangiectasia
- Ddx:Testicular Pain
- Ddx:Testosterone
- Ddx:Tetany
- Ddx:Thrombophilia
- Ddx:Tinnitus
- Ddx:Toe Pain/Swelling
- Ddx:Tongue Pain
- Ddx:Tongue Swelling
- Ddx:Tooth Loss
- Ddx:Toothache
- Ddx:Torsades des Pointes
- Ddx:Tremor
- Ddx:Tricuspid Insufficiency
- Ddx:Trigeminal Neuralgia
- Ddx:Tubulointerstitial Diseases of the Kidney
- Ddx:Unequal Pulses
- Ddx:Urinary Incontinence
- Ddx:Urinary Stream (Decrease)
- Ddx:Urinary Tract Obstruction
- Ddx:Urine Catecholamines
- Ddx:Urine calcium
- Ddx:Urine pH
- Ddx:Urobilinogen
- Ddx:Urolithiasis
- Ddx:Urticaria
- Ddx:VIP
- Ddx:VLDL Hyperlipidemia
- Ddx:Vaginal Bleeding
- Ddx:Vaginal Discharge
- Ddx:Vasculitis
- Ddx:Ventricular Fibrillation
- Ddx:Ventricular Tachycardia
- Ddx:Vertigo
- Ddx:Vesicular & Bollous Lesions
- Ddx:Vesicular Breathing
- Ddx:Vision Loss
- Ddx:Vital Capacity