41 results
Causes of Thrombocytopenia - Differential Diagnosis Algorithm
 
Decreased Megakaryopoiesis
 • Aplastic Anemia
 • Toxic Damage (e.g.
Toxic Damage (e.g ... Displacement (e.g ... methotrexate) • Drugs Autoimmune ... Non-lmmune: • HELLP Syndrome ... Foreign Surface (e.g
Causes of Erythema Nodosum - Mnemonic

NO cause found in 60% of cases
Drugs (antibiotics e.g., sulfonamides, amoxicillin)
Oral
Mnemonic NO cause ... Drugs (antibiotics e.g ... Sarcoidosis or Lofgren's syndrome ... Viral: HSV, EBV, HIV ... #Differential #
Causes of Fat Malabsorption - Differential Diagnosis
Biliary Duct Obstruction
 • Autoimmune— PBC, PSC
 • Infection— liver
Causes of Fat Malabsorption ... - Differential ... Cholestatic drugs- e.g ... • Short bowel syndrome ... #Diagnosis #Causes
Diagnostic Framework for Hemolysis - Intravascular vs Extravascular Causes
Intravascular Hemolysis:
 • Mechanical Trauma (Microangiopathic hemolytic anemia):
(usually IgG) (e.g ... (usually IgM) (e.g ... deficiencies (e.g ... Membrane defects (e.g ... #differential #
Causes of Primary Amenorrhea - Differential Diagnosis Algorithm
No onset of menarche by age 16 with secondary
Amenorrhea - Differential ... Gonadal Dysgenesis (e.g ... Gonadal Dysgenesis (e.g ... Ovarian Failure (Autoimmune ... • Functional (e.g
Causes of Encephalopathy - Differential Diagnosis Algorithm
Hyperacute:
 - Primary Neurologic: Vascular (IS, ICH), Seizure, Migraine, Trauma
Causes of Encephalopathy ... - Differential ... Vascular (IS, ICH ... paraneoplastic syndromes ... Endocrinopathy, Malignancy, Autoimmune
Causes of Fever of Unknown Origin (FUO) - Differential Diagnosis
 • Infection: Extrapulmonary tuberculosis, Abscess, Endocarditis,
Origin (FUO) - Differential ... Infected thrombosis, (e.g ... Lemierre's syndrome ... Inflammatory Diseases (e.g ... . autoimmune): Lupus
Causes of Fatigue - Differential Diagnosis Algorithm
Endocrine
 • Hypo/Hyperthyroidism
 • Diabetes
 • Pituitary Insufficiency
 • Adrenal
Causes of Fatigue ... - Differential ... Autoimmune / Inflammatory ... • Drug Abuse (e.g ... Chronic Fatigue Syndrome
Causes of Thrombocytosis - Differential Diagnosis
Secondary Thrombocytosis (a.k.a Reactive Thrombocytosis):
 • Acute infection
 • Solid organ
Causes of Thrombocytosis ... - Differential ... inflammatory disorders (e.g ... . autoimmune, TB ... Myelodysplastic syndrome
Causes of Secondary Amenorrhea - Differential Diagnosis Algorithm
Absence of menses for more than 3 cycles or
<35 years old, e.g ... . autoimmune, chromosomal ... • Functional (e.g ... Infiltrative lesions (e.g ... Stalk Damage (e.g