The ten organ systems
Choose a system.
Every system page opens with its high-yield chief complaints, the differential each one generates, and the specific killers you must rule out first. Disease deep-dives follow beneath.
01 · 16%
Cardiovascular
Chest pain, dyspnea, palpitations, syncope, edema. The most heavily tested system on the exam.
02 · 11%
Pulmonary
Obstructive vs restrictive vs vascular vs infectious. Dyspnea and cough lead the differential.
03 · 9%
Gastrointestinal
Abdominal pain by location. GI bleeding, jaundice, diarrhea patterns.
04 · 8%
Renal & GU
AKI, CKD, electrolytes, acid-base disorders, hematuria. Nephritic vs nephrotic.
05 · 8%
Neurology
Headache, focal deficit, altered mental status, seizures, weakness.
06 · 7%
Endocrine
Diabetes, thyroid, adrenal, pituitary, calcium. Classic lab patterns.
07 · 8%
Infectious Disease
Fever workup, sepsis, meningitis, endocarditis, HIV, travel infections.
08 · 10%
OB / Gyn
Pregnancy, bleeding, contraception, prenatal screening, complications.
09 · 8%
Pediatrics
Fever, rash, failure to thrive, respiratory distress, developmental red flags.
10 · 9%
Psychiatry
Mood, anxiety, psychosis, substance use, personality disorders. Suicide risk.