Cardiology Pairs
STEMI vs Pericarditis: STEMI = convex ST elevation, reciprocal changes, no PR depression. Pericarditis = concave ST elevation, PR depression, no reciprocal changes.
Stable Angina vs MI: Stable angina = exertional, relieved by rest/NTG, no enzyme rise. MI = rest pain, prolonged, enzyme rise.
Atrial Fibrillation vs Atrial Flutter: AF = irregularly irregular, no P waves, variable ventricular response. AFlutter = regular/sawtooth, flutter waves, usually 2:1 or 3:1 block.
Medicine Pairs
RA vs SLE: RA = symmetric small joint, morning stiffness, rheumatoid factor, CCP. SLE = malar rash, ANA positive, dsDNA specific, multi-system.
Addisons vs Cushings: Addison = hypocortisolism, hyperpigmentation, hypotension. Cushing = hypercortisolism, central obesity, moon face, buffalo hump.
Microbiology Pairs
Typhoid vs Paratyphoid: S. typhi = Widal positive, rose spots, ileal ulcers. S. paratyphi = milder disease, similar presentation.
Surgery Pairs
Appendicitis vs Mesenteric Adenitis: Appendicitis = McBurney point tenderness, Rovsing sign, leucocytosis. Mesenteric adenitis = children, recent viral illness, diffuse pain.
Revision history
- 19 September 2026 — Initial publication
Frequently asked questions
Why do confused topics appear in pairs?
Exam setters deliberately place similar-sounding conditions or drugs together to test depth of knowledge. This is the most common exam technique across all medical PG exams.
How do I tell similar conditions apart?
Focus on the ONE key differentiating feature. Examples: MI vs pericarditis (ST elevation: convex vs concave, PR depression), SLE vs RA (ANA pattern, joint involvement pattern).
Are these topic pairs the same for NEET PG?
Yes — 70-80% of these pairs are identical for NEET PG. The distinguishing features are the same. Learning these pairs helps both exams simultaneously.
Related reading
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