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Vol 3 is here, and it opens in the reporting room. 🩻A radiologist decodes the X-ray and CT signs, plus 70 more classic c...
10/10/2026

Vol 3 is here, and it opens in the reporting room. 🩻
A radiologist decodes the X-ray and CT signs, plus 70 more classic clues from surgery, immunology, genetics, tropical fevers, rheumatology, anaesthesia and dermatology.
Three that catch people:
• Sail sign: normal thymus in a child, left lower lobe collapse in an adult.
• Marfan lens moves up and out; homocystinuria lens moves down and in.
• The scrub typhus eschar is painless. Look in the groin, axilla and under the breasts.
Vols 1 and 2 are on the grid: comment CLUES and CLUES2 there.
⚡ Comment CLUES3 for this PDF.
MedStudent Academy | USMLE • FMGE • NEET PG

10/10/2026

Unconjugated is before the liver. Conjugated is the liver, or the pipes after it.

ALT out of proportion = the cells. ALP out of proportion = the ducts. Albumin and INR tell you how bad it is.

One page, the whole workup. Comment “LFT” and I will send it.

— Dr. Simran Kaur, MBBS, MD (Radiodiagnosis)

80 classic clues, decoded in 5 minutes. Save it.One phrase in a question stem can give away the whole diagnosis, but onl...
10/10/2026

80 classic clues, decoded in 5 minutes. Save it.
One phrase in a question stem can give away the whole diagnosis, but only if you know why.
Every card: the clue → the answer → the reason behind it.
Three look-alikes that catch people:
• Owl-eye fits both the Reed–Sternberg cell and the CMV inclusion.
• String sign is Crohn’s in an adult, but pyloric stenosis in an infant.
• Onion-skin is Ewing; sunburst is osteosarcoma.
Slide 10 has all 8 look-alikes on one screen.
⚡ Comment CLUES for the printable PDF.
MedStudent Academy | USMLE • FMGE • NEET PG

Three that catch people:• Cherry-red spot with a big liver is Niemann–Pick; without one, it’s Tay–Sachs.• Cherry-red liv...
10/09/2026

Three that catch people:
• Cherry-red spot with a big liver is Niemann–Pick; without one, it’s Tay–Sachs.
• Cherry-red lividity is carbon monoxide; bitter almonds mean cyanide.
• Sensitive tests rule OUT (SnNout); specific tests rule IN (SpPin).

⚡ Comment CLUES2 for this PDF.
MedStudent Academy | USMLE • FMGE • NEET PG

10/08/2026

Green vomit in a newborn? Malrotation with volvulus until proven otherwise. 🌀

Normal
The duodenum crosses the midline to a DJ flexure high on the left. The caecum sits low on the right. Between them: a wide, stable mesenteric root.

Malrotation
Flexure low and to the right · caecum high → the root becomes a narrow stalk → the midgut twists around the SMA.

Ultrasound
🔹 Normal: SMV on the right of the SMA
🔹 SMV on the left = a clue
🔹 SMV swirling clockwise round the SMA = whirlpool sign = volvulus

Upper GI
Duodenum fails to cross the midline and spirals down = corkscrew

⏱ Don’t wait. A twisted midgut can die within hours. Call the surgeon.

💬 Comment TWIST and I’ll DM you the one-page sheet.

— Dr Simran Kaur, MBBS, MD (Radiodiagnosis)
Radiology Star by Dr Simran Kaur · MedStudent Academy · USMLE Star

10/06/2026

Baby right side down · small feed · find the gallbladder → the pylorus is right beside it.

Normal
Thin muscle, and the channel opens to let milk through.

Pyloric stenosis
🔹 Single muscle wall ≥ 3 mm
🔹 Channel length ≥ 15 mm
🔹 It never opens
🔹 Thick muscle bulging into the antrum = cervix sign · transverse = doughnut

Borderline?
Watch for 5–10 minutes. Pylorospasm relaxes. Stenosis doesn’t.

🚩 Green (bilious) vomit is not pyloric stenosis. Malrotation with volvulus until proven otherwise → urgent upper GI study.

💬 Comment PYLORUS and I’ll DM you the one-page sheet.

— Dr Simran Kaur, MBBS, MD (Radiodiagnosis)
Radiology Star by Dr Simran Kaur · MedStudent Academy · USMLE Star

10/05/2026

Hepatitis B markers appear on a clock. 🦠⏱️
HBsAg = infection · HBeAg = high replication · IgM anti-HBc = recent

🕐 ~4 weeks → HBsAg first, then HBeAg (highly infectious), often before symptoms
🕐 ~8 weeks → Acute hepatitis: jaundice, ALT peaks, IgM anti-HBc appears
🕐 4–6 months → Window period: HBsAg gone, anti-HBs not yet. The only positive marker is IgM anti-HBc
🕐 > 6 months → Verdict:
Recovered = anti-HBs +, HBsAg −, IgG anti-HBc +
Chronic = HBsAg > 6 months, IgG anti-HBc + (HBeAg + → replicating)
Vaccinated = anti-HBs only

Save this 📌 Next clock: burns 🔥

neetpg usmle fmge medicalstudent medicine revision

Receptors and signalling: 8 hard concepts in 5 minutes. Save it.Three that catch people out:• Most H1 antihistamines are...
10/03/2026

Receptors and signalling: 8 hard concepts in 5 minutes. Save it.
Three that catch people out:
• Most H1 antihistamines are inverse agonists, not neutral antagonists.
• Benzodiazepines have a ceiling, barbiturates don’t. A positive allosteric modulator can’t push past GABA’s own maximum.
• Suxamethonium after burns or denervation → hyperkalaemia. Receptors spread over the whole muscle fibre.
Part 1 (kinetics & interactions): comment COMPLEX. Part 3 next.
⚡ Comment RECEPTOR for this PDF.
MedStudent Academy | USMLE • FMGE • NEET PG

10/01/2026

Ileocolic intussusception on ultrasound:
▪️ Usually in the right abdomen, often just under the liver; scan with a high-frequency linear probe
▪️ Transverse → TARGET sign: concentric rings of bowel wall with an eccentric crescent of echogenic mesenteric fat (± lymph nodes)
▪️ Longitudinal → PSEUDOKIDNEY sign: layered bowel-within-bowel
▪️ Ileocolic intussusceptions are usually over 2.5 cm across. Small, short, transient small-bowel intussusceptions are often incidental.
▪️ Report: free fluid, trapped fluid, Doppler flow in the bowel wall, and any lead point

Save this for your next paeds abdomen.

— Dr Simran Kaur, MBBS, MD (Radiodiagnosis)
Radiology Star · MedStudent Academy · USMLE Star
: radiologystar mdradiology dmrd frcr radiologyeducation

8 hard pharmacology concepts in 5 minutes: spare receptors, tolerance, distribution phase, displacement, extraction rati...
10/01/2026

8 hard pharmacology concepts in 5 minutes: spare receptors, tolerance, distribution phase, displacement, extraction ratio, enterohepatic loop, induction timing, pharmacogenetics. Comment COMPLEX for the PDF.
generalpharmacology
pharmacokinetics pharmacodynamics pharmacogenetics druginteractions
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