0 Medical One Liners 451-460

451. Periampullary carcinoma: Double duct sign

452. Carcinoma head of pancreas: Barium study - Widening of C loop of duodenum.

453. Down's syndrome: Antenatal ultrasound 
  • Increased Nuchal Translucency >3mm (between 11.3 to 13.6 weeks gestation)
    • Not to be confused with Nuchal fold thickness which is taken between 18 to 22 weeks of gestation
  • Absent / Hypoplastic Nasal bone
454. Ostium secundum is the Most common type of ASD, 
  • but in Down's syndrome - Ostium Primum.
455. Pancreatits: Investigation
  • Acute pancreatits: CECT is best
  • Chronic Pancreatitis: ERCP best, shows chain of lakes

456. Vertebral collapse
  • Normal IV disc
    • Trauma
    • Neoplasm
      • Adult - Multiple myeloma , Metastasis
      • Child - Histiocytosis
  • Reduced IV disc - Pott's spine
457. Most commonly PET scan uses 18 FDG
  • In myocardial perfusion - PET uses Rubidium 82
458. Bone infarct / Avascular necrosis - Best test is MRI

459. Vaginal epithelium is derived from endoderm of the urogenital sinus.

460. Half life of 18-FDG is 110 mins.

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