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Congenital hypertrophic pyloric stenosis/ Gastric Outlet Obstruction โ€” UPSC CMS MCQs (Surgery) · 3 questions

2020 P1 Q113

Q1. A 4-week old infant presents with repeated episodes of non-bilious vomiting since 7 days. The infant seems active and hungry after the vomiting. Examination reveals an olive-shaped mass in the epigastrium. Which metabolic abnormality is expected in this infant?

  1. Hyperchloremia
  2. Metabolic alkalosis
  3. Hyperkalemia
  4. Hyponatremia

Answer & explanation โ€” reveal it in the interactive practice above.

PYQ 2020โ€“2025 โ€” page 35

2022 P2 Q5

Q2. The most common metabolic abnormality associated with gastric outlet obstruction is:

  1. Hypochloremic acidosis
  2. Hypochloremic alkalosis
  3. Hyperchloremic alkalosis
  4. Hyperchloremic acidosis

Answer & explanation โ€” reveal it in the interactive practice above.

PYQ 2020โ€“2025 โ€” page 175

2025 P2 Q32

Q3. Which one of the following statements is not correct regarding Gastric outlet obstruction associated with long standing peptic ulcer disease?

  1. Hypochloraemia alkalosis is the usual metabolic abnormality in such cases.
  2. Endoscopic biopsy is essential to exclude malignancy.
  3. Medical therapy has no role in the treatment of this condition.
  4. Operation is frequently required along with a drainage procedure.

Answer & explanation โ€” reveal it in the interactive practice above.

PYQ 2020โ€“2025 โ€” page 431

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