Abdominal & Neuro Imaging · NEET PG Preparation Radiology
A 3-week-old male infant presents with non-bilious projectile vomiting after feeds. On ultrasound of the abdomen, the pyloric muscle thickness is mea…
Practice question from Abdominal & Neuro Imaging (NEET PG Preparation Radiology), with the correct answer and a step-by-step solution.
easy · MCQ · Q-AEEB52
A 3-week-old male infant presents with non-bilious projectile vomiting after feeds. On ultrasound of the abdomen, the pyloric muscle thickness is measured at 4.5 mm and the pyloric channel length is 18 mm. What is the most specific ultrasound criterion for the diagnosis of infantile hypertrophic pyloric stenosis (IHPS)?
- A.Pyloric muscle thickness > 3 mmCorrect answer
- B.Stomach length > 5 cm
- C.Gastric emptying time < 30 minutes
- D.Duodenal cap dilatation
Solution
Ultrasound is the modality of choice for diagnosing infantile hypertrophic pyloric stenosis. Diagnostic criteria include a pyloric muscle thickness greater than 3 mm (often > 4 mm) and a pyloric channel length greater than 14 mm. The 'cervix sign' and 'target sign' are also classically seen.
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