skip to main content

Positional plagiocephaly — RACP Paediatrics MCQ

Instant feedback + full explanation. One question, done properly.

EasyNeurologyPositional plagiocephalyRACP Paediatrics

A 6-month-old has a flat occiput on the right with contralateral frontal bossing, giving a parallelogram head shape. The posterior fontanelle is patent and no suture ridging is palpable. The infant preferentially turns the head to the right and has mild right-sided torticollis. What is the most likely diagnosis?

Educational content. Not a substitute for clinical judgement or local policy.

Reveal the answer and explanation

Correct answer: B — Plagiocephaly (positional)

Parallelogram-shaped skull deformity (flat occiput with contralateral frontal bossing) with patent sutures and associated torticollis is positional (deformational) plagiocephaly. It is distinguished from lambdoid craniosynostosis by the parallelogram shape (not trapezoid). Management includes repositioning, tummy time, physiotherapy for torticollis, and helmet therapy if severe and not improving by 6 months.

Reference: RCH Melbourne – 2023 – Plagiocephaly CPG; RACP Paediatric Curriculum – Neurology