skip to main content

Glomus Tumour — SCE Dermatology MCQ

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

HardNail DisordersGlomus TumourSCE Dermatology

A 5-mm subungual blue-red nodule causes severe point tenderness and cold-induced pain. Plain radiography is normal. What is the most useful next investigation before surgery?

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

Reveal the answer and explanation

Correct answer: D — High-resolution MRI to localize a suspected glomus tumour

Explanation lettering: B = shown as A · E = shown as B · D = shown as C · C = shown as D · A = shown as E

C is correct. The triad of paroxysmal pain, pinpoint tenderness and cold sensitivity is typical of a subungual glomus tumour. High-resolution MRI can localize a very small soft-tissue lesion, define its relation to the nail matrix and distal phalanx, and guide a complete excision when plain films are normal. Ultrasound may also help in experienced hands. Patch testing and fungal studies do not address this pain syndrome. Glomus tumours arise from thermoregulatory glomus bodies but are not generally managed as high-flow vascular malformations.

Reference: NCBI Bookshelf: glomus tumour: https://www.ncbi.nlm.nih.gov/books/NBK557832/