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Case 92: Neck swelling

A 47 year old man presented after noticing a lump in his left neck.

1. What are the differential diagnoses?

Lymph node - benign , malignant - primary or secondary
Branchial cyst
carotid body tumour
carotid artery aneurysm
lipoma
sarcoma
retropharyngeal abscess - bacterial, TB
sternomastoid tumour

2. In that position, what is the most likely diagnosis?

Just emerging from under the junction of the middle and upper thirds of the SCM - Branchial cyst.