Prominent external occipital protuberance

Case contributed by Mahmoud Nady Hassan Mostafa

Presentation

Palpable mass in the occipital region for many years.

Patient Data

Age: 14 years
Gender: Male

Focal midline bony prominence (spur-like bony protrusion) in the posterior occipital protuberance.

Case Discussion

The external occipital protuberance is a midline bony prominence in the occipital bone in which the ligamentum nuchae and trapezius muscle attach to its tip. The tentorium cerebelli attaches to its internal surface. 

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