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Prominent external occipital protuberance

Case contributed by Bahman Rasuli


The mass sensation at occiput region.

Patient Data

Age: 15 years
Gender: Male

Osseous proliferation at the posterior occipital region is related to prominent external occipital protuberance.

Case Discussion

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

Exaggerated external occipital protuberance also is known as an occipital spur.

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