Presentation
The mass sensation at occiput region.
Patient Data
Age: 15 years
Gender: Male
From the case:
Prominent external occipital protuberance


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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.