Presentation
Occipital headache.
Patient Data
Age: 30 years
Gender: Male
From the case:
Massive external occipital protuberance
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Massive external occipital protuberance
Case Discussion
External occipital protuberance (EOP) is a midline bony prominence in the occipital bone that ligamentum nuchae and trapezius muscle attach to its tip that named Inion. The tentorium cerebelli attaches to its internal surface. Entheses are the sites of ligament, tendon or joint capsule attachment to the bone. The formation of enthesophytes is multifactorial. Enthesopathy in sites such as external occipital protuberance is not always painful but pain at occipital region is a common complaint.
Exaggerated external occipital protuberance also known as occipital spur.
Osteoma and metestasis are in differential diagnosis.
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