Proliferating trichilemmal cyst

Case contributed by Abdulmajid Bawazeer
Diagnosis almost certain


The patient came complaining of dizziness and headache (Incidental finding)

Patient Data

Age: 60 years
Gender: Female

There are about three well-defined subcutaneous scalp hyperdense complex lesions with internal calcification. No bony invasion. 

The are multiple shallow densities seen in the gray-white matter of left parietal lobe and periventricular white matter, suggestive of Ischemic stroke, however, MRI is better for more evaluation. 

Case Discussion

Proliferating trichilemmal cysts are dermal or subcutaneous tumors with squamoid cytologic features and trichilemmal-type keratinization usually arising in the scalp.

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