CASE 647: PILOMATRIXOMA of MALHERBE, Dr PHAN THANH HẢI, Dr LÊ THANH LIÊM, Dr LÊ THÔNG LƯU, Prof. NGUYỄN SÀO TRUNG, MEDIC MEDICAL CENTER, HCMC, VIETNAM

 

A 11 year-old female patient with a small cyst on left side of her neck for 5 months. A TB regimen started for a while.

Ultrasound detected a cyst of subcutaneous layer on left side of the neck, well-limited, round, with a dark line adhered the skin. Echostructure is mixed: cystic and some trabecular thicker semisolid structures inside which are like septation. It exists some septa with colored signal arterial type.

Discussion:

Common cystic lesion in subcutaneous layer adhering the skin usually named sebaceous cyst, epidermoid cyst. But in this case, a very small dark incontinuous in upper border of the cyst helps thinking to a skin hair. That is the key of a pilomatrixoma which is still a rare entity of habit in clinic.

The cyst was entirely removed.

Histopathogic result is a benign tumor of

the hair follicle matrix, name Pilomatrixoma or  Calcifying Epithelioma of Malherbe.

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