BACKGROUND: @entity17390 have a wide variety of clinical characteristics and are often misdiagnosed. This can result in extensive surgery for an essentially benign condition. OBJECTIVE: The purpose of this study was to define the clinical and histologic spectrum of these @entity5 to aid diagnosis. METHODS: Two hundred nine cases were analyzed retrospectively with regard to age at presentation, site, size, and physical appearance. RESULTS: @entity17390 appear at any age, with peak presentation bimodally in the first and sixth decade. Their most common site is the head and neck. Presentation is of a hard nodule, either deeply subcutaneous and invisible or superficial with possible erosion through the skin surface. This may lead to a false diagnosis of @entity5 or of an @entity4890 . An association with @entity3918 has been confirmed, as is the rare occurrence of malignant transformation. CONCLUSION: Careful clinical examination and a high index of suspicion results in an accurate diagnosis, appropriate treatment, and the avoidance of unnecessarily extensive surgery.

A clinical review of 209 XXXX .

@entity5 :: ('MESH:D009369', 'Disease') :: ['malignancy', 'tumors'] @entity17390 :: ('MESH:D018296', 'Disease') :: ['Pilomatricomas'] @entity4890 :: ('MESH:D004814', 'Disease') :: ['epidermoid cyst'] @entity3918 :: ('MESH:D009223', 'Disease') :: ['myotonic dystrophy']
@entity17390 :: (MESH:D018296,Disease) :: ['pilomatricomas']
