Pilomatrixoma of the retroauricular area and arm

Pilomatricoma in childhood: a retrospective study from three European paediatric centres

“…Pilomatricoma has a predilection for the neck and face region (over 50% of cases) [1,9,16,37], as it occurred in our cases, with a female predominance [6,8,25,31]. Other locations include the upper extremity, trunk and lower extremity in decreasing order of occurrence.…”

“…Pilomatricoma is an asymptomatic slowly growing benign cutaneous tumour, differentiating towards the hair matrix, covered by normal or hyperemic skin, and usually varying in size from 5 to 30 mm [21,25,39].…”

“…[1,18,25,30,34]. Previous studies have shown that the rate of preoperative diagnostic accuracy of pilomatricomas ranges from 0% to 49% [1,6,16,20,29].…”

“…It is considered as an epithelioma of the hair follicles with cytodifferentiation of the hair matrix cells, the hair cortex and cells of the inner sheath [25]. Pilomatricoma was first described in 1880 by Malherbe and Chenantais [22] who thought it derived from the sebaceous glands and later, by Forbis and Helwing in 1961 [10] who thought it was derived from the hair matrix; therefore the term pilomatrixoma was proposed to correctly describe its origin thus avoiding the word epithelioma which carries a connotation of malignancy.…”

Pilomatrixoma—accuracy of clinical diagnosis

“…Despite close excision, the recurrence rate is low. D 2006 Elsevier Inc. All rights reserved.In 1880, Malherbe and Chenantais [1] described a benign skin tumor and named it bcalcifying epithelioma.Q Subsequently, the origin from matrix cells of hair follicles was confirmed by histochemical and ultrastructural studies, and the term bpilomatrixomaQ was coined; bpilomatricomaQ and btrichomatricomaQ are alternatives [2][3][4].The aim of the study was to assess the accuracy of clinical diagnosis. It was prompted by an index patient-a 12-year-old girl who presented with a 2-year history of a lump in the right earlobe (Fig.…”