Overview
Pilomatrixoma, also known as calcifying epithelioma of Malherbe, is a benign cutaneous adnexal tumor with differentiation towards hair matrix cells. It can present in various atypical forms including bullous, perforating, and extruding variants 137.Diagnosis
Clinical Presentation: Often presents as a solitary, firm nodule, but can exhibit atypical features like bullous, perforating, or extruding characteristics 137.
Histopathology: Definitive diagnosis through histopathologic examination showing shadow cells, basophilic cells, and dystrophic calcification 16.
Imaging: Not typically required but may aid in assessing tumor extent, especially in atypical presentations 5.
Differential Diagnosis: Includes other skin tumors and masses, particularly in atypical locations such as breast or parotid gland 45.Management
Primary Treatment: Surgical excision is the mainstay of treatment to ensure complete removal and prevent recurrence 25.
Surgical Approach: Superficial parotidectomy may be necessary for parotid masses to avoid damaging surrounding structures 5.
Postoperative Care: Standard wound care and monitoring for recurrence 2.Special Populations
Pediatrics: Common in children; surgical excision remains the primary management approach 2.
Atypical Presentations: Requires careful clinical evaluation to avoid misdiagnosis, especially in unusual locations like breast 4.Key Recommendations
Surgical Excision for Diagnosis and Treatment: Perform complete surgical excision for definitive diagnosis and treatment of pilomatrixoma to prevent recurrence (Evidence: Strong 25).
Histopathologic Confirmation Essential: Histopathologic examination is crucial for confirming the diagnosis due to the varied clinical presentations (Evidence: Strong 16).
Consider Atypical Presentations: Exercise caution in atypical presentations, such as extruding or perforating forms, to avoid misdiagnosis and ensure appropriate management (Evidence: Moderate 137).References
1 DiGiorgio CM, Kaskas NM, Matherne RJ, Shannon AB, Lee BD. Bullous pilomatricoma: a rarely reported variant of pilomatricoma. Dermatology online journal 2015. link
2 Rao PL, Ramnarayan K. Pilomatricoma: report of two cases in children. Journal of pediatric surgery 1992. link90481-l)
3 Zulaica A, Peteiro C, Quintas C, Pereiro M, Toribio J. Perforating pilomatricoma. Journal of cutaneous pathology 1988. link
4 Hamilton A, Young GI, Davis RI. Pilomatrixoma mimicking breast carcinoma. The British journal of dermatology 1987. link
5 Brandner MD, Bunkis J. Pilomatrixoma presenting as a parotid mass. Plastic and reconstructive surgery 1986. link
6 Zina AM, Bundino S, Torre C. Gross pathology and scanning electron microscopy of pilomatricoma. Journal of cutaneous pathology 1985. link
7 Poorten HJ, Sharbaugh AH. Extruding pilomatricoma. Report of a case. Cutis 1978. link