Lee Se Il, Choi Joo Heon, Sung Kun Yong, Min Joonhong, Joo Hong Sil
Department of Plastic and Reconstructive Surgery, Hanil General Hospital, Seoul, Korea.
Department of Plastic and Reconstructive Surgery, Kangwon National University Hospital, Kangwon National University College of Medicine, Chuncheon, Korea.
Indian J Dermatol. 2022 Mar-Apr;67(2):207. doi: 10.4103/ijd.ijd_58_21.
Proliferating pilar tumours, also known as trichilemmal tumours, are rare tumours that arise from the external root sheath of hair follicles. These lesions usually have a firm-to-soft texture and form small nodules, but may grow gradually, causing pressure ulceration or hyperkeratinisation. Because of this feature, care should be taken to differentiate proliferating pilar tumours from squamous cell carcinoma. An 89-year-old woman presented with a protruding horn-shaped mass on her left malar area, which was first misdiagnosed as squamous cell carcinoma and then revealed to be a low-grade malignant proliferating pilar tumour. We report this case due to its rarity and clinically atypical characteristics.
增殖性毛根鞘瘤，也称为毛囊漏斗瘤，是一种罕见的肿瘤，起源于毛囊的外根鞘。这些病变通常质地由硬至软，形成小结节，但可能逐渐生长，导致压迫性溃疡或角化过度。由于这一特征，应注意将增殖性毛根鞘瘤与鳞状细胞癌区分开来。一名89岁女性患者左侧颊部出现一个突出的角状肿物，最初被误诊为鳞状细胞癌，后来发现是低级别恶性增殖性毛根鞘瘤。鉴于该病例罕见且具有临床非典型特征，我们特此报告。
