Çoban Kübra, Akkaya Hampar, Aydın Erdinç
1Otorhinolaryngology Department, Medical Faculty, Başkent University, Ankara, Turkey.
2Pathology Department, Başkent University, Ankara, Turkey.
Indian J Otolaryngol Head Neck Surg. 2019 Nov;71(Suppl 2):1436-1438. doi: 10.1007/s12070-018-1522-1. Epub 2018 Nov 3.
Proliferating trichilemmal tumor (PTT) is a rare but morphologically characteristic tumor, derived from the external root sheath. They are commonly localized as a solitary lesion on the scalp. They rarely occur in other regions. PTTs generally behave in a benign fashion, up to 20% of the lesions may undergo malignant transformation into squamous carcinoma. We present an elderly woman with a cystic swelling on the crus of auricular helix diagnosed as PTT. To our knowledge, this is the first case in the English literature, of PTT of the auricula.
增殖性外毛根鞘瘤（PTT）是一种罕见但具有形态学特征的肿瘤，起源于外根鞘。它们通常表现为头皮上的孤立性病变。很少发生在其他部位。PTT一般呈良性表现，高达20%的病变可能恶变为鳞状细胞癌。我们报告一例老年女性，其耳轮脚处有一个囊性肿物，诊断为PTT。据我们所知，这是英文文献中首例耳部PTT病例。
