Proliferating Trichilemmal Tumor of the Auricula: A Very Rare Locus
- 8 Downloads
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.
KeywordsProliferating trichilemmal tumor Aurikula Benign auricular lesions
Compliance with Ethical Standards
Conflict of interest
The authors of this study declare that they have no conflict of interest.
- 4.Kaddu S, Requena L (2006) Malignant tumours with follicular differentiation. In: LeBoit PE, Burg G, Weedon D, Sarasain A (eds) World Health Organization classification of tumours. Pathology and genetics of skin tumours. IARC Press, Lyon, pp 149–151Google Scholar