| E-IJD® - CASE REPORT |
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| Year : 2022 | Volume
: 67
| Issue : 2 | Page : 207 |
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Proliferating Pilar Tumor of the Cheek Misdiagnosed as Squamous Cell Carcinoma
Se Il Lee1, Joo Heon Choi1, Kun Yong Sung2, Joonhong Min3, Hong Sil Joo1
1 From the Department of Plastic and Reconstructive Surgery, Hanil General Hospital, Seoul, Korea
2 Department of Plastic and Reconstructive Surgery, Kangwon National University Hospital, Kangwon National University College of Medicine, Chuncheon, Korea
3 Department of Dermatology, Kangwon National University College of Medicine, Chuncheon, Korea
Correspondence Address:
Hong Sil Joo
Department of Plastic and Reconstructive Surgery, Hanil General Hospital, 308, Uicheon-ro, Dobong-gu, Seoul
Korea
 Source of Support: None, Conflict of Interest: None  | Check |
DOI: 10.4103/ijd.ijd_58_21
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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.
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