Melanonychia associated with subungual follicular inclusions: report of three cases

Oliveira, Marina Câmara de; Barcauí, Carlos Baptista; Barcaui, Elisa de Oliveira; Piñeiro-Maceira, Juãn

doi:10.1016/j.abd.2019.03.009

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“…The researchers hypothesized that the subungual PTT was derived from the nail matrix, which could keratinize to a trichilemmal organization ( 5 ). PTT may also result from follicular units containing nail bed epithelium remaining in nails ( 8 ).…”

Section: Discussionmentioning

confidence: 99%

Case report: Malignant proliferating trichilemmal tumor of the thumb

Wang

Zhou²,

Luo³

et al. 2022

Front. Oncol.

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Proliferating trichilemmal tumor is a very rare benign tumor that has the potential to transition into a malignant tumor. PTT most commonly affects the scalps of women above 60 years old and is frequently misdiagnosed due to its rarity. Herein, we present a case of a 68-year-old man with a malignant proliferating trichilemmal tumor on his right thumb. X-ray image showed a soft tissue mass on his thumb accompanied by bone destruction, while 18F-FDG PET revealed a hypermetabolic mass in the first index with axillary lymph node metastasis.

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Section: Discussionmentioning

confidence: 99%