Proliferating trichilemmal tumor (PTT) is rare and follows a protracted course, almost always benign. Nevertheless an adverse outcome may occur. Usually PTT presents as an indolent mass in the scalp of elderly women. We report a case of PTT localized in the ischiorectal fossa, which might have been diagnosed as an epidermoid carcinoma.
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http://dx.doi.org/10.1016/j.annpat.2011.05.011 | DOI Listing |
Dermatopathology (Basel)
December 2024
Department of Pathology & Immunology, Baylor College of Medicine, Houston, TX 77030, USA.
Malignant proliferating trichilemmal tumors (MPTTs), arising from the external root sheath of hair follicles, are exceptionally rare, with limited documentation of their genetic alterations. We present a case of a 64-year-old African American woman who initially presented with a gradually enlarging nodule on her posterior scalp. An initial biopsy at an outside hospital suggested metastatic adenocarcinoma or squamous cell carcinoma (SCC) of an uncertain origin.
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November 2024
Department of Surgery, Ng Teng Fong General Hospital, Singapore, SGP.
Trichilemmal cysts, also known as pilar cysts, are commonly found on hair-bearing surfaces, such as the scalp or hairline. These are cysts that form from hair follicles and are benign. We describe an unusual case of a middle-aged lady presenting with a longstanding left-sided inframammary mass that had started growing more in the last year prior to the presentation.
View Article and Find Full Text PDFFront Oncol
November 2024
Department of Dermatology, Second Affiliated Hospital of Jilin University, Changchun, China.
Trichilemmal carcinoma is an extremely rare malignant cutaneous tumor derived from the outer root sheath of the hair follicles, which most commonly occurs in the sun-exposed areas of elderly individuals. This article introduces a case of trichilemmal carcinoma that occurred on the scalp of a 36-year-old male patient, the first case reported and treated with surgical excision combined with photodynamic therapy.
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November 2024
General Surgery, Malavya Hospital, Bengaluru, IND.
A 54-year-old male with a past history of acute pancreatitis and pulmonary embolism presented with a scalp tumor in the occipital region for a six-month duration. With a biopsy report of squamous cell carcinoma, wide local excision with the lower island trapezius myocutaneous flap with skin grafting was done. However, the final pathology report revealed a proliferating trichilemmal tumor with clear margins.
View Article and Find Full Text PDFJ Surg Oncol
November 2024
Department of Surgery, MercyOne Medical Center, Des Moines, Iowa, USA.
Malignant proliferating trichilemmal tumors (MPTT) are rare skin lesions arising from the outer sheath of the hair follicle root. Because of their rarity and difficulty in pathologic identification, these skin lesions are often initially misdiagnosed. After a literature review, we found initial clinical or histopathological misdiagnosis has an associated 10.
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