What is a proliferating trichilemmal cyst? A proliferating trichilemmal cyst, also known as proliferating pilar tumour of the scalp, is a rare benign hair follicle tumor. Most proliferating trichilemmal cysts arise from within a preexisting trichilemmal or pilar cyst.

2020年1月27日 · A proliferating pilar tumor (PPT) is a rare neoplasm arising from the isthmus region of the outer root sheath of the hair follicle. It is also commonly called a...

Proliferating trichilemmal cysts (also known as a pilar tumor, proliferating follicular cystic neoplasm, proliferating pilar tumor, and proliferating trichilemmal tumor) [1] is a cutaneous condition, characterized by proliferations of squamous cells forming scroll-like structures.

Proliferating pilartumors (PPT) are rare tumors and less than 100 well-documented cases of malignant PPT have been reported so far in the literature. These tumors have been recently classified into benign, low- and high-grade malignant tumors and statistically significant difference was found in their biological behavior.

What is a malignant proliferating trichilemmal cyst? Malignant proliferating trichilemmal cyst, also known as malignant proliferating pilar tumour, is a very rare malignant hair follicle tumor.

2020年10月28日 · Proliferating pilar tumor is a rare cutaneous adnexal neoplasm, closely resembling and potentially misdiagnosed as conventional squamous cell carcinoma. Malignant forms are recognized; however, differentiating criteria have not been firmly established due to their exceptional rarity.

2023年10月1日 · Proliferating pilar tumors are rare neoplasms that differentiate toward the outer sheath near the isthmus and can rarely undergo malignant transformation. We performed histopathologic evaluation on 26 benign proliferating pilar tumor (BPPT) and 17 malignant proliferating pilar tumor (MPPT).

Proliferating trichilemmal tumor (PTT) shows features of typical pilar cyst, but additionally shows extensive epithelial proliferation, variable cytologic atypia and mitotic activity.

We studied proliferating pilar tumors (PPTs) to establish histologic criteria that could predict behavior. We reviewed all cases in our consultation files (1989-2000) and evaluated 76 cases with meaningful follow-up information.

Proliferating pilar tumors (PPTs) are rare cutaneous neoplasms arising from hair follicles that have both malignant and metastatic potential. To present a systematic review of the epidemiology, clinical characteristics, and treatment and outcome data on PPTs.