Kyste trichilemmal proliférant : une présentation inhabituelle

Viarnaud, A.; Alhazmi, Khalid; Constant, George A.; Gaudron, Sophie; Hirsch, G.; Janier, M.; Ochisor, R.; Hillion, B.

doi:10.1016/j.annder.2016.12.007

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2021

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“…The increase in the size of a TC and ulceration are sufficient signals to suspect this proliferation; however, ulceration is not always obligatory. PTC is a benign tumor that usually occurs in older women with an average age of 65 years [5]. PTC usually appears in areas of high hair density, especially the scalp [6], but other atypical localizations are reported in the literature [3,7,8].…”

Section: Discussionmentioning

confidence: 99%

The Proliferating and Malignant Proliferating Trichilemmal Cyst: An Anatomo-Clinical Study of Three Cases

Kamal

Hali

Marnissi

et al. 2021

Skin Appendage Disord

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Background: The proliferating and malignant proliferating trichilemmal cysts (MPTC) are rare adnexal tumors. We report 3 cases through which we will detail the anatomo-clinical characteristics of these tumors. Cases: Two patients, 60 and 56 years old, consulted for multiple scalp nodules, one of which had changed with the appearance of a central ulceration. The removal of the remaining scalp nodules was in favor of PTCs. The third patient presented with an ulcerative lesion occupying the vertex. Skin biopsy found trichilemmal-type keratinization associated with areas of necrosis concluding with a MPTC. Discussion: The PTC is a transitional form between the trichilemmal cyst (TC) and the MPTC. The increase in the size of a TC and ulceration are sufficient signals to suspect this evolution.

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