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International Journal of Trichology International Journal of Trichology
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REVIEW ARTICLE
Year : 2022  |  Volume : 14  |  Issue : 4  |  Page : 120-124

Alopecic and aseptic nodules of the scalp: A new entity or a minor form of dissecting cellulitis?


1 Center for Dermatology and Hair Diseases Professor Trüeb, Wallisellen, Switzerland
2 Department of Dermatology, Universidade Federal Fluminense, Centro de Ciências Médicas, Hospital Universitário Antonia Pedro, Rio de Janeiro, Brazil
3 Department of Dermatology, Lusiada University Center, São Paulo, Brazil

Correspondence Address:
Ralph Michel Trüeb
Center for Dermatology and Hair Diseases Professor Trueb, Bahnhofplatz 1A, CH-8304 Wallisellen
Switzerland
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/ijt.ijt_33_22

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Since the original report in 1992 and revised nomenclature in 2009, pseudocysts of the scalp and alopecic and aseptic nodules of the scalp (AANS), respectively, have been regarded as a new entity that is rare and not understood in its pathogenesis. We observed 26 cases of AANS. Except for the extent and severity of disease, we found no single feature that justifies distinguishing AANS as a nosologic entity in its own right from dissecting cellulitis of the scalp (DCS). The scarring alopecias represent a diverse group of disorders with the potential of permanent destruction of the pilosebaceous unit and hair loss. Within the maze of varied conditions leading to scarring alopecia, the most important is to keep a neat nosologic classification in mind, based both on morphology and a pathogenic understanding. We believe that AANS represents a minor form of DCS, so far predominantly observed in patients of non-African origin, and therefore, is a disease of follicular occlusion with a favorable prognosis.


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