Epidermal psoriasiform hyperplasia, an unrecognized sign of folliculitis decalvans: A histological study of 26 patients.

Background: Follicular hyperkeratosis along with hyperplasia of the follicular and interfollicular epithelia are major histopathological characteristics of hidradenitis suppurativa (HS). The presence of an occasional thickening of lesional skin in some folliculitis decalvans (FD) patients and histological similarities between FD and HS led us to look for epidermal hyperplasia and follicular hyperkeratosis in FD patients.

Patients And Method: We performed a retrospective histological analysis of 26 patients with FD.

[Dissecting cellulitis of the scalp: a retrospective study of 7 cases confirming the efficacy of oral isotretinoin].

Background: Dissecting cellulitis of the scalp (DCS) is a rare and long-standing disease and its aetiopathogenesis remains unclear. Various therapeutic alternatives exist. We attempted to assess the efficacy of oral isotretinoin in a series of patients.

[Frontal fibrosing alopecia].

Frontal fibrosing alopecia (FFA) was first described in 1994. It is characterized by scarring alopecia in bands involving the anterior area of the scalp. Alopecia of the eyebrows is frequently associated, as are pubic, facial and body hair alopecia.

First evidence of bacterial biofilms in the anaerobe part of scalp hair follicles: a pilot comparative study in folliculitis decalvans.

Background: The cause of folliculitis decalvans (FD) remains unknown. We hypothesized that a bacterial biofilm could be involved in its pathogenesis.

Objective: To assess the presence or not of a bacterial biofilm in the hair roots of the scalp in FD.

Alopecic and aseptic nodules of the scalp (pseudocyst of the scalp): a prospective clinicopathological study of 15 cases.

Background: Alopecic and aseptic nodules of the scalp (AANS) is a new entity reported first in Japan as 'pseudocyst of the scalp'. Only retrospective studies have been published.

Objectives: To describe the clinicopathological features of AANS (pseudocyst), to evaluate the response to doxycycline and to compare the results to those obtained from patients with dissecting cellulitis of the scalp (DCS).

A hairy paradox: congenital triangular alopecia with a central hair tuft.

Congenital triangular alopecia (CTA) is a developmental anomaly characterized by a bald patch involving the temporal region on one or, more rarely, both sides. We report 5 patients with CTA showing a central island of short hair that was categorized as terminal hair both macroscopically and microscopically. The cause of this paradoxical phenomenon is unknown.

Lichen planopilaris: update on diagnosis and treatment.

Lichen planopilaris (LPP), a follicular form of lichen planus, is a rare inflammatory lymphocyte mediated disorder. Although the physiopathology is unclear, an autoimmune etiology is generally accepted. Women are affected more than men, and the typical age of onset is between 40 and 60 years.

Clobetasol propionate shampoo 0.05% and calcipotriol solution 0.005%: a randomized comparison of efficacy and safety in subjects with scalp psoriasis.

Background: Scalp involvement in psoriatic patients represents a common issue. Treatment of the hairy skin requires adequate pharmaceutical formulations; hence, a new specific shampoo formulation of clobetasol propionate 0.05% was developed by Galderma R&D, Inc.