Follicular keratosis of the chin

Brenner, Sarah; Brandsen, Renate

doi:10.1016/s0190-9622(08)80280-0

Cited by 4 publications

(14 citation statements)

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“…2,4 An underlying genetic predisposition has also been suggested, with two reports of familial occurrence. 2,4 To date, 27 cases of FK have been reported in children, 2,3 ranging from 5 to 14 years of age, with the majority being under 10, male, and predominantly from Brazil, India, or Japan. [1][2][3][4] Interestingly, most of these publications show images of fair-skinned children.…”

Section: Introductionmentioning

confidence: 99%

“…It has been proposed that FK occurs as a result of prolonged pressure or friction on the skin, as from patients resting their palm while reading, playing video games, or watching television 1,3 . However, in some cases, FK occurs without any such history 2,4 . An underlying genetic predisposition has also been suggested, with two reports of familial occurrence 2,4 …”

Section: Introductionmentioning

confidence: 99%

“…2,4 To date, 27 cases of FK have been reported in children, 2,3 ranging from 5 to 14 years of age, with the majority being under 10, male, and predominantly from Brazil, India, or Japan. [1][2][3][4] Interestingly, most of these publications show images of fair-skinned children. In this study, we describe the clinical characteristics, histopathology, management, and outcomes in 20 children with FK, the largest series to date.…”

Section: Introductionmentioning

confidence: 99%

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Follicular keratosis of the face in pediatric patients of color

Grullon

Ashi

Shea

et al. 2022

Pediatric Dermatology

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The term follicular keratosis of the chin was first coined in 1992 by Kanzaki et al. 1 who described keratotic papules on the chin, ascribed to chronic habitual trauma, in two unrelated Japanese boys. Follicular keratosis (FK) is a poorly understood disorder of often unclear pathogenesis, presenting as multiple hyperkeratotic follicular papules coalescing into plaques, typically on the chin or jawline. [1][2][3] In two separate case reports, histopathology has been described as cystic hair follicles containing keratotic material without a surrounding inflammatory cell infiltrate. 1,3 It has been proposed that FK occurs as a result of prolonged pressure or friction on the skin, as from patients resting their palm while reading, playing video games, or watching television. 1,3 However, in some cases, FK occurs without

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Follicular keratosis of the face in pediatric patients of color

Grullon

Ashi

Shea

et al. 2022

Pediatric Dermatology

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“…Since then, this skin disorder has been called keratotic papular lesions on the chin 3 or follicular keratosis of the chin (FKC). [4][5][6][7] The lesions occurred mostly in children and teenagers. Usually, boys are affected, but girls are also affected by FKC.According to a paper 8 on the clinico-epidemiological profile of 26 patients with FKC, 19 were male and 7 were female (the male to female ratio, 2.7:1); the most commonly affected age group was 8-14 years in 22 (84.6%) children; and, history of friction or pressure was recalled by 16 patients while 10 patients did not remember.The most probable etiology of FKC currently accepted is that the patients have a habit to rest their chin on their palms while reading or watching television.…”

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Familial occurrence of follicular keratosis of the chin

Egawa

2021

The Journal of Dermatology

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A peculiar cutaneous disorder in children characterized with a presentation of multiple, closely set, hyperkeratotic follicular papules on the chin was first reported in 1972 by Arai 1 as 'a kind of follicular nevus', while, in 1979, Padilha-Goncalves 2 reported a similar condition and proposed the term 'traumatic anserine folliculosis (TAF)'. They described the stressing etiologic factors such as prolonged friction or pressure, the goose skin appearance, and follicular location of the lesions. Since then, this skin disorder has been called keratotic papular lesions on the chin 3 or follicular keratosis of the chin (FKC). [4][5][6][7] The lesions occurred mostly in children and teenagers. Usually, boys are affected, but girls are also affected by FKC.According to a paper 8 on the clinico-epidemiological profile of 26 patients with FKC, 19 were male and 7 were female (the male to female ratio, 2.7:1); the most commonly affected age group was 8-14 years in 22 (84.6%) children; and, history of friction or pressure was recalled by 16 patients while 10 patients did not remember.The most probable etiology of FKC currently accepted is that the patients have a habit to rest their chin on their palms while reading or watching television. Indeed, Kanzaki et al. 5 reported two cases whose FKC were induced by such a habit and slowly resolved after they avoided it. However, FKC was also reported in patients, including siblings, 7 without any evidence of the mechanical trauma over the chin, 7,9 suggesting the etiologies other than the physical trauma for the development of FKC.In the present study, we report two brothers with FKC who did not have any evidence of physical trauma over the chin. | C A S E REP ORTSA 7-year-old Japanese boy and his 9-year-old brother presented with papular lesions on the chin that had appeared 6 months and 3 months previously in the younger and older brother, respectively. Whitish-yellow creamy contents were often squeezed out from the top of papules in the younger brother. The children and their mother denied any habitual physical trauma over the chin. Their medical histories were unremarkable.

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