Frontal fibrosing alopecia sparing a vascular naevus: the Renbök phenomenon

Nemazee, Leila; Harries, Matthew

doi:10.1111/ced.14501

Cited by 4 publications

(4 citation statements)

References 4 publications

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“…A woman with continued hair growth in a vascular nevus in an area otherwise affected by FFA has been recently described; the Renbök phenomenon describes how the emergence of one skin condition inhibits another [ 76 ].…”

Section: Aetiopathogenesismentioning

confidence: 99%

Frontal Fibrosing Alopecia: A Review

Porriño‐Bustamante

Fernández‐Pugnaire

Arias‐Santiago

2021

JCM

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Frontal fibrosing alopecia is a scarring alopecia, the prevalence of which is increasing worldwide since its first description in 1994. The reason for this emerging epidemic may be a higher exposure to an unknown trigger, although its aethiology and pathogenesis still remain enigmatic. Clinical, trichoscopic, sonographic, and histopathologic findings are allowing clinicians to understand more aspects about this type of cicatricial alopecia. Several treatments have been used in frontal fibrosing alopecia, although the 5-alpha reductase inhibitors seem to be the most promising. The aim of this report is to provide a compilation about the published data regarding frontal fibrosing alopecia in a narrative review.

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Section: Aetiopathogenesismentioning

confidence: 99%

Frontal Fibrosing Alopecia: A Review

Porriño‐Bustamante

Fernández‐Pugnaire

Arias‐Santiago

2021

JCM

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“…The authors suggested a mechanism related to the Renbök phenomenon. Previously, this phenomenon had been reported in the context of FFA sparing dermal melanocytic nevus and vascular nevus [ 5 , 6 ]. In the case of “the watch sign,” it could be related to pathological processes in the skin induced by pressure or temperature increase associated with the use of a wristwatch.…”

Section: Discussionmentioning

confidence: 79%

The ‘Watch Sign’ – Another Observation in the Course of Male Frontal Fibrosing Alopecia

Żółkiewicz,

Maińska,

Nowicki

et al. 2024

Dermatology Practical &Amp; Conceptual

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Section: Editormentioning

confidence: 99%

“…3 Renb€ ok phenomenon (inverse K€ obner phenomenon) refers to a clinical scenario in which the presence of one skin condition prevents the development of another. 4 Recently, Nemazee et al 5 reported it in a patient with FFA, in whom the area affected with vascular nevus was spared from cicatricial alopecia. Herein, we report two cases of patients with FFA sparing dermal nevi.The first patient was a 62-year-old woman (phototype II), with hypothyroidism, who presented to the outpatient clinic due to increasing regression of hairline in frontal and temporal areas associated with loss of eyebrows.…”

mentioning

confidence: 99%

Frontal fibrosing alopecia sparing a dermal melanocytic nevus: a report of two cases of Renbök phenomenon

Sławińska

Sokołowska‐Wojdyło

Sobjanek

et al. 2022

Acad Dermatol Venereol

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EditorFrontal fibrosing alopecia (FFA) is a type of primary scarring alopecia, which primarily affects postmenopausal women and is marked by progressive recession of frontotemporal hairline. 1 Despite growing incidence in the recent years, the potential triggering factors remain unclear. 2 Immunohistochemical studies show the role of immune system in disease pathogenesis. 3 Renb€ ok phenomenon (inverse K€ obner phenomenon) refers to a clinical scenario in which the presence of one skin condition prevents the development of another. 4 Recently, Nemazee et al. 5 reported it in a patient with FFA, in whom the area affected with vascular nevus was spared from cicatricial alopecia. Herein, we report two cases of patients with FFA sparing dermal nevi.The first patient was a 62-year-old woman (phototype II), with hypothyroidism, who presented to the outpatient clinic due to increasing regression of hairline in frontal and temporal areas associated with loss of eyebrows. The disease started 4 years previously. Based on clinical, trichoscopic and histopathological features, FFA was diagnosed. During clinical and histopathological assessment of the area involved by FFA showing a few lonely hairs, a dermal melanocytic nevus with preserved hairs was noted (Fig. 1a-e).Data sharing not applicableno new data generated.

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Frontal fibrosing alopecia sparing a vascular naevus: the Renbök phenomenon

Cited by 4 publications

References 4 publications

Frontal Fibrosing Alopecia: A Review

Frontal Fibrosing Alopecia: A Review

The ‘Watch Sign’ – Another Observation in the Course of Male Frontal Fibrosing Alopecia

Frontal fibrosing alopecia sparing a dermal melanocytic nevus: a report of two cases of Renbök phenomenon

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