Deck Dominga Peirano, Magallón Miquela Martínez, Rengifo Marianne Kolbach
Department of Dermatology, Escuela de Medicina, Universidad de los Andes, Santiago, Chile.
Int J Trichology. 2025 Jan-Feb;17(1):64-65. doi: 10.4103/ijt.ijt_128_23. Epub 2025 Jun 23.
Acquired progressive kinking of the hair (APKH) is a rare condition in which the hair of the scalp changes in appearance. This disorder has been described infrequently over the years, so it is believed that it is being diagnosed late by physicians. We present a case of a patient with APKH.
A 13-year-old woman consulted for 8 months of evolution of changes on the appearance of her hair, being darker, thicker, and more brittle than usual. The physical examination reveals the presence of thick short hair and isolated long dark hair in the coronal area. Trichoscopy showed periodic reductions on the diameter of the hair shaft and no areas of alopecia suggestive of APKH.
APKH is an extremely rare condition in which hair of the scalp changes in appearance. It is very important to know the physical changes produced on the hair to avoid misdiagnosis. We report the case to make this pathology more widely known among professionals and encourage the reporting of this unusual disorder.
获得性进行性毛发扭结（APKH）是一种罕见的病症，头皮毛发外观会发生改变。多年来对这种疾病的描述并不常见，因此人们认为医生对其诊断较晚。我们报告一例APKH患者。
一名13岁女性因头发外观变化8个月前来就诊，其头发比平常更黑、更粗且更易折断。体格检查发现冠状区有浓密的短发和孤立的深色长发。毛发镜检查显示毛干直径有周期性变细，且无提示APKH的脱发区域。
APKH是一种极其罕见的病症，头皮毛发外观会发生改变。了解毛发产生的物理变化以避免误诊非常重要。我们报告此病例是为了让专业人士更广泛地了解这种病理情况，并鼓励报告这种不寻常的病症。
