Patokar Abhishek S, Holani Aditya R, Khandait Gaurav H, Khatu Swapna S
Department of Dermatology, SKNMC, Pune, Maharashtra, India.
Int J Trichology. 2022 Jan-Feb;14(1):31-33. doi: 10.4103/ijt.ijt_100_20. Epub 2022 Feb 1.
Eruptive vellus hair cyst (EVHC) is a rare follicular developmental abnormality of the vellus hair follicles. The usual onset is between 17 and 24 years but may be congenital. It can arise sporadically or may be inherited in an autosomal dominant fashion. They are caused by an abnormality at the infundibular level of vellus hairs. They usually appear as yellow to reddish-brown papules over the chest, limbs, and abdomen. Histologically, cyst has a stratified squamous epithelium and it contains lamellated keratin and several vellus hairs. We present this rare case of a 12-year-old male because of its unusual morphology and distribution and also to generate awareness about this rarely diagnosed condition. To the best of our knowledge, no case of an axillary variant of EVHC has been reported till date.
发疹性毳毛囊肿（EVHC）是一种罕见的毳毛毛囊发育异常。通常发病年龄在17至24岁之间，但也可能是先天性的。它可散发性出现，也可能以常染色体显性方式遗传。其病因是毳毛漏斗部水平的异常。通常表现为胸部、四肢和腹部出现黄色至红棕色丘疹。组织学上，囊肿有分层的鳞状上皮，包含板层状角蛋白和数根毳毛。我们报告这例12岁男性的罕见病例，因其形态和分布不寻常，同时也是为了提高对这种罕见病的认识。据我们所知，迄今为止尚未有发疹性毳毛囊肿腋窝变异型的病例报道。
