Almeida Hiram Larangeira de, Nudelmann Lisia, Göebel Joice, Janovik Nathália, Hein Juliana
Universidades Federal e Catolica de Pelotas, Brasil.
An Bras Dermatol. 2011 Jul-Aug;86(4):789-90. doi: 10.1590/s0365-05962011000400027.
A 32-year-old male patient presented for 8 months an asymptomatic therapy-resistant acneiform eruption on his back and buttocks. Skin examination showed several inflammatory papules, which evolved to hyperpigmentation. At the same distribution non inflammatory papules, which resembled rice grains, were also observed. Light microscopy showed small keratin-filled cysts, with an epithelial multilayered wall, without granular layer. Keratin and some vellus hairs were identified inside the cyst, confirming the diagnosis of vellus hair cysts. Diagnosis of vellus hair cysts should be suspected in cases of multiple papules or therapy-resistant cases of acneiform eruptions.
一名32岁男性患者背部和臀部出现无症状且治疗抵抗的痤疮样皮疹8个月。皮肤检查发现数个炎性丘疹，后演变为色素沉着。在相同分布区域还观察到类似米粒的非炎性丘疹。光学显微镜检查显示小的充满角蛋白的囊肿，有上皮多层壁，无颗粒层。囊肿内发现角蛋白和一些毳毛，确诊为毳毛囊肿。对于多发性丘疹或治疗抵抗的痤疮样皮疹病例，应怀疑毳毛囊肿的诊断。
