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本文报告一种新的毛囊囊肿,其来源于毛母质和外根鞘。患者女,9岁时左胸上部出现豌豆大小、无触痛的囊性结节6个月。临床初步诊断为表皮囊肿。镜下病理变化:充满角质的囊肿位于真皮下部,并延伸到皮下脂肪层。囊壁下部由一层明显未成熟的嗜碱性细胞排列,核呈圆形、深嗜碱性而胞浆少。这些嗜碱性细胞的核逐渐消失,最终显示弱嗜酸性角化影细胞。相反,囊壁上部由具有透明胞浆
This article reports a new hair follicle cyst, which is derived from the hair matrix and the outer root sheath. The female patient, at the age of 9 years old, had cystic nodules of pea size and tenderness in the upper left chest for 6 months. Clinically diagnosed as an epidermal cyst. Microscopic pathological changes: The horny cyst is located in the lower part of the dermis and extends to the subcutaneous fat layer. The lower part of the cyst wall is lined by a layer of immature basophils with a round, deep basophilic nucleus and a small cytoplasm. The nucleus of these basophils gradually disappeared, eventually showing weak eosinophilic keratinocytes. In contrast, the upper wall of the capsule is made of transparent cytoplasm