Proliferating trichilemmal tumor (PTT) is a rare but morphologically distinct tumor that usually arises on the scalp of elderly women. It is composed of multiple cysts consisting of squamous epithelium with trichilemmal keratinization without granular layer interposition. Vulvar proliferating trichilemmal cyst is very rare, with, to the best of our knowledge, only 3 cases previously reported in the literature. We describe a 39-year-old woman with recurrent PTT on the left labium majus of the vulva, which had been excised from the same side 5 years before. She had a palpable nodule, approximately 2 cm in size, which was firm, mobile, and nontender; without erythema and ulceration; and covered by normal skin on the vulva. There was no inguinal lymphadenopathy. The lesion was removed by wide surgical excision; because of the tissue elasticity, primary closure was possible. The pathology result was reported as proliferating trichilemmal carcinoma with tumor-free margins. Although local recurrence after wide excision is rare, we recommend complete excision for treatment of PTT and long-term follow-up because of the possibility of recurrence.

译文

:增生性三腕膜肿瘤(PTT)是一种罕见的但形态上明显不同的肿瘤,通常出现在老年妇女的头皮上。它由鳞状上皮组成的多个囊肿组成,具有三足动物的角质化作用,无颗粒层插入。外阴增生性三腕膜囊肿非常罕见,据我们所知,文献中仅报道了3例。我们描述了一个39岁的女性,其外阴左唇唇上有反复的PTT,这是5年前从同一侧切除的。她有一个明显的结节,大小约2厘米,结实,活动且不嫩。没有红斑和溃疡;并被外阴的正常皮肤覆盖。没有腹股沟淋巴结肿大。通过广泛的外科手术切除病变。由于组织的弹性,可以进行初次闭合。据报道该病理结果为具有无肿瘤切缘的增殖性三叶膜癌。尽管广泛切除后局部复发很少见,但由于复发的可能性,我们建议完全切除以治疗PTT和长期随访。

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