The first reported case of pigmented Bartholin duct cyst.

Bartholin duct cyst is a relatively common benign lesion occurring in the labia minora and is of urogenital sinus origin [1, 2]. Bartholin duct cysts arising from the main duct are lined by urothelial or squamous epithelium, whereas those originating from an acinus are covered by mucinous columnar epithelium [1, 2]. Albeit extremely rare, pigmentation in an external genital cyst, such as median raphe cyst, has been reported [3, 4]. However, presence of melanocytes or melanin pigment in the cyst wall of Bartholin duct cysts has not yet been documented. Herein, we report the first case of pigmented Bartholin duct cyst.