Introduction: Lymphangioma circumscriptum (LC) is characterized by malformation of superficial lymphatics. Dermoscopy reveals brownish-yellow lacunae and white septa. In scrotal LC, gray and red areas are also noted. Treatment of LC is challenging because of its high recurrence. We herein report a case of scrotal LC that was successfully treated with topical sirolimus with dermoscopic assessment of the therapeutic response. Case presentation: A male patient presented with fluid-filled lesions on the scrotum after partial penectomy. Examination revealed multiple skin-colored vesicles containing serous fluid on either side of the scrotum. Dermoscopy showed brownish-yellow lacunae with white septa as specific patterns. A diagnosis of secondary LC was made based on the clinical and dermoscopic features, and the patient was treated with 0.1% topical sirolimus ointment. Discussion: Management of LC includes close follow-up. Sirolimus, by inhibiting cellular proliferation and angiogenesis, helps in the regression of vesicular lesions of LC. Furthermore, dermoscopy supports an accurate evaluation of the therapeutic response. Conclusion: Sirolimus is a promising topical agent in the treatment of LC. Dermoscopy comes handy in the evaluation of treatment response. Any residual lesions could be noted and treated accordingly.
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