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Black Veins: A Case of Minocycline-induced Pigmentation Post-Sclerotherapy and a Review of Literature.

J Cutan Pathol. 2016 Sep 28;

Authors: Star P, Choy C, Parsi K

Abstract
Minocycline-induced pigmentation (MIP) is an uncommon but well described adverse effect of oral minocycline treatment. MIP is clinically and histopathologically distinct from post-sclerotherapy pigmentation. We report a case of a patient presenting with blackened skin overlying veins recently treated with endovenous laser and foam sclerotherapy. The patient was a 44 year-old male with systemic sclerosis who commenced minocycline for the treatment of rosacea 5 months prior. Histological examination of the discoloured tissue and underlying vein revealed hemosiderin deposition in the dermis and pigmented macrophages within the subendothelial layer of the vein wall with a staining pattern consistent with MIP. Venous tissue has not previously been reported in the literature as a target of minocycline pigmentation. Our patient preferred to control his rosacea by continuing to take minocycline. Follow-up ultrasound examinations revealed the treated vessels to be fully occluded with no evidence of recanalization, residual flow or ongoing thrombophlebitis. Despite a good sclerotherapy outcome, the pigmentation did not subside over 2 years. This case demonstrates that oral minocycline may induce significant and potentially long-term pigmentation in predisposed patients undergoing sclerotherapy.

PMID: 27683017 [PubMed - as supplied by publisher]

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