Dhattarwal, NSharma, RDivyashree, R2023-08-092023-08-092023-03Dhattarwal N, Sharma R, Divyashree R . Histoid Leprosy Presenting with Borderline Tuberculoid Leprosy in Type 1 reaction: An Uncommon Shift of Spectrum. Indian Journal of Leprosy. 2023 Mar; 95: 65-710254-9395http://imsear.searo.who.int/handle/123456789/222639Histoid leprosy is an uncommon variant of leprosy with characteristic clinical, immunological and bacteriological features and is considered to be a polar variant of lepromatous leprosy. Coexistence of other immunologically diverse forms of leprosy in histoid end of spectrum is very rare. We report a rare case of histoid leprosy on multi-drug therapy for last 7 months shifting to borderline tuberculoid spectrum in type 1 reaction or Wade’s contamination, spectral shiftHistoid LeprosyBorderline TuberculoidType 1 ReactionJournal ArticleIndiaDept. of Dermatology and STD, V.M.M.C. and Safdarjung Hospital, New Delhi 110029, India.Dept. of Dermatology, Venereology and Leprosy, Dr. R.P. Govt. Medical College, Kangra at Tanda (H.P.)- 176001, India.Dept. of Dermatology and STD, V.M.M.C. and Safdarjung Hospital, Delhi 110029, India