The article is devoted to the problem of diagnosis and treatment strategy of Buerger’s disease rarely found in the expert and clinical practice, that is inflammatory disease of unknown etiology, affecting mainly small and medium arteries and veins of limbs. Vascular surgeons around the world have been solving this problem for many years, both in terms of timely diagnosis of this disease and its proper pathogenic treatment. The authors of the article described an expert case of Buerger’s disease larvated course in 15-years-old girl, which primarily was mistakenly assessed by specialists as iatrogenic pathology of right forearm vessels in injecting aminazin solution that, according to the clinicians’ opinion, led to dry gangrene formation of right wrist and its subsequent amputation. The results of the forensic histological study and retrospective analysis of all child’s medical documents allowed to correctly diagnose this rare pathology but only on the stage of commission forensic medical examination in the framework of the initiated criminal proceeding against several leading medical organizations in Saint-Petersburg with a pediatric profile. The authors noted the role of routine medical manipulation in manifestation of larvated pathologic process in a teenage girl in addition to full health and well-being. The objective of present article is devoted to understanding this problem.