Unilateral Ulnar Hemimelia with Humeroradial Synostosis and Oligodactyly: A Rare Congenital Limb Anomaly

Ulnar hemimelia (UH), a rare congenital skeletal condition, is frequently linked to other upper limb abnormalities and is characterized by the partial or total absence of the ulna. We describe a rare instance of a 12-year-old patient with unilateral UH, humeroradial synostosis, and oligodactyly. The patient presented with obvious left upper limb shortening and functional limitations. The absence of the ulna, fusion of the humerus and radius, and the underdeveloped digits were all verified by radiographic examination. This case emphasizes the phenotypic variability linked to UH and contributes to the small body of literature on such complex presentations. In order to improve function and quality of life, management prioritized physiotherapy, supportive care, and regular follow-up for possible surgical procedures. For the best outcomes, early detection and a multidisciplinary approach are crucial.