A 2-year-old male presented to an orthopedic outpatient office due to a supination defect in both of his upper limbs. X-rays of the affected limbs revealed fusion of the proximal radioulnar joints indicating congenital radioulnar synostosis (CRUS). CRUS is abnormal development of the upper limbs occurring during weeks 3—7 of embryological development. Causes of CRUS include genetic syndromes and spontaneous mutations. Treatment options include nonoperative and surgical treatments, however, treatment is controversial due to a lack of clinical evidence. Proposed screening methods could help improve detection rates and improve clinical management. This report aims to increase awareness of CRUS and discuss evolving treatment options.
DiAngelis et al. (Sun,) studied this question.