Meacham syndrome

Meacham syndrome is an extremely rare congenital malformation syndrome characterized by a distinctive combination of congenital diaphragmatic abnormalities, genital anomalies, and cardiac defects. The condition was first described by Meacham and colleagues and primarily affects the diaphragm, genitourinary system, and cardiovascular system. Key features include diaphragmatic abnormalities (often presenting as a diaphragmatic hernia or eventration), complex genital malformations (particularly in 46,XY individuals who may present with female or ambiguous external genitalia due to disorders of sex development), and congenital heart defects. Pulmonary hypoplasia secondary to the diaphragmatic defect is a common and serious complication. The syndrome has been associated with lung hypoplasia, which can be life-threatening in the neonatal period. Cardiac malformations reported in affected individuals include various structural heart defects. The genital anomalies in 46,XY individuals may include streak gonads, absent or abnormal Müllerian and Wolffian duct derivatives, and ambiguous or female-appearing external genitalia. Some cases have also been associated with additional anomalies. Due to the extreme rarity of Meacham syndrome, there is no specific treatment, and management is supportive and symptom-based. Surgical intervention may be required for diaphragmatic hernia repair, cardiac defects, and genital anomalies. The prognosis is often poor, particularly in cases with severe pulmonary hypoplasia and complex cardiac malformations, with many affected individuals dying in the neonatal period. Multidisciplinary care involving neonatology, pediatric surgery, cardiology, and genetics is essential for affected patients.

Common questions about Meacham syndrome