Microcephaly-intellectual disability-phalangeal and neurological anomalies syndrome

Microcephaly-intellectual disability-phalangeal and neurological anomalies syndrome (also known as Filippi syndrome) is an extremely rare genetic disorder characterized by the combination of microcephaly (abnormally small head), intellectual disability, distinctive facial features, skeletal anomalies particularly affecting the fingers and toes, and neurological abnormalities. The condition is present from birth and affects multiple body systems including the central nervous system, the skeletal system, and craniofacial structures. Key clinical features include significant microcephaly, moderate to severe intellectual disability, short stature, and cutaneous syndactyly (webbing of the skin between fingers and/or toes), particularly affecting the third and fourth fingers. Affected individuals typically display characteristic facial features including a broad nasal bridge, thin lips, a high forehead, and small or underdeveloped teeth. Neurological manifestations may include seizures, abnormal muscle tone, and speech delay. Some patients may also exhibit behavioral abnormalities such as anxiety or agitation. Filippi syndrome follows an autosomal recessive inheritance pattern, meaning that both copies of the responsible gene must carry a pathogenic variant for the condition to manifest. Mutations in the CKAP2L gene have been identified as a cause of this syndrome. There is currently no specific cure or targeted therapy for this condition. Management is supportive and symptomatic, involving multidisciplinary care including developmental support, physical therapy, speech therapy, seizure management when needed, and surgical intervention for syndactyly if functionally indicated.

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