| Phenotype details |
height SD -2.12, weight SD -0.67, OFC SD -2.24; motor delay; speech delay; mild intellectual disability; facial dysmorphism; no hearing loss; no endocrine anomalies; mild diffuse hypotonia, hyporeflexia, possible mild muscle weakness, intention tremor of upper extremities, intermittent exotropia, slow gait with trace circumduction at left hip; 4y-normal electromyogram, normal nerve conduction study; MRI brain lesions of the periaqueductal gray matter, thalami, substantia nigra, and geniculocalcarine tract at 17 months; periaqueductal gray matter lesions had resolved by age 4 years, whereas other lesions remained stable; pectus excavatum, fifth finger clinodactyly, broad great toes, cutis marmorata, 7y-subtle retinal pigmentary changes |