MedGen

Autosomal dominant primary microcephaly-27 (MCPH27) is characterized by small head circumference apparent in early childhood and associated with global developmental delay manifest as delayed walking, inability to walk, impaired intellectual development, and poor or absent speech. Most patients have variable and nonspecific additional features, including facial dysmorphism, hypotonia, limb hypertonia, poor feeding, and distal skeletal anomalies. Brain imaging may show enlarged ventricles or gyral abnormalities, but most have normal imaging (Parry et al., 2021). For a general phenotypic description and a discussion of genetic heterogeneity of primary microcephaly, see MCPH1 (251200). [from OMIM]

Progressive myoclonic epilepsy-9 (EPM9) is an autosomal recessive disorder characterized by onset of myoclonic seizures between 6 and 7 years of age, with progression to falling and tonic-clonic seizures, severe action myoclonus, and neurologic decline. Diffuse muscle wasting and loss of subcutaneous fat are present (Damiano et al., 2015). For a discussion of genetic heterogeneity of progressive myoclonic epilepsy, see EPM1A (254800). [from OMIM]

An inherited susceptibility or predisposition to developing acquired partial lipodystrophy. [from MONDO]