Background: Macrocephaly-cutis marmorata telangiectatica congenita (M-CMTC) is a newly described condition characterized by macrocephaly (megalencephaly), cutis marmorata telangiectatica congenita, macrosomia and/or asymmetric growth, central nervous system abnormalities and neurological manifestations.
Discussion: This condition is usually documented in the Genetics' literature but it has been scarcely disseminated among neurosurgeons. Sudden death of uncertain origin has been reported in children with M-CMTC. Hydrocephalus and tonsillar herniation often occur in this syndrome. The appearance of symptoms and signs of intracranial hypertension or of brain stem compression in M-CMTC patients may herald the development of irreversible neurological damage or death.
Illustrative cases: We report two children diagnosed with M-CMTC and hydrocephalus who were given a ventriculo-peritoneal shunt. In addition, one of them exhibited tonsillar herniation.
Conclusions: Given the high incidence of hydrocephalus and/or tonsillar herniation that occurs in M-CMTC, serial neuroimaging studies and neurosurgical referral seem to be warranted in children with this syndrome.