[Microcephalus as the reason for visiting a regional referral neuropaediatric service].

Introduction: The first contact between the patient and clinician takes place when the former visits because of some health problem.

Patients And Methods: We carried out a review of the clinical records of children who had visited the Neuropaediatric Service because of, among other reasons, an isolated or associated microcephalus over a period of 12 years and 9 months. Factors that were considered included whether or not there was a cephalic perimeter below p3 and evidence of encephalopathy, as well as its prenatal, perinatal or postnatal origin, functional diagnoses and the aetiological diagnosis.

Results: In 58 cases (0.92%) out of a total number of 6257 children the visit was due to microcephalus. The mean age at the last visit was 3.9 years. In five children (8.6%) the cephalic perimeter was not below p3. No encephalopathy was found in 20 patients (34.4%) and 38 (65.5%) were seen to have encephalopathy, 37 with a prenatal origin: nine genetic, three disruptive and 22 unspecified. Functional diagnoses were as follows: mental retardation in 29 patients, infantile cerebral palsy in 18, autistic spectrum in four and epilepsy in four. Neuroimaging studies aided diagnosis in 13 cases, i.e. 43.3% of those carried out.

Conclusions: Visits to the doctor because of microcephalus, as well as in normal children, include the whole range of prenatal encephalopathies and are associated, ordered according to the frequency of occurrence, with mental retardation and with infantile cerebral palsy. Individual evaluation and clinical progression allow the orientation of each case. Neuroimaging is the most useful complementary examination for diagnostic purposes.