[A case of holoprosencephaly with parietal encephalocele].
Holoprosencephaly, as described by DeMyer, is a cerebral malformation in which the embryonic prosencephalon fails to divide into cerebral hemispheres. According to the degree of division in the prosencephalon, he classified holoprosencephaly into three types; alobar, semilobar and lobar type. We have experienced a case of holoprosencephaly with parietal encephalocele. The patient was admitted to our hospital 4 hours after birth because of parietal encephalocele. A radical operation was carried out and encephalocele was diagnosed histologically. After discharge from our hospital, his psychosomatic development was remarkably delayed. On Oct. 20, 1985, he was re-admitted for further examination. CT-scan and cerebral angiography showed characteristic findings. The classification of holoprosencephaly and dorsal cyst malformation is discussed. On encephalocele with holoprosencephaly, it is said that there may be an extra-calvarial extension of the dorsal sac or ventricular system. But, Hutchinson stated in his experience that first, a closure disorder of the neural tube caused encephalocele. And later a disorder of diverticularization produced the holoprosencephalic abnormality. He suggested that there were two independent disorders of organogenesis which might rarely occur in the same patient. We also reported a similar case of holoprosencephaly with parietal encephalocele which has some controversial problems.
Shiroyama
Y
Y
Department of Neurosurgery, Kokura Memorial Hospital, Kitakyushu, Japan.
Mitani
T
T
D000015:Abnormalities, Multiple / Q000000981:diagnostic imaging*; D001921:Brain / Q000002:abnormalities* / Q000000981:diagnostic imaging; D002533:Cerebral Angiography; D004677:Encephalocele / Q000150:complications* / Q000601:surgery; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D010296:Parietal Lobe; D014057:Tomography, X-Ray Computed