A developmental theory of the superior sagittal sinus(es) in craniopagus twins.
BACKGROUND
Based on the study of the vascular anatomy of craniopagus twins, and particularly that of Ladan and Laleh, a theory is hypothesised regarding the embryological formation of the sagittal sinuses.
The superior sagittal sinus develops in contact with the calvarium bone within the inter-periosteal leptomeningeal space following a signal from the midline of the telencephalic vesicle derived from a single prosencephalic one. The position of the falx cerebri and most likely in the deepest part, the corpus callosum, points to the position of this midline.
Department of Neuroradiology, CHU de Bicetre, Paris XI University, 78 rue du Général Leclerc, 94275, Le Kremlin-Bicetre, France. pierre.lasjaunias@bct.ap-hop-paris.fr
Pierre
P
Lasjaunias
Robert
R
Kwok
Peter
P
Goh
Kuan Ying
KY
Yeong
Winston
W
Lim
Soke Miang
SM
Chng
D001921:Brain / Q000002:abnormalities / Q000473:pathology; D002533:Cerebral Angiography / Q000379:methods; D002550:Cerebral Veins / Q000002:abnormalities / Q000196:embryology / Q000473:pathology; D003392:Cranial Sinuses / Q000002:abnormalities / Q000196:embryology / Q000473:pathology; D005333:Fetus / Q000002:abnormalities / Q000473:pathology; D006257:Head / Q000002:abnormalities / Q000473:pathology; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods; D008954:Models, Biological; D014428:Twins, Conjoined / Q000196:embryology / Q000473:pathology*