GALARZA, Marcelo, YUN JONG, Hyoun, MERLO, Alicia et al.
The variations in vascular anatomy and cranial foramina have important implications for their accurately recognition as normal or pathological. The condylar vein exits the skull base through the condylar canal, communicating the jugular foramen and the condylar fossa. The main purpose of this report was to asses the prevalence and normal anatomical patterns of the condylar canal . Eighty-one cadaveric skull base specimens were retrospectively examined for the unilateral or bilateral presence or absence of the canal. In addition, the condylar canal was classified for its relationship with the sigmoid-lateral sinus, in two types: Intrasinus canal type and Retrosinus canal type. The condylar canal was found bilaterally in 25 skulls (30.8% ); unilaterally in 25 skulls (30.8%) and was absent in 31 specimens (38.2%). A higher prevalence of Intrasinus canal type was found (54.3% ). Although it was only identified 2 cases (2.4% ) of retrosinus canaltype, associated forms (4.9%) were discovered during examination. Of the unilateral cases, 14 cases were right sided and 11 cases were left sided (17.8% and 13.5% among all cases, respectively). The condylar canal has two anatomical patterns: intrasinus canal type and retrosinus canal type. This structure may have some clinical relevance, and it should not be misinterpreted as abnormal during image studies
Keywords: Oseous system; Occipital; Condilar canal; Emisary condylar venous.
Rev. chil. anat., 1998, vol.16, no.1, p.83-87. (Full text available in Spanish).