hiatus

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Related to Sacral hiatus: sacral canal
References in periodicals archive ?
Both the above types were considered as normal and the sacral hiatus was present against 5th and 4th sacral segments.
Location of the apex of sacral hiatus in relation to level of sacral vertebra varied from S2 to S5 vertebra level.
10) In our study, we included children between 1-6 years of age as there is difficulty in identifying caudal epidural space in children greater than 7 years due to the fusion of sacral vertebrae and reduction in the size of sacral hiatus.