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Egyptian Journal of Neurosurgery
Fig. 4 | Egyptian Journal of Neurosurgery

Fig. 4

From: Congenital agenesis of lumbo-sacral pedicles with associated anomalies: case report with an emphasis on the use of O-arm, navigation in the management with literature review

Fig. 4

a During intraoperative exploration in case 2 a conjoint nerve root at left L5 level (type 2b-Neidre and MacNab) with absent S1 pedicle on left was found. b Intraoperative O-arm and CT navigation picture showing placement of screws. The left S1 screw was placed using a lower entry point and divergent direction towards the sacral ala

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