An incision extending medial to lateral through the lateral crus separating the lateral crus into a superior and an inferior portion.
由内向外延伸的切口，穿过外侧脚并将之分为上下两个部分。
2
This sign was most commonly seen. (2) Bony defect was well demarcated, usually its medial end was directly connected with the vestibule or common crus.