Table 1.
Characteristics of the 13 patients who had undergone OA-PICA bypasses with a trans-CMF approach
| Case | Age/sex | Side | Site of aneurysm | Symptom | Surgical procedure | Reason of trans-CMF approach | Recipient artery/bypass | p/o bypass patency | p/o complication | mRS p/o > 1 year |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 55/F | R | Distal PICA | SAH (WFNS grade IV) | Bypass + Trap | caudal loop dissection | cranial loop/end-to-end | good | 2 | |
| 2 | 65/M | L | Proximal PICA | cerebellar infarction | Bypass + Trap | caudal loop dissection | cranial loop/end-to-side | good | 0 | |
| 3 | 82/F | L | VA-PICA | SAH (WFNS grade I) | Bypass + Trap | high position of caudal loop | caudal loop/end-to-side | good | 0 | |
| 4 | 82/M | R | VA-PICA | headache | Bypass + Trap | high position of caudal loop | caudal loop/end-to-side | good | transient dysphagia | 0 |
| 5 | 58/F | R | VA-PICA | cerebellar infarction | Bypass + Trap | high position of caudal loop | caudal loop/end-to-side | good | transient dysphagia | 0 |
| 6 | 38/M | L | proximal PICA and VA | Wallenberg synd. | Bypass + Trap | caudal loop dissection | cranial loop/end-to-end | good | 0 | |
| 7 | 70/F | R | VA (PICA involved) | incidental (TN) | Bypass + Proximal ligation | high position of caudal loop | caudal loop/end-to-side | good | 0 | |
| 8 | 44/M | R | VA (PICA involved) | neck pain | Bypass + Proximal ligation | high position of caudal loop | caudal loop/end-to-side | good | lateral medulla infarction | 1 |
| 9 | 69/F | R | VA-PICA | incidental (MCA AN) | Bypass + Trap | high position of caudal loop | caudal loop/end-to-side | good | 0 | |
| 10 | 54/F | R | VA (PICA involved) | Wallenberg synd. | Proximal ligation and wrapping | high position of caudal loop | caudal loop/end-to-side | occluded | 0 | |
| 11 | 75/M | L | VA (PICA involved) | incidental | Bypass + Proximal ligation | high position of caudal loop | caudal loop/end-to-side | good | 0 | |
| 12 | 59/M | L | VA (PICA involved) | lower cranial nerve palsy | Bypass + Proximal ligation | high position of caudal loop | caudal loop/end-to-side | good | posterior medulla infarction | 0 |
| 13 | 40/F | R | VA-PICA | SAH (WFNS grade I) | Bypass + Trap | high position of caudal loop | caudal loop/end-to-side | good | 0 |
AN: aneurysm, CMF: cerebellomedullary fissure, F: female, L: left, M: male, MCA: middle cerebral artery, mRS: modified Rankin Scale, OA: occipital artery, p/o: postoperative, PICA: posterior inferior cerebellar artery, R: right, synd: syndrome, SAH: subarachnoid hemorrhage, TN: trigeminal neuralgia, VA: vertebral artery, WFNS: World Federation of Neurological Surgeons.