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Subtemporal Approach for Gross Total Resection of Retrochiasmatic Craniopharyngiomas: Our Experience on 30 Cases.
World Neurosurgery 2018 January
BACKGROUND: Surgical treatment of retrochiasmatic craniopharyngiomas is associated with higher rates of complications, mortality, failure of complete removal, and recurrence compared with craniopharyngiomas located elsewhere. These tumors lie behind the optic chiasm and when large can extend upward into the third ventricle and downward along the brain stem, making their adequate exposure challenging. Most of the proposed techniques either use a translamina terminalis route or require wide bony exposures. In this study, we assessed the feasibility of a subtemporal approach for achieving gross total resection of retrochiasmatic craniopharyngiomas.
METHODS: Thirty patients with retrochiasmatic craniopharyngioma underwent surgery via a subtemporal approach. The technique and surgical and preoperative and postoperative endocrinologic outcomes are described in detail.
RESULTS: Gross total resection was achieved in all cases. The average tumor volume was 7.59 mL. The average postsurgical observation time was 73.8 months. During this time, 3 recurrences were observed (10.7%). The perioperative mortality was 6.6%. The pituitary stalk was preserved in 13 cases. Partial preservation of the pituitary stalk did not offer any advantage in terms of pituitary function. No postoperative vision worsening or new fixed neurologic deficits were observed. Among the 22 patients with preoperative vision impairment, 18 reported a significant improvement. The most common abnormalities within the temporal lobe on the side of the exposure seen on control magnetic resonance imaging were mild temporal horn enlargement (13 cases) and T2 hyperintensity (7 cases).
CONCLUSIONS: A subtemporal approach can be an attractive alternative approach to accessing retrochiasmatic craniopharyngiomas. Outcomes are comparable to those associated with other widely used and time-consuming exposures.
METHODS: Thirty patients with retrochiasmatic craniopharyngioma underwent surgery via a subtemporal approach. The technique and surgical and preoperative and postoperative endocrinologic outcomes are described in detail.
RESULTS: Gross total resection was achieved in all cases. The average tumor volume was 7.59 mL. The average postsurgical observation time was 73.8 months. During this time, 3 recurrences were observed (10.7%). The perioperative mortality was 6.6%. The pituitary stalk was preserved in 13 cases. Partial preservation of the pituitary stalk did not offer any advantage in terms of pituitary function. No postoperative vision worsening or new fixed neurologic deficits were observed. Among the 22 patients with preoperative vision impairment, 18 reported a significant improvement. The most common abnormalities within the temporal lobe on the side of the exposure seen on control magnetic resonance imaging were mild temporal horn enlargement (13 cases) and T2 hyperintensity (7 cases).
CONCLUSIONS: A subtemporal approach can be an attractive alternative approach to accessing retrochiasmatic craniopharyngiomas. Outcomes are comparable to those associated with other widely used and time-consuming exposures.
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