Pituitary neuroendocrine tumor with transsellar anastomosis concomitant with internal carotid artery agenesis: illustrative case.

Ryosuke Tashiro; T. Kawaguchi; Kentaro Izumi; Tomohisa Ishida; Hirofumi Watanabe; Yuto Yamazaki; Hidenori Endo

doi:10.3171/case25976

March 23, 2026

Pituitary neuroendocrine tumor with transsellar anastomosis concomitant with internal carotid artery agenesis: illustrative case.

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Key Points

This case aims to highlight the association of PitNET with unilateral internal carotid artery agenesis and its implications.
Detailed imaging using digital subtraction angiography to identify vascular supply
Surgical resection technique emphasizing preservation of the arachnoid plane
Total resection of the tumor while maintaining endocrine function
Successful identification of transsellar anastomosis as the sole vascular supply
Total resection achieved without compromising endocrine function
This case serves as the first reported instance of such an association

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Implication

Illustrative case reveals unique vascular supply challenges in a patient with ICA agenesis, suggesting the importance of detailed imaging.

Abstract

This first reported case of PitNET associated with unilateral ICA agenesis highlights the critical role of DSA in identifying transsellar anastomosis as the sole vascular supply to the pituitary gland. Precise preservation of the arachnoid plane enabled total resection with intact endocrine function. https://thejns.org/doi/10.3171/CASE25976.

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Tashiro et al. (2026) studied this question.

synapsesocial.com/papers/69c4ccc9fdc3bde4489185fc https://doi.org/10.3171/case25976

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Pituitary neuroendocrine tumor with transsellar anastomosis concomitant with internal carotid artery agenesis: illustrative case.

Key Points

Ask about this paper

Implication

Abstract

Discussion

Cite This Study

Pituitary neuroendocrine tumor with transsellar anastomosis concomitant with internal carotid artery agenesis: illustrative case.

Key Points

Ask about this paper

Implication

Abstract

Discussion

Cite This Study

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