Pituitary Neuroendocrine Tumors Extending Primarily Below the Sella and into the Clivus: A Distinct Growth Pattern with Specific Challenges. - Sannwald, Lennart W.; Kreße, Nina; Grübel, Nadja; Knoll, Andreas; Roßkopf, Johannes; Hlavac, Michal; Wirtz, Christian R.; Pala, Andrej (Current Oncology, 2026)