title: Fossa navicularis magna.
abstract: A notchlike bone defect in the basiocciput due to a prominent fossa navicularis was incidentally discovered in a patient referred for radiologic evaluation of sinusitis. MR images showed that the osseous defect was filled with lymphoid tissue of the pharyngeal tonsil. The occurrence of this anatomic variant is discussed, with reference to ancient anatomic works.
authors.affiliation: Institute of Radiology, University of Verona, Italy.
authors.forename: A
authors.initials: A
authors.lastname: Beltramello
authors.forename: G
authors.initials: G
authors.lastname: Puppini
authors.forename: G
authors.initials: G
authors.lastname: El-Dalati
authors.forename: M
authors.initials: M
authors.lastname: Girelli
authors.forename: R
authors.initials: R
authors.lastname: Cerini
authors.forename: A
authors.initials: A
authors.lastname: Sbarbati
authors.forename: P
authors.initials: P
authors.lastname: Pacini
mesh_terms: D000328:Adult; D000716:Anatomy, Artistic; D005260:Female; D006801:Humans; D008221:Lymphoid Tissue / Q000473:pathology; D008279:Magnetic Resonance Imaging; D014066:Palatine Tonsil / Q000473:pathology; D010614:Pharynx / Q000473:pathology; D012852:Sinusitis / Q000175:diagnosis*; D019291:Skull Base / Q000002:abnormalities* / Q000000981:diagnostic imaging / Q000473:pathology*; D014057:Tomography, X-Ray Computed