PT  - JOURNAL ARTICLE
AU  - Beltramello, A
AU  - Puppini, G
AU  - El-Dalati, G
AU  - Girelli, M
AU  - Cerini, R
AU  - Sbarbati, A
AU  - Pacini, P
TI  - Fossa navicularis magna.
DP  - 1998 Oct 01
TA  - American Journal of Neuroradiology
PG  - 1796--1798
VI  - 19
IP  - 9
4099  - http://www.ajnr.org/content/19/9/1796.short
4100  - http://www.ajnr.org/content/19/9/1796.full
SO  - Am. J. Neuroradiol.1998 Oct 01; 19
AB  - 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.