Fossa navicularis magna.
نویسندگان
چکیده
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.
منابع مشابه
Fossa navicularis magna detection on cone-beam computed tomography
Herein, we report and discuss the detection of fossa navicularis magna, a close radiographic anatomic variant of canalis basilaris medianus of the basiocciput, as an incidental finding in cone-beam computed tomography (CBCT) imaging. The CBCT data of the patients in question were referred for the evaluation of implant sites and to rule out pathology in the maxilla and mandible. CBCT analysis sh...
متن کاملPrevalence and morphometric features of fossa navicularis on cone beam computed tomography in Turkish population.
BACKGROUND The objective of this study is to determine the prevalence and morphometric features of fossa navicularis, a close radiographic anatomic variation of canalis basilaris medianus of the basiocciput, in a Turkish population using cone beam computed tomography (CBCT). MATERIALS AND METHODS The study group consisted of 723 patients (female: 420, male: 303) having CBCT scans. The patient...
متن کاملThe First Histological Analysis of the Tissues Lining the Fossa Navicularis: Insights to its Etiology
The fossa navicularis (FN) is an anatomical variant on the ventral surface of the basilar part of the occipital bone that, to date, has only been investigated in bone specimens. We aim to clarify the structure of the fossa navicularis by gross anatomical, radiological, and histological methods. The FN was found in the occipital bone of the Caucasian male cadaver. There was no bony or histologic...
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An anterior urethral valve is uncommon compared to a posterior urethral valve as a cause of lower obstructive uropathy. Furthermore, an anterior urethral valve in the fossa navicularis is extremely rare. We describe the case in a 6-year-old boy who presented with a split urinary stream. Endoscopy revealed an anterior urethral valve in the fossa navicularis, and we successfully incised the valve...
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Urethral calculus is a rare form of urolithiasis with an incidence lower than 0.3%. Most of urethral calculus present in posterior urethra, few in anterior urethra and only 4-11% found at fossa navicularis. Urethral calculi usually results from migration from bladder, upper tract or it may arise de novo. We report a 56-years old male with a large fossa navicularis stone leading to urethro-cutan...
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ورودعنوان ژورنال:
- AJNR. American journal of neuroradiology
دوره 19 9 شماره
صفحات -
تاریخ انتشار 1998