Radiologic evaluation of the fossa navicularis: incidence, morphometric features, and clinical implications

Adanır, Saliha Seda; Bahşi, İlhan; Orhan, Mustafa; Kervancıoğlu, Piraye; Beğer, Orhan; Yalçın, Eda Didem

doi:10.1007/s00276-021-02742-5

Cited by 2 publications

(12 citation statements)

References 28 publications

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“…14 The incidence of FN reported in the literature differs from each other. 1 It has been reported that the incidence of FN may vary according to races and sex in the current studies. 13,22 Bayrak et al 5 have reported that FN incidence did not differ significantly between sexes.…”

Section: Incidence Of Fnmentioning

confidence: 58%

“…As a result, a diverticulum, also called Thornwaldt bursa or pharyngeal bursa, is formed in the midline, covered with pharyngeal mucosa. 1,2. The FN lies anterior to the pharyngeal bursa and pharyngeal tubercle 2,6,7.…”

Section: Etiology and Clinical Significancementioning

confidence: 99%

“…Infections can spread from the pharynx toward intracranial structures, and also due to its proximity to the nasopharynx and sphenoid sinus local or metastatic tumors may grow. Anecdotally adenoid retention cyst, adenoid hypertrophy, Rathke pouch cyst, Thornwaldt cyst, sphenoidal sinus mucocele dermoid teratoma of the posterior nasopharyngeal wall have been described to invade as well 1–3. One of these variations is the fossa navicularis (FN) 3,5.…”

mentioning

confidence: 99%

“…Anecdotally adenoid retention cyst, adenoid hypertrophy, Rathke pouch cyst, Thornwaldt cyst, sphenoidal sinus mucocele dermoid teratoma of the posterior nasopharyngeal wall have been described to invade as well. [1][2][3] One of these variations is the fossa navicularis (FN). 3,5 FN is defined as bony depression that is not always present and is located anterior to the foramen magnum and pharyngeal tubercle on the inferior aspect of the basilar part of the occipital bone.…”

mentioning

confidence: 99%

“…1,6 Although FN dimensions are variable, cases with a depth of 1.58-4.17 mm are reported in the literature. 1…”

mentioning

confidence: 99%

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Radiologic Evaluation of the Fossa Navicularis on Dry Skull: A Comparative CBCT Study

Adanır¹,

Bahşi²,

Kervancıoğlu³

et al. 2022

Journal of Craniofacial Surgery

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Fossa navicularis (FN) is defined as bony depression that is not always present and is located anterior to the foramen magnum and pharyngeal tubercle on the inferior aspect of the basilar part of the occipital bone. It has been reported that FN can create an infection spread path from the pharynx to the intracranial structures. Therefore, the diagnosis of this variation is important. Although cone beam computed tomography (CBCT) diagnostic accuracy has mostly been verified in detection and quantification particularly on human skulls, there is no study comparing morphometric measurements between direct measurement on the skull and CBCT measurement. The main object of this study is to evaluate the presence of FN on dry bones and CBCT images of the same dry skull and to examine the morphometric and morphological features of this formation. Thirtytwo random craniums that were made available for this study that did not have any fractures or deformities of the cranial base were examined. The sagittal diameter, transverse diameter, and depth of the FN was measured both directly on dry skulls and radiologically on CBCT images of dry skull. In addition, the shape of FN (SFN) was determined. FN was detected in 10 (31.25%) of 32 craniums examined with both modalities. It was determined that sagittal diameter of the FN, transverse diameter of the FN, depth of the FN, and the shape of FN did not show a statistically significant difference between the 2 measurements. Unlike the literature, FN was investigated on dry bones both directly and in CBCT images in this study. In contrast to previously thought the FN may be smaller according to this findings, and this small variation can be detected with CBCT images. According to this findings, it can be said that morphometric evaluations on CBCT are accurate and reliable, and CBCT is a safe method for clinical diagnosis and treatment.

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Section: Incidence Of Fnmentioning

confidence: 58%

Section: Etiology and Clinical Significancementioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

“…1,6 Although FN dimensions are variable, cases with a depth of 1.58-4.17 mm are reported in the literature. 1…”

mentioning

confidence: 99%

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Radiologic Evaluation of the Fossa Navicularis on Dry Skull: A Comparative CBCT Study

Adanır¹,

Bahşi²,

Kervancıoğlu³

et al. 2022

Journal of Craniofacial Surgery

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Prevalence And Morphometric Analysis Of Fossa Navicularis Magna In Dry Human Skulls

Tasleem¹,

Hina²,

Qureshi³

et al. 2023

JRMC

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Introduction: Basiocciput is the part of occipital bone present on the inferior aspect of skull. Fossa Navicularis Magna-an osseous defect is a variation in normal anatomy of basiocciput. Lately few case reports presented this fossa as a cause of spread of infection from nasopharynx to brain resulting in meningitis and osteomyelitis. Objectives: This study aims to find the incidence and morphometry of this fossa in Pakistani populace to avoid any misdiagnosis or misinterpretations. Materials & Methods: This study was conducted on dry human skulls at King Edward Medical University Lahore. Fossa was measured in its transverse and vertical diameters and to locate the fossa its distance from various anatomical land marks such as foramen ovale, foramen Lacerum, carotid canal, occipital condyles, pharyngeal tubercle and posterior border of vomer was noted. Results: The incidence of this fossa was found to be 5.3% in Pakistani population. Predominantly oval shaped, fossa measured 5.5 and 3.06 mm in vertical and transverse diameters respectively. It was 12.2 mm posterior to vomer and 5.9 mm anterior to pharyngeal tubercle. Conclusion: This study is useful for radiologists and clinicians in avoiding any misinterpretations on radiographs and unnecessary investigations

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Radiologic evaluation of the fossa navicularis: incidence, morphometric features, and clinical implications

Cited by 2 publications

References 28 publications

Radiologic Evaluation of the Fossa Navicularis on Dry Skull: A Comparative CBCT Study

Radiologic Evaluation of the Fossa Navicularis on Dry Skull: A Comparative CBCT Study

Prevalence And Morphometric Analysis Of Fossa Navicularis Magna In Dry Human Skulls

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