DOI: http://dx.doi.org/10.18203/issn.2454-5929.ijohns20194604

Radiological profiles of nasopharyngeal anatomy as seen in computed tomography scans of normal patients undergoing brain scans for other neurological problems in Konkani population

Santhosh Kumar Rajamani, Nayanna Karodpati, Dilesh A. Mogre, Rashmi Prashant

Abstract


Background: Nasopharyngeal carcinoma arises from interactions between underlying genetic and racial predilection and variety environmental factors. It is locally aggressive and presents with occult cervical nodal metastasis. A thorough understanding of radiological regional anatomy of the nasopharynx in Indians particularly Konkani population is important for early detection of nasopharyngeal carcinoma.

Methods: Routine computed tomography of brain, head and neck for other neurological problems like stroke clearly delineates the loco-regional anatomy of the nasopharynx. Computed tomography (CT) images stored in the computer system were studied to delineate the normal loco-regional anatomy of nasopharynx with special reference to anatomical structure of fossa of Rosenmueller and to find out the normal dimensions of nasopharynx in Konkani population. Nasopharyngeal carcinoma is a hidden and cryptic killer with relatively higher incidence among young population. To develop a local screening CT program for earlier detection of this occult malignancy was another purpose of this endeavour.  

Results: Internal carotid artery lies at the depth of around 1 to 1.7 cm from floor of lateral pharyngeal recess (fossa of rosenmuller); this figure has to be borne in mind while doing invasive procedures of nasopharynx like biopsies and adenoidectomy.

Conclusions: Posterior pharyngeal wall thickness of more than 2.4 cm and adenoid mass extending to posterior margin of the medial pterygoid plate is suspicious of malignancy. A screening protocol of CT nasopharynx has been suggested as a fruit of this endeavour.


Keywords


Multidetector computed tomography, Nasopharynx, Anatomy, Nasopharyngeal carcinoma

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References


Renko M, Kristo A, Tapiainen T, Koivunen P. Nasopharyngeal dimensions in magnetic resonance imaging and the risk of acute otitis media. J Otol Laryngol. 2017;121(9):853-6.

Ward FW, McNicholas WT. Clinical prediction of the sleep apnea syndrome. Sleep Med. 1997;1(1):19-32

Todd TW. Integral growth of pace: I. The nasal area. Am J Orthdontia Oral Surg. 1936;22(4):321-34.

Hairfield WM, Warren DW. Dimensions of the cleft nasal airway in adults: a comparison with subjects without cleft. J Cleft Palate. 1989;1:9-13.

Bresolin D, Shapiro PA, Shapiro GG, Chapko MK, Dassel S. Mouth breathing in allergic children: its relationship to dentofacial development. Am J Orthod. 1983;83(4):334-40.

Fujioka M, Young LW, Girdany BR. Radiographic evaluation of adenoidal size in children: adenoidal-nasopharyngeal ratio. Am J Roentgenol. 1979;133:401-4.

Teresi LM, Lufkin RB, Vinuela F. MR imaging of the nasopharynx and floor of the middle cranial fossa—part I: Normal anatomy. Radiology. 1987;164:811-6.

El-Anwar MW, Ali AH, Elnashar I, Elfiki IM, Ahmed AF, Abdulmonaem G. Normal Nasopharyngeal Measurement by Computed Tomography in Adult. J Craniofac Surg. 2017;28(4):395-8.

Oon CL. Some sagittal measurements of neck in normal adults. Br J Radiool. 1964;1(37):674-7.

Øyvind H, Harper David AT, Ryan Paul D. PAST: Paleontological statistics software package for education and data analysis. Palaeontologia Electronica. 2001;4(1):9-10.

Mancuso AA, Bohman L, Hanafee W, Maxwell D. Computed Tomography of the Nasopharynx: Normal and Variants of Normal. Radiology. 1980;137:113-21.

Feinstein AR. Clinical epidemiology the architecture of clinical research. Philadelphia; Saunders publishers: 1985;10:111-45.

Teresi LM, Lufkin RB, Vinuela F. MR imaging of the nasopharynx and floor of the middle cranial fossa-part I: Normal anatomy. Radiology. 1987;164:811-6.

Chong VFH, Fan YF. Radiology of the nasopharynx: Pictorial essay. Aust Radiol. 2000;44:5-13.

Mancusco AA, Harnsberger HR, Muraki AS, Stevens MH. Computed tomography of cervical and retropharyngeal lymph nodes: Normal anatomy, variants of normal, and applications in staging head and neck cancer. Part I. Normal anatomy. Radiology. 1983;148:709-14.

Mukherji SK, Weissman JL, Holliday R. The pharynx. In Head and Neck Imaging;H, C, Ed.; Mosby: New York, 1996;6:437-488.

Bloch S, Danziger J. Radiological experience with nasopharyngeal masses. J South African Med. 1973;47:2380-3.

Dickson RI, Flores AD. Nasopharyngeal carcinoma:an evaluation of 134 patients treated between 1971-1980. Laryngoscope. 1985;95:276-88.

Zeng Y. Seroepidemiological studies on nasopharyngealcarcinoma in China. Arch Cancer Res. 1985;44:121-38.

Woo J, Sham CL. Diagnosis of nasopharyngeal carcinoma. Ear Nose and Throat Journal. 1990;69:241-2.

Lam WW, King AD, Ahuja AT, Metreweli C. Imaging. In: vanHasselt CA, Gibb AG(eds). Nasopharyngeal carcinoma, 2nd edn. Hong Kong: Chinese University Press; 1999: 127-160.

Waldron J, Kreel L, Metreweli C, Woo JKS, Van Hasselt CA. Comparison of plain radiographs and computed tomographic scanning in nasopharyngeal carcinoma. Clin Radiol. 1992;45:404-6.