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Radiologic Practice. 2011, (11) Core

Imaging findings and differential diagnosis of primary malignant melanoma of nasal cavityChinese Full Text

LI Pei-ling,ZHAI Zhao-hua,WANG Ping,et al.Sichuan Provincial Key Laboratory of Medical Imaging,Department of Radiology,the Affiliated Hospital of North Sichuan Medical College,Sichuan 637000,P.R.China

Abstract: Objective:To investigate the imaging findings and differential diagnosis of primary malignant melanoma of nasal cavity.Methods:The imaging findings of 9 cases with primary malignant melanoma of nasal cavity proved by pathology were analyzed.Results:Axial unenhanced CT scan showed soft-tissue masses in 9 cases.The tumor displayed a homogeneous density（8 cases in unilateral nasal cavity and 1 case in bilaterial cavity） and irregular configuration without calcification on CT.There were 8 cases with invasion of adjoining structures and 2 cases with inhomogeneous apparent enhancement.MRI showed typical inhomogeneous high signal intensities on T1WI and inhomogeneous low signal intensities on T2WI in 1 case;and isointensity and slightly high signal intensities on T1WI and slightly high signal intensities on T2WI in 2 cases.There were 3 cases showing inhomogeneous apparent enhancement on both CT and MRI.Conclusion:Our results had shown that the primary malignant melanoma of nasal cavity had no specific CT manifestation.CT and MRI could well define the location of tumor,invasion of bone and the adjoining structures.MRI could be helpful for the diagnosis of typical primary malignant melanoma of nasal cavity.
Keywords：

Nasal cavity; Melanoma; Tomography,X-ray computed; Magnetic resonance imaging;

  • DOI：

    10.13609/j.cnki.1000-0313.2011.11.029

  • Series：

  • Subject：

  • Classification Code：

    R739.62

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