Study of MR image for involvement of paranasal sinuses in 56 cases with nasopharyngeal carcinoma

Abstract

The nuclear magnetic resonance image (MRI) improved the positive rate of diagnosis in patients with nasopharyngeal carcinoma (NPC) and paranasal sinuses infringed, recently. But the reports about MRI features for involvement of paranasal sinuses in NPCs were less. In the study, the MRI features of 56 patients with NPC and paranasal sinuses infringed were evaluated between December 2003 and August 2004. And that would be propitious to therapy. Materials and methods Clinical dataFifty-six NPC patients with paranasal sinuses infringed were reviewed. There were 42 males and 14 females. The age ranged from 14 to 79 years, and the mean age was 49.5 years. All patients were diagnosed by pathology, and made MRI check before therapy. MRI dataThe MRI data of 56 NPC patients saved in the PACStapionPM 3.0 image scan system, could be scanned at any moment. Study methodsAll patients made 1.5 T MRI check on their backs. The tier thickness of MRI scan was 6 mm, and the space between tiers was 1 mm. All cases were gathered the enhanced MRI scan in sagittal section, coronal section and horizontal section, and gathered the T1W1, T2W1 MRI scan at the same time. By means of the tumour in involvement of sinus and sinuses wall, mucous membrane in sinuses, the encroaching routes were conjectured. We compared the positive rates of diagnosis in each scan lists. All the MRI scan results were read by one radiation doctor and two radiotherapy doctors. MRI diagnosis for involvement of paranasal sinusesTumour destroyed sinuses wall, or intruded into sinuses and lock-in sinuses in one MRI scan list. The whole tumour had the same signal. It showed equal signal or lower signal in T1W1 MRI scan. It showed equal signal or higher signal in T2W1 MRI scan. And it showed obvious enhancement in the enhanced MRI scan. Statistical analysisThe positive rates of paranasal sinuses infringed in each MRI scan list were compared by χ 2 test. While P < 0.05, it was positive in statistical analysis.Abstract Objective: The aim of the study was to study the nuclear magnetic resonance image (MRI) feature for involvement of paranasal sinuses in patients with nasopharyngeal carcinoma (NPC). Methods: The MRI of 56 patients with NPC and paranasal sinuses infringed were evaluated between December 2003 and August 2004. Results: Among them, 56 (100%) showed breakage in the wall of paranasal sinuses, 29 (51.8%) had thick mucous membrane in sinuses, 36 (64.3%) showed tumour invasion sinuses, 55 (98.2%) connected with primary carcinoma with the lesion, and 14 (25%) stored up fluid in sinuses. On MRI scan technique, the positive ratios of diagnoses were 66.1%, 76.8%, and 98.2% respectively (P < 0.000) in the horizontal section, coronal section and sagittal section. And nearly 60% was in the T1W1 and T2W1, but 100% in strengthen scan. Conclusion: The findings of sinuses wall breakage, thick mucous membrane in sinuses, tumour invasion cavity connective mass, and same enhancement signal in MR image may indicate the paranasal sinuses involved by primary tumour. The sagittal sectio...

Paranasal sinus invasion suggested T4 classification of patients of nasopharyngeal carcinoma: A two‐center retrospective investigation

“…Any disagreements were resolved by consensus. The diagnostic criteria for paranasal sinus involvement were as follows: (a) the primary nasopharyngeal lesion intruded into the sinus and destroyed the sinus wall and (b) the lesion in the paranasal sinus had the same signal intensity characteristics as the primary lesion, presenting with an equal or lower signal in the T1‐weighted MRI scan, an equal or higher signal in the T2‐weighted scan, and an obvious enhancement in the enhanced MRI scan …”

Nasopharyngeal carcinoma with paranasal sinus invasion: the prognostic significance and the evidence-based study basis of its T-staging category according to the AJCC staging system

“…All images were evaluated independently, and disagreements were resolved by consensus. Diagnostic MRI criteria for the invasion of the paranasal sinuses included the following: (1) tumors that had invaded into the sinus cavity connected with a primary nasopharyngeal lesion and with bone destruction of the wall of the sinus (Figure 1 ) and (2) presentation with an equal or lower signal in the T1WI MRI scan, an equal or higher signal in the T2WI and an obvious enhancement in the enhanced MRI scan, with the same signal intensity characteristics as revealed in the primary lesion [ 2 , 10 ].

Figure 1 Image of tumor invasion into the sphenoid sinus in patient with NPC.

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A Crystallographic, EPR and DFT Investigations of a Novel Magnetically Silent Mono-atom Acetate-Bridged Binuclear Schiff Base-Copper(II) Complex

“…inuclear copper(II) complexes, the simplest examples of magnetically coupled systems with one unpaired electron per one metal centre, have been extensively studied for three decades with attempts to probe structuremagnetism relations taking into account broad existence of binuclear copper(II) centres in biologically relevant environments [1][2][3][4]. Both intra or intermolecular magnetic exchange phenomena are of interest within the theory of molecular magnetism, copper(II)-carboxylates as the foremost class of magnetically coupled systems explored until now have extremely allowed to generate great number of diverse magnetostructural informations and correlations [5][6][7][8][9][10][11][12][13][14][15][16][17][18].…”