Magnetic Resonance Imaging versus Computed Tomography and Different Imaging Modalities in Evaluation of Sinonasal Neoplasms Diagnosed by Histopathology

Abstract

ObjectiveThe study purpose was to detect the value of magnetic resonance imaging (MRI) compared to computed tomography (CT) and different imaging modalities as conventional radiology in evaluation of sinonasal neoplasms diagnosed by Histopathology.MethodsThirty patients (16 males and 14 females) were complaining of symptoms related to sinonasal tract. After thorough clinical and local examination, the patients were subjected to the following: conventional radiography, CT, MRI, and histopathological examination.ResultsThe nasal cavity was the most commonly involved site with sinonasal malignancies followed by the maxillary sinuses. The least commonly affected site was the frontal sinuses. Benign sinonasal tumors were present in 14 cases. The most common benign lesion was juvenile nasopharyngeal angiofibroma (6 cases), followed by inverted papilloma (3 cases). While malignant sinonasal tumors were present in 16 cases, squamous cell carcinoma was present in 5 cases, and undifferentiated carcinoma, in 3 cases. Lymphoepithelioma and non-Hodgkin lymphomas were present in 2 cases each, while adenocarcinoma, chondrosarcoma, adenoid cystic carcinoma, and rhabdomyosarcoma were present in 1 case each.ConclusionMRI with its superior soft tissue contrast and multiplanar capability is superior to CT in pretreatment evaluation of primary malignant tumors of sinonasal cavity.

Comparison of endoscopic and external resections for sinonasal instestinal-type adenocarcinoma

“…Previous studies showed that a clear delineation of anterior skull base and dural infiltrations was difficult to achieve even with MRI. In a comparative study of imaging findings and histopathological examination of patients with benign and malignant tumours, Gomaa et al demonstrated that false positivity was observed for CT scan in the ethmoid sinus analysis [23]. Our results about malignant tumours are consistent with this study, as imaging sensibility for cribriform plate involvement was 65.5 % in our study.…”

Evaluation of the Outcome of Lung Nodules Missed on 18F-FDG PET/MRI Compared with 18F-FDG PET/CT in Patients with Known Malignancies

“…Because of a higher accuracy in TNM staging than either PET or CT alone (2), integrated 18 F-FDG PET/CT has been implemented in the staging routine of a growing number of tumor entities and is regarded as the standard of reference by many authors (3)(4)(5). MRI, on the other hand, offers a sensitivity superior to that of CT concerning infiltration of the primary tumor into adjacent organs and detection of metastasis to parenchymatous organs such as the liver, brain, or kidneys (6)(7)(8). In addition, MRI provides valuable functional information from quantitative and multiparametric imaging (9).…”

Advances in recurrence and malignant transformation of sinonasal inverted papillomas

“…The use of computed tomography (CT) and magnetic resonance imaging (MRI) is critical for preoperative prediction of SIP attachment sites and differentiation (31,32). Radical ablation of SIP attachment sites is crucial for the first surgical resection.…”

“…Accurate tumor mapping is likely to be challenging due to inadequate differentiation of the tumor from pathological inflammation (36) and squamous cell carcinoma (32). MRI may have an advantage in differentiating soft tissue.…”

“…Currently, there are no distinct clinical signs and symptoms that differentiate SIP and malignant transformation of SIP (2,32). The diagnosis of SIP malignant transformation is based on the observation of synchronous transformation, which appears at the same time as papilloma, and metachronous transformation, which appears at the site of a previous papilloma (41).…”