Table 1. Histopathology of patients, MRI signal intensity, and pattern of enhancement of studied cases.
| Histopathology | Number of patients | % | T1 WI | T2 WI | Pattern of enhancement |
|
|---|---|---|---|---|---|---|
|
Inflammatory disease
(12 cases, 50%) |
Acute and chronic sinusitis | 4 | 16.8 | Low (3 cases) High (1 case) |
High | Mild |
| Sinonasal polyposis | 2 | 8.3 | Mixed signal mainly low |
High | Moderate heterogeneous |
|
| Fungal sinusitis | 3 | 12.5 | Low | Low (2 case) Signal void (1 case) |
Moderate to Marked |
|
| Mucocele | 2 | 8.3 | Low | High | Faint peripheral | |
| Wegner's granulomatosis | 1 | 4.17 | Low | Mixed signal | Marked heterogeneous |
|
|
Benign tumors
(5 cases, 20.7%) |
Inverted papilloma | 3 | 12.5 | Intermediate to low SI | Mixed area of low and high SI |
Heterogeneous (convulated cribriform pattern) |
| Angiofibroma | 1 | 4.1 | Intermediate | Intermediate | Intense | |
| Fibromyxoma | 1 | 4.1 | Intermediate | Intermediate | Moderate Homogenous |
|
|
Malignant tumors
(7 cases, 29.3%) |
Squamous cell carcinoma | 3 | 12.5 | Intermediate | Intermediate (1case) High (1 case) Low (1case) |
Mild Homogenous (1 case) Heterogeneous (2 cases) |
| Adenoid cystic carcinoma | 1 | 4.17 | Intermediate | Intermediate | Moderate Homogenous |
|
| Esinthoneuroblastoma | 1 | 4.17 | Low | High | Heterogeneous | |
| Lymphoma | 1 | 4.17 | Intermediate | Intermediate | Heterogeneous | |
| Malignant melanoma | 1 | 4.17 | High | Low | Mild homogenous | |
| Total | 24 | 100 | – | – | – | |
Abbreviation: WI, weighted image.