Skip to main content
Egyptian Journal of Radiology and Nuclear Medicine
Fig. 6 | Egyptian Journal of Radiology and Nuclear Medicine

Fig. 6

From: Post-treatment benign changes versus recurrence in non-lymphoid head and neck malignancies: can diffusion-weighted magnetic resonance imaging end up the diagnostic challenge?

Fig. 6

Pathologically proven recurrent adenoid cystic carcinoma of the left maxilla following surgical resection and adjuvant chemoradiation. In this case, biopsy and histopathological examination revealed adenoid cystic carcinoma. However, the lesion was falsely diagnosed by diffusion-weighted imaging (DWI), i.e. wrongly interpreted as “post-treatment benign changes”. a Axial T2-weighted image (T2WI) showing a rather oblong sheet of high signal intensity at the operative bed (left maxilla). b Axial fat-saturated T1-weighted image (T1WI) post-contrast sequence showing faint, rather homogenous, enhancement of the lesion. c Diffusion-weighted imaging (b1000) revealing the intermediate-to-low signal intensity pattern of the lesion. d Apparent diffusion coefficient (ADC) map revealing the mixed, intermediate-to-high, signal intensity pattern of the lesion, with a mean ADC value of 1.39 × 10−3/mm2; possibility of post-treatment benign changes was considered

Back to article page