Fig 6. Posttreatment changes after surgery and radiation therapy.
A, Axial postcontrast T1WI shows an ill-defined, mildly enhancing mass at the region of the ethmoidal sinuses. Recurrence was suspected.
B, ADC map shows high signal intensity at the site of the lesion denoting posttreatment fibrous tissue, which was proved by biopsy. The mean ADC value at the site of the posttreatment changes was 1.89 ± 0.19 x 10–3 mm2/s.