FIGURE 1.

Mesenteric inflammatory myofibroblastic tumour. Axial (a, b) and coronal (c) contrast enhanced CT images of the abdomen in a 14-year-old girl reveal multiple well-circumscribed heterogenously enhancing nodular lesions in the mesentery indenting the dome of the urinary bladder. The lesions have a peripheral enhancing rim and central non-enhancing core. Few foci of punctate calcification (white arrow) are observed within one of the nodular lesions. Photomicrograph of the histopathological specimen on IgG4 immunochemistry (d) reveals spindle cells with areas of storiform fibrosis and infiltration by plasma cells (positive for IgG4).