Figure 3. Serial ultrasonographic images of the jejunal mass at first presentation, 3, 5, 8, and 9 weeks (A–E) in case 2.

(A) At first presentation, the muscularis layer is circumferentially thickened (full thickness, 3.5 mm; muscularis thickness, 2.0 mm) without apparent mass formation. (B) At 3 weeks, the same mass is poorly marginated, eccentric intramural, and shows altered layering (arrowheads). Increased muscularis layer thickness (full thickness, 4.3 mm; muscularis thickness, 3.1 mm) is identified surrounded by hyperechoic mesentery tissue (asterisk) at the same level. (C, D) Up to the 8^th week, the mass changes in shape from eccentric to circumferential and is associated with an almost complete loss of the intestinal layering (arrows). (E) At 9 weeks, the jejunal mass changes to an ill-defined mixture of hypoechoic and hyperechoic areas with circumferential transmural mass growth (full thickness: 1.4 cm) and complete wall layering loss