PMC9663657_01
The abdominal CT showed patchy low-density shadow of the left pelvic wall soft tissue (A). The pelvic MRI showed that the lower part of the left psoas major muscle, the left pelvic wall and the left buttock were thickened with multiple high signal shadows (B). Colonoscopy showed multiple filling defects and local lumen stenosis in the terminal ileum, ileocecum and the beginning of the ascending colon (C). The pathological results revealed that a large number of proliferative ganglion cells and circuitous hyperplastic nerve fibers were found in the submucosa and muscular layer of the colon wall (D).
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F1
The imaging revealed a left PA (Figures 1A,B) Colonoscopy revealed mucosal stiffness and multiple polyps on the ascending colon (Figure 1C).