Figure 1.

Summary of preoperative imaging examinations for patients (A) ¹⁸F fluoro-d-glucose positron emission tomography combined with low-dose computed tomography examination presents increased metabolism in the retroperitoneum and skull base; (B) Octreotide is highly ingested by the tumors at the skull base and retroperitoneum; (C) Six months after surgery, the uptake of the abdominal mass tumor disappears, with a slight uptake in the right frontal area; (D) Retroperitoneum mass was adjacent to the abdominal aorta, and the boundaries are unclear; (E) Mass at the right skull base invades the anterior cranial fossa and extraocular muscles.