PMC7778187_01
A) computed tomography (CT) abdominal scan revealing a 4cm nonspecific retroperitoneal, preaortic lesion, between celiac trunk and superior mesenteric artery; B) CT-guided biopsy of the retroperitoneal mass
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F1
The abdominal CT scan revealed a 4cm nonspecific retroperitoneal, paraaortic lesion, between celiac trunk and superior mesenteric artery, suggestive of neuroendocrine tumor as the first possibility (Figure 1A). After multidisciplinary discussion, it was decided to perform a CT-guided biopsy of the lesion (Figure 1B).
the (99m) Tc-octreotide Scintigraphy with SPECT/CT showed no evidence of pathological tumor uptake of the retroperitoneal mass
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F2
The whole-body (99m) Tc-octreotide scintigraphy with SPECT/CT showed a paraaortic abdominal mass, but without evidence of pathological tumor uptake (Figure 2).
A) image of the microscopy of the biopsy suggestive of microorganisms; B) PAS-stain
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F3
Microscopic study of the sample demonstrated no atypia but a tissue with fibrosis, collagenization and presence of spongy-looking structures, suggestive of microorganisms (Figure 3).