PMC8182168_01
(a) Magnification in hematoxylin-eosin staining x 10: retro-gastric
mass biopsy: tumor proliferation with small round cells arranged
in diffuse layers, separated by thick fibrous spans; (b)
magnification in hematoxylin-eosin staining x 40: small tumor
cells with a high cytoplasmic ratio, the nuclei are
hyperchromatic with some mitosis patterns, the cytoplasm is
sparsely abundant; (c) CD 99 positivity in tumor cells
(magnification x40).
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The anatomic pathology examination concluded a relapse of her ES for both the sites (Figure 1).
MRI T1 sequence, axial cut: (a) retro gastric mass in contact with
the tail of the pancreas in distinctly hyposignal T1 and
measuring 4.41 x 1.51 cm in its greatest diameter; (b) MRI T1
Fat-Sat sequence, axial cut: retro-gastric mass in contact with
the tail of the pancreas presents an intermediate signal; (c)
MRI T1 Fat-Sat Gadolinium, axial cut: spiculated fibrous mass
with a transverse thickening at the gastric post side, this mass
presents a peripheral enhancing.
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T1 and T2 with non-gadolinium-enhancing (Figures 2 and 3). These findings invoked a fibrous lesion.
Axial cut: retro-gastric mass in contact with the tail of the
pancreas in distinctly hyposignal T2.
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T1 and T2 with non-gadolinium-enhancing (Figures 2 and 3). These findings invoked a fibrous lesion.
Specimen of caudal splenopancreatectomy, showing the tail of
pancreas and the spleen resected in monobloc.
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We performed an excision of the tumor with distal pancreatectomy and splenectomy (Figure 4).
Magnification in hematoxylin-eosin staining x 20: (a)
fibro-hemorrhagic areas of the peripancreatic parenchyma without
detectable tumor residue. Magnification in hematoxylin-eosin
staining x 20; (b) deposition of hemosiderin in a mononuclear
inflammatory infiltrate. Magnification in hematoxylin-eosin
staining x 20; (c) extensive hemorrhagic areas in the presence
of ectatic vessels in a fibrous stroma. Magnification in
hematoxylin-eosin staining x 20; and (d) no evidence of tumor
proliferation in the pancreatic and peripancreatic
parenchyma.
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The anatomic pathology examination concluded a complete therapeutic effect within the resected mass (Figure 5).