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case_images: Ultrasonographic images demonstrating the characteristics of the abdominal formation in different incidences. (A) Formation with heterogeneous aspect and irregular and ill-defined margins, permeated with several hyperechogenic spots; (B) and (D) Other incidences evidencing the anechoic center and hyperechogenic and irregular margins; (C) Doppler evaluation, with no evidence of vasculature in this incidence.
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case_images: The formation had an anechoic center and hyperechoic spots scattered around the margins (Figure 1).
case_images: Abdominal radiographs, showing the mass. (A) Ventrodorsal (VD - ventro-dorsal) view, evidencing the homogeneous formation in the medial and caudal abdominal regions (white arrows); (B) Right lateral view (LLD - latero-lateral direita); and (C) Left lateral view (LLE - latero-lateral esquerda), both showing the formation with homogeneous center and contour with menral radiopacity spots (white arrows).
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case_images: The primary differential diagnoses included neoplasia, granuloma, or abscess (Figure 2).
case_images: Macroscopic images of the formation, after surgical resection. (A) Structure removed during exploratory laparotomy; due to adherences, a jejunal segment was removed along with the formation; (B) Image exhibiting firm margins permeated with small mineral lesions and the center of hemorrhagic and necrotic material.
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case_images: The mass exhibited moderate adhesion to adjacent tissues, necessitating the removal of a jejunal segment (Figure 3).
case_images: Images exhibiting histological characteristics of the mass. (A) HE 40X; proliferation of neoplastic mesenchymal cells with multifocal to coalescent mineralization; (B) HE 100X; formation of frequently mineralized trabecular osteoid matrix; (C) HE 40X; presence of three distinct morphologic groups of mesenchymal cells: fusiform, chondroid and osteoid; (D) HE 400X; neoplastic cells with nuclear atypicalness associated with countless mitotic figures.
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case_images: The mass's central portion was characterized by extensive necrosis (Figure 4).
case_images: Ultrasonographic images, 27 days after surgery. (A) Image exhibiting free abdominal fluid (white arrows). (A) and (B) hyperechoic multifocal lesions scattered throughout the abdomen, with posterior acoustic shadowing (yellow arrows); (C) Liver presenting with permeated hyperechoic areas with posterior acoustic shadowing (blue arrows); (D) Increased echogenicity and heterogeneous aspect of fatty tissues.
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case_images: Abdominal effusion and signs of partial intestinal obstruction were also observed, potentially associated with post-surgical adhesions (Figure 5).
case_images: Thoracic radiographs, post-surgical staging (27 days). (A) Ventrodorsal view (VD - ventro-dorsal); (B) Right lateral view (LLD - latero-lateral direita); and (C) Left lateral view (LLE - latero-lateral esquerda), showing no evidence of metastasis.
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case_images: The thoracic radiographs revealed no evidence of metastasis (Figure 6).
case_images: Abdominal radiographs, post-surgical staging (27 days). (A) Ventrodorsal (VD - ventro-dorsal) view with multiple small mineral lesions diffusely distributed (blue circles), as well as a large amount of gas in some intestinal segments (white arrows), compatible with the ultrasound findings; (B) Right lateral view (LLD - latero-lateral direita); and (C) left lateral view (LLE - latero-lateral esquerda), complementary to the first view.
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case_images: However, multiple multifocal mineral spots were discernible in the abdominal radiographs, corroborating the findings from the ultrasound images (Figure 7).
case_images: Necropsy pictures. (A) and (B) Whitened lesions (calcifications) of several dimensions, dispersed throughout the abdominal cavity and parietal peritoneum.
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case_images: The necropsy confirmed the sonographic exam findings, revealing multiple mineral lesions diffusely scattered across the omentum, adhered to the parietal peritoneum, and within the hepatic parenchyma (Figures 8 and 9).
case_images: (Continued) Necropsy pictures. (A) Whitened lesions (calcifications) dispersed throughout the omentum; and (B) Similar lesions adhered to the muscle wall.
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case_images: The necropsy confirmed the sonographic exam findings, revealing multiple mineral lesions diffusely scattered across the omentum, adhered to the parietal peritoneum, and within the hepatic parenchyma (Figures 8 and 9).