PMC10422985_01
Erect abdominal radiograph reveals significant dilatation of the intestine, as the red arrow shows.
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Erect abdominal radiograph (Figure 1) indicated the intestine was pneumatic, dilated, rigid, and stiff, with a tendency to straighten, spaces between the intestine walls were thickened, and gas distribution was uneven.
Endoscopic examination shows mucosal hyperemia, disappearance of vascular texture, and multiple ulcers.
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Colonoscopy (Figure 2) revealed numerous purulent masses and ulcers on the surface of the colon.
Colonic mucosal biopsy results show changes in the crypt structure and formation of crypt abscess.
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The pathology after colon biopsy (Figure 3) showed that the crypt structure had changed, and crypt abscess had formed.
Colon pathology shows gangliocyte is normal.
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Mucosal and muscular layer eosinophils < 5 / HP, and ganglion cells can be seen in the muscular layer (Figure 4).
MRI shows a solid mass on the left side of the pelvis, as the red arrow shows.
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We conducted sacrococcygeal magnetic resonance imaging (MRI) (Figure 5) and surgically removed the sacrococcygeal mass, then sent it for pathological examination after surgery.
Pathology of yolk sac tumor (moderate H&E staining) (A) S-D corpuscles; (B) vitreous corpuscles; immunohistochemistry (moderate H&E staining): (C) CK positive; (D) Glypican-3 positive; (E) PLAP positive.
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The pathological change was diagnosed as yolk sac tumor based on imaging, pathomorphology, and immunohistochemical results (Figure 6).