Metachronous isolated penile metastasis from sigmoid colon adenocarcinoma: A case report

Figure 1 Imaging examination. A and B: The right penile corpus cavernosum mass showed patchy enhancement changes in the venous phase, measuring approximately 12 mm × 10 mm × 9 mm; C: Ultrasonography shows an isoechoic area in the right penile corpus cavernosum with a clear boundary, measuring approximately 15 mm × 10 mm × 10 mm.

Figure 2 Tumor specimen and pathological examination. A: The mass measured approximately 15 mm × 10 mm × 10 mm, with a uniform grayish-white mass in section and a hard texture; B and C: In the corpus cavernosum, there were different-sized glandular ducts, the cytoplasm contained mucus, the nuclei were large and hyperchromatic, and the mitotic figures were visible (B: H.E. staining 15 ×), (C: H.E. staining 400 ×).

Figure 3 Immunohistochemical examination. A: Immunohistochemically, the tumor cells were positive for CDX2; B: Immunohistochemically, the tumor cells were positive for CK20; C: Immunohistochemically, the tumor cells were positive for Villin.