Parasitised large intestinal diverticulum of the spermatic cord.

We present a 70-year-old male patient with an unusual incidental finding at an elective repair of an indirect left inguinal hernia (LIH). A black nodule resembling a melanoma metastasis in a lymph node was discovered attached to the spermatic cord. There was no contiguity with the large bowel on the same side. Histological examination showed an isolated, detached colonic diverticulum containing a faecolith. We postulate derivation from an incarcerated colonic diverticulum that became 'parasitised' onto the spermatic cord.