Most probable cause for a 70 yr old man presenting with tes-ticular tumour is
**Core Concept**
Testicular tumors are a rare occurrence in elderly males, and when they do occur, they are often of non-gonadal origin. This phenomenon is attributed to the presence of a tumor that has metastasized to the testis from a primary site elsewhere in the body.
**Why the Correct Answer is Right**
The most common extragonadal source of testicular tumors in elderly males is the prostate. Prostatic carcinoma can metastasize to the testis via the bloodstream, leading to the formation of a secondary tumor. This phenomenon is known as a "collision tumor." The metastatic cells from the prostate can give rise to a variety of tumor types, including adenocarcinoma, squamous cell carcinoma, and small cell carcinoma.
**Why Each Wrong Option is Incorrect**
**Option A:** Lymphoma is a type of cancer that originates from the lymphatic system, but it is not the most common cause of testicular tumors in elderly males.
**Option B:** Germ cell tumors, such as seminoma and non-seminoma, are more common in younger males and are not typically associated with elderly males.
**Option C:** Yolk sac tumor is a rare type of germ cell tumor that is typically found in children and adolescents, not elderly males.
**Clinical Pearl / High-Yield Fact**
In elderly males, testicular tumors are often a sign of an underlying malignancy elsewhere in the body, particularly the prostate.
**Correct Answer: D. Prostatic carcinoma**