Conclusion
This case report highlights the importance of immunohistochemistry in identifying the primary site of origin in metastatic tumors, particularly in rare presentations such as signet-ring cell carcinoma metastasis to the testis. Further research and clinical trials are needed to establish the optimal treatment strategies for SRCC of the small intestine and to improve the prognosis for patients with this rare malignancy. Finally, lifestyle modifications should be considered to reduce the risk of developing cancer and other diseases.