Case Report: Tumor-to-tumor metastasis: a rare case of prostate adenocarcinoma metastasis to lung squamous cell carcinoma in a patient with multiple primary malignancies

This case report presents a rare and intriguing instance of TTM, specifically describing prostate adenocarcinoma metastasizing to a primary lung squamous cell carcinoma. The manuscript contributes valuable documentation to the limited literature on this rare phenomenon and is of potential interest to the oncology community.