Bladder metastasis of nasopharyngeal carcinoma: A rare case report and literature review.

Metastatic tumors of the bladder predominantly originate from malignant tumors of adjacent organs (prostate, uterus, ovaries); metastases from distant organs (lungs, breasts) are relatively rare. Cases of nasopharyngeal carcinoma metastasizing to the bladder are extremely rare. To the best of our knowledge, this is the first pathologically confirmed case of nasopharyngeal carcinoma metastasis to the bladder in China. During follow-up, the patient first presented with unusual superficial changes, then developed urinary symptoms, and was finally diagnosed with nasopharyngeal carcinoma metastasis via bladder biopsy pathology and immunohistochemistry.