Urinary bladder metastasis from primary lung cancer, a rare and challenging diagnosis: a case report

Bladder metastases are rare, representing only 2% of all bladder tumors, secondary bladder localization from a primary lung is exceptional. CASE PRESENTATION: The authors describe the case followed for lung adenocarcinoma with an exceptional metastatic site, which is the bladder. A computed tomography scan showed a left suprahilar bronchial tumor with pleurisy (Fig. 1A), which biopsies concluded to a moderately differentiated adenocarcinoma. The patient is treated with palliative cisplatin-based chemotherapy. And died 11 months after diagnosis. CLINICAL DISCUSSION: Bladder metastases are rare, representing only 2% of all malignant bladder tumors. Metastatic lesions of the bladder are generally revealed by hematuria. Confirmation of bladder invasion is immunohistochemical, facilitated by knowledge of the primitive. CONCLUSION: In the presence of any adenocarcinoma of the bladder, a thoracic-abdominal-pelvic computed tomography scan must be requested in search of a primary extra-vesical cancer who can facilitate the diagnosis.