Case Report: A Rare Case with Cutaneous Metastasis of Bladder Urothelial Carcinoma

Bladder cancer is a common genitourinary malignancy with variable metastatic potential. Cutaneous metastasis is uncommon and often presents with a poor prognosis. We presented a 47-year-old man with a history of muscle-invasive urothelial carcinoma of the bladder and suffered from headache and right arm swelling that had persisted for months. The excisional biopsy of the skin lesions and scalp tumor showed high-grade metastatic carcinoma of urothelial origin. Even though is rare, cutaneous metastasis is still the possibility of urothelial carcinoma metastasis and mimics several types of skin lesions. There is no guideline for cutaneous metastases of urothelial carcinoma because of the small number of patients and poor prognoses. Chemotherapy remains the treatment of choice, and further studies are needed to assess the efficacy of immunotherapy for skin metastases of urothelial carcinoma.