Primary osteosarcoma of the urinary bladder treated with external radiotherapy in a patient with a history of transitional cell carcinoma: a case report.

Introduction: Primary osteosarcoma is one of the rare tumors affecting the urinary bladder. The occurrence of osteosarcoma in a patient with a long history of transitional cell carcinoma of the bladder is even more uncommon.

Case Presentation: We present the case of a 74-year-old Greek man who was diagnosed with osteosarcoma 10 years after he had been diagnosed with transitional cell carcinoma of the bladder from which he had been free from recurrences for the past three years.

Leiomyosarcoma as a second metachronous malignant neoplasm following colon adenocarcinoma. A case report and review of the literature.

Long-term cancer survivors are at increased risk for the development of second primary malignancies. This is usually associated with common genetic and etiologic factors and the treatment modality used for the primary cancer. In this paper we describe the case of a patient who developed a leiomyosarcoma in his left arm 5 years after he had a colon adenocarcinoma resected.