The association of bladder myeloid sarcoma and unclassified myelodysplastic/myeloproliferative disease

Abstract

Myeloid sarcoma of the urinary bladder is a rare disorder. We report a 71-year-old man with hematuria who had a diffuse myeloid sarcoma of the bladder. He was also under follow-up for unclassified myeloproliferative/myelodysplastic disorder, diagnosed two months before. Abdominal ultrasonography and computed tomography findings were normal. Diagnostic cystoscopy revealed patchy areas of mucosal swelling with hyperemia. Histopathological examination of biopsies demonstrated a neoplasm composed of blasts showing myeloperoxidase positivity by immunohistochemistry. To our knowledge, the current case is the first case of myeloid sarcoma in the urinary bladder without evidence of a mass lesion, with a concurrent diagnosis of unclassifiable myelodysplastic/myeloproliferative disease.

Keywords

• Myeloid sarcoma
• urinary bladder
• unclassified myelodysplastic/myeloproliferative disease