Introduction and importancePrimary breast angiosarcomas are endothelial derived breast sarcomas found in younger to middle age groups. The diagnosis of primary breast angiosarcoma in an octogenarian woman is a rare incidence.Case presentationWe report a case of 87-year-old postmenopausal woman presenting with history of lump in her right breast for four months. Ultrasound guided biopsy was performed which confirmed the diagnosis of angiosarcoma hence, subjected to simple mastectomy. She was doing quite well for one year when ultimately, she developed metastatic disease and couldn't survive more.Clinical discussionMicroscopically, these tumours are classified into grades I, II and III. Hematogenous route has been taken for metastasis having lungs being most involved. There are limited case reports and studies that have investigated the use of adjuvant radio/chemotherapy.ConclusionPrimary angiosarcoma of breast is a rare disease in old age group with limited treatment options which resulted in poor prognosis and early relapse.