{
  "abstract": "Primary breast angiosarcoma is an exceptionally rare malignancy, particularly in elderly patients, and may closely resemble benign vascular lesions on imaging and core needle biopsy. We report a case of low-grade primary angiosarcoma in a woman in her late 70s, initially misdiagnosed as a haemangioma despite interval tumour growth. A definitive diagnosis was achieved only after wide local excision, which demonstrated well to intermediately differentiated angiosarcoma with clear margins. Given the limited evidence supporting adjuvant therapy in low-grade disease, surgery alone was appropriate, and the patient remains recurrence-free at 2.5 years. This case highlights the diagnostic challenges and importance of maintaining suspicion in older adults.",
  "authors": [
    {
      "affiliations": [
        "Surgery, Matsunami General Hospital, Hashima District, Gifu Prefecture, Japan"
      ],
      "name": "Fumika Hanatate"
    },
    {
      "affiliations": [
        "Surgery, Matsunami General Hospital, Hashima District, Gifu Prefecture, Japan"
      ],
      "name": "Chika Yumura"
    },
    {
      "affiliations": [
        "Surgery, Matsunami General Hospital, Hashima District, Gifu Prefecture, Japan"
      ],
      "name": "Maiko Sugimoto"
    },
    {
      "affiliations": [
        "Pathology, Matsunami General Hospital, Hashima District, Gifu Prefecture, Japan"
      ],
      "name": "Keisuke Kawashima"
    }
  ],
  "title": "Primary low-grade breast angiosarcoma initially misdiagnosed as a benign vascular lesion",
  "uid": "90d59df8-e54b-500e-958c-b1c14cf9181a"
}