luminal A breast cancer

{
  "id": "MLC-T-ONC-004972",
  "term": "luminal A breast cancer",
  "field": "Oncology and biomedicine",
  "definition": "A subtype of hormone receptor-positive breast cancer. Luminal A breast cancer cells typically have estrogen receptor (ER) and progesterone receptor (PR) proteins inside them and a small amount or none of a protein called HER2 on their surface. Luminal A breast cancer cells also tend to have low levels of a protein called Ki-67, which is found only in cells that are dividing. Under a microscope, luminal A breast cancer cells look more like normal cells than other subtypes of breast cancer. They tend to grow slowly and have a good prognosis. Most breast cancers are luminal A.",
  "references": [
    "NCI Dictionary of Cancer Terms"
  ],
  "url": "https://mlchart.com/terminology/oncology/luminal-a-breast-cancer/"
}