The phrase "prior chemotherapy" means that someone has already received treatment for their illness using drugs specifically designed to kill cancer cells before the current situation. Full definition
This treatment is available for any canine patient with a confirmed diagnosis of T - cell lymphoma, whether the patient has received prior chemotherapy or not. (vetspecialty.com)
Palbociclib in Combination with Fulvestrant or Tamoxifen as Treatment for Hormone Receptor - Positive Metastatic Breast Cancer with Prior Chemotherapy for Advanced Disease: A Phase II Study with Pharmacodynamic Markers (TBCRC035) (vicc.org)
• Subject has AML secondary to prior chemotherapy for other neoplasms (except for MDS). (vicc.org)