ca is the abbreviation for cancer, and prostate ca stands for prostate cancer. ca is the abbreviation of “Cancer”, which means cancer, and prostate ca is the abbreviation of prostate cancer in medicine. Malignant tumors that originate in the epithelial cells are called carcinomas, while those that originate in the mesenchyme are called sarcomas. Prostate cancer is a malignant tumor that originates in the epithelial cells of the prostate. Prostate cancer is a common malignant tumor in elderly men, and more than 95% of them are follicular adenocarcinoma, i.e., originating from glandular epithelial cells, while a small number of them are squamous adenocarcinoma, ductal adenocarcinoma, and so on. Prostate cancer mostly occurs in the peripheral zone, which may manifest as urinary frequency, urgency, difficulty in urination, urinary retention and other lower urinary tract obstruction symptoms, and requires radical surgery, radiotherapy, endocrine therapy, etc. according to the condition. If it is suspected or diagnosed as recurrence of prostate cancer, it is recommended to go to regular hospitals for comprehensive assessment of the condition and follow the doctor’s instructions to cooperate with the treatment, so as to avoid delaying the condition.