Cytological samples can be obtained from various sources, including:
Body Fluids: Such as urine, cerebrospinal fluid, pleural fluid, and peritoneal fluid. Scrapings: Samples from the surface of tissues, like the cervix in Pap smears. Aspirates: Samples obtained through fine needle aspiration from masses or organs. Brushings: Cells collected by brushing the surface of an organ, such as the bronchus.