Where are specimens for cytopathologic testing primarily obtained from?

Cytopathologic testing primarily involves the examination of individual cells obtained from various body fluids or tissues. This type of testing is essential for diagnosing conditions such as cancer, infections, or inflammatory diseases. Specimens can be sourced from several locations within the body, including blood, tissue biopsies, and urine.

Blood samples may be used in certain cytological analyses, while urine samples can provide information about bladder and kidney conditions. Tissue biopsies are also a critical source, allowing for the assessment of cellular changes in tissues from specific organs.

By acknowledging that specimens for cytopathologic testing can come from multiple sources, it is clear that a comprehensive approach to specimen collection ensures a thorough investigation of cellular characteristics across different body systems. This multifaceted collection method is reflected in the correct answer which recognizes the broad range of sample origins that are pertinent to cytopathology.