Cytopathology in focus: Small samples, big impact: cytology specimens in the molecular era
August 2025—Strides in medical imaging techniques and procurement methods have led to the acquisition of small diagnostic samples obtained by minimally invasive techniques. Over the same period, the breadth of molecular information that can be derived from limited tumor material has increased exponentially. In the age of targeted cancer therapy, the clinical utility of this information is substantial and, when coupled with the decreasing costs of molecular analysis, the information transformed the treatment landscape of cancer. These advances have brought cytology back into the spotlight as a potential source of material for biomarker analysis.