Tumor‐derived cell‐free DNA in body cavity effusion supernatants: A promising alternative for genomic profiling

Genomic profiling of tumor from malignant effusions have conventionally been performed on tumor cells derived from cytologic preparations such as cell block preparations, direct smears, cytospin preparations and liquid based cytologic preparations. The study by Yang et al. exemplifies the rapid progress of molecular cytopathology as cytopathologists increasingly delve into novel sources for genomic testing in an attempt to provide the theranostic information necessary for patient care.