Spread through airspaces (STAS) on frozens: too much, too soon

The host discusses with Dr. Sanjay Mukhopadhyay and Dr. Monisha Sudarshan from Cleveland Clinic their recent Modern Pathology editorial on the findings by F. Zhou et al. (https://doi.org/10.1038/s41379-021-00875-x). The concept of tumor spread through air spaces (STAS) has been recently introduced and is gaining momentum. On permanent sections, STAS has been associated with an increased likelihood of lymph node metastases and aggressive behavior. However, the validity of using STAS diagnosis on frozen section to guide management is controversial. The guests argue that expecting pathologists to diagnose STAS on frozen section and bear responsibility for an aggressive surgical resection is fraught with risk. In their opinion, it is too much, too soon.

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