The clinician's perspective on sarcoma pathology reporting: impact on treatment decisions?

The current refinement of nosological classification of sarcoma which integrates molecular typing with a growing number of subtypes contrasts with the one-size-fits-all approach proposed in clinical practice guidelines for both local treatment and systemic treatment in the past. However, there is a growing proportion of sarcomas in which specific treatment strategies are proposed as standard. As a consequence, central review by expert sarcoma pathologists should be organised to ensure the optimal management of all patients. The key parameters in the pathology report influencing treatment decisions are therefore rapidly evolving. First a diagnostic biopsy, ideally an imaged guided microbiopsy performed by an experienced team, is a recommended practice. On the resection specimen, the size, histological grade, location, depth, surgical margins and tumour fragmentation are essential parameters to guide the treating physician. Molecular characterisation of the driving genomic event is becoming increasingly important for treatment decision making, in routine practice and in clinical trials. Molecular grade is a research tool with potentially high utility, and requires further evaluation and validation in prospective clinical trials.