trunk/mediastinum 7%.Extremely rare presentations included cardiac Ewing sarcoma, renal clear cell sarcoma, intramedullary malignant melanocytic nerve sheath tumour, and infantile fibrosarcoma.BCOR-altered sarcomas, both uterine and softtissue, were captured as emerging molecular subsets.Conclusions: This is one of the largest recent Indian datasets describing real-world patterns of ultra-rare sarcomas.The wide anatomical spectrum, high proportion of visceral and head-and-neck primaries, and diversity of molecularly defined entities highlight the need for systematic referral pathways and greater access to molecular diagnostics.These findings provide essential baseline data for national registries and future collaborative trials in ultra-rare sarcomas.
Fuente et al. (Sun,) studied this question.