Nuclear morphological atypia in biopsy accurately reflects the prognosis of myxoid liposarcoma

In this study, we determined whether nuclear morphology may be used to predict the prognosis of MLS in primary biopsy specimens. Two pathologists evaluated nuclear morphology using the modified WHO/ISUP and Fuhrman grades. Survival analyses were performed by grouping nuclear high- and low-grades. We examined 53 MLS cases, which included 29 (54.7%) male and 24 (45.3%) female patients with a median age of 46  years (interquartile range, 37 − 60). In total, 7 (13.2%) and 16 (30.2%) cases were assigned to the high nuclear grade group based on the modified WHO/ISUP and Fuhrman gradings, respectively. Survival analyses revealed a significantly worse disease-free survival in the high-grade group (haza rd ratio (HR), 7.51; 95% confidence interval (CI), 2.67–21.1,p <  0.001 by the modified WHO/ISUP grading; HR, 4.45; 95% CI, 1.63–12.1,p = 0.001 by the modified Fuhrman grading). Moreover, the modified WHO/ISUP grade showed a significantly worse overall survival in the high-grade group (HR, 4.39; 95% CI, 1.04–18.6,p = 0.028), and the modified Fuhrman grade exhibited a similar, but not significant, trend. Our results indicate that nuclear morphology grading is a good predictor of patient prognosis at the time of biopsy in MLS. Even when cell density is sparse, treatment strategies should be carefully consid ered when individual tumor cells exhibit atypical nuclei.

Source: Virchows Archiv - March 28, 2024 Category: Pathology Source Type: research