SOX9 and well-differentiated liposarcoma: SOX9 expression varied significantly among histological subtypes (p = 0.017), with ALT/WDLS cases exhibiting a predominance of high-level expression (RQ > 50 in 12 out of 19 cases), in contrast to myxoid subtypes, which predominantly clustered within the 10–50 RQ range (RQ 10–50 in 8 out of 9 cases).