Urothelial carcinoma has a propensity for aberrant differentiation, with squamous and glandular being the most com-" mon histological variants [1]. Notably, divergent differentiation occurs more frequently in high-grade and high-stage tumours [2]. Recently, urothelial carcinoma with abundant myxoid stroma has been identified as a new histological variant [3]. The origin of stromal mucin, however, is currentlv unclear.
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