The term "subtype" has officially replaced "variant" for distinct morphologic categories. "Variant" is now reserved specifically for genomic alterations.
Muscle-invasive bladder carcinoma is now categorized into six molecular subgroups: luminal-papillary, luminal non-specified, luminal-unstable, stroma-rich, basal-squamous, and neuroendocrine-like. Pathology and Genetics of Tumours of the Urinar...
5%) of a high-grade component in a papillary tumour warrants a high-grade diagnosis. The term "subtype" has officially replaced "variant" for