TABLE 1.

Uroplakin-positive structures in the urothelial cells of human normal urothelium, papilloma and papillary carcinoma (urothelial tumour, resection border and uninvolved urothelium of pTa and pT1).

Histology	Superficial cells		Intermediate cells		Basal cells
normal urothelium	mFV, iFV, UPTV,	aPM	UPTV*		uroplakin
papilloma papillary carcinoma	iFV*,	aPM*	UPTV*,	PM*	negative

mFV = mature fusiform vesicles, iFV = immature fusiform vesicles, UPTV = uroplakin-positive transporting vesicles, aPM = apical plasma membrane, PM = plasma membrane

^*individual cells (the majority of cells is uroplakin negative)