Table 2.

Histological grading lesion score. (TRI and PSR: histological colorations).

	0	1	2	3	4
Deferent duct lesions	Normal	Wall reduction	Flattening of epithelium and wall reduction	Moderate lesions	Severe lesions with dilation and loss of structures
Inflammation (PMN, eosinophils, lymphocytes, plasma cells, macrophages 40x)	0	1–5 cells	5–10 cells	Important	Concentrated cells
Granulomas	0	1	1–2	3–5	>5
Giant cells	0	1–2	3–5	Moderate	Severe
Necrosis	0	Minimal	Mild	Moderate	Severe
Neovascularization	0	1–3 capillaries	4–7 capillaries and connective tissue	Capillary bands and connective tissue	Major Neovascularization areas
Fibrosis (TRI)	0	Thin bands	Moderate bands	Dense bands	Major fibrosis areas
Presence of hyaline substance (PSR)	0	Minimal	Moderate	Marked	Very severe