<unk>  is a complication experienced in approximately 66% of men who undergo vasectomy. It is a benign nodular thickening of the vas deferens, in which small offshoots proliferate, infiltrating surrounding tissue. It can be mistaken for low-grade adenocarcinoma by pathologists, and is implicated in late vasectomy failure.
Vasitis nodosa
Granular myringitis
Urticarial vasculitis
Polyarteritis nodosa
Erythema nodosum
Lymphangitis carcinomatosa
Livedoid vasculitis
Lupus vasculitis