RigiScan data under long-term testosterone therapy: improving long-term blood circulation of penile arteries, penile length and girth, erectile function, and nocturnal penile tumescence and duration.

Background: Late-onset hypogonadism (LOH) presents with low serum testosterone (TT) levels and sexual and nonsexual symptoms. Erectile dysfunction affects a man's self-esteem and as a result partner relationship and quality of life.

Objectives: To investigate the andrological clinical profile outcomes of testosterone therapy (TTh) in men (n = 88) with symptomatic LOH complaints and symptoms.