[Testicular toxoplasmosis: a rare case of a testicular mass].

Toxoplasma gondii is an intracellular protozoan infecting birds and mammals. Acute infection is asymptomatic in immune competent people. For immune deficient patients (acquired immune deficiency syndrome, lymphoma patients or those under steroids to prevent organ transplantation rejection) infection may be lethal. We describe an uncommon case of testicular toxoplasmosis in patient under steroids after organ transplantation with no positive serum test for HIV and/or systemic toxoplasmosis.