Ko Ando

Primary carcinoma of seminal vesicle: Diagnosis assisted by sonography

A case of primary carcinoma of the seminal vesicle in a nineteen-year-old man is described. This patient represents the twelfth case reported in the literature in Japan. The experience gained in this case indicated the potential usefulness of ultrasonography in the diagnosis of primary carcinoma of the seminal vesicle.

Content and distribution of vasoactive intestinal polypeptide (VIP) in cavernous tissue of human penis

Penile erection is controlled by a valvular structure in the helicine artery in humans. The opening and closing of this valve are believed to be regulated by the autonomic nervous system, especially through the release of vasoactive intestinal polypeptide (VIP). We determined the content of VIP in cavernous tissue in 18 impotent patients and in 5 normal controls by radioimmunoassay, and we examined the distribution of VIP-ergic nerve fibers in cavernous tissue by an immunohistochemical method. As a result, it was found that the lower penile VIP content was more frequent among patients with organic impotence than among the controls. Furthermore, VIP-ergic nerve fibers were seen to be diffusely and loosely distributed in a large number of organic impotence patients. These findings suggest that organic impotence in some patients may be due to decreases in the VIP content and in VIP-ergic nerve fibers.

Primary lipogranuloma of male genitalia

Lipogranulomas developing secondarily in the genitourinary system have been reported rather frequently, but primary lipogranulomas without any past history of etiologically related conditions are rare. We report on 2 cases recently encountered in which tumors were diagnosed as sclerosing lipogranuloma on histopathologic examination.

Synchronous bilateral testicular tumors of different cell types on each side

Bilateral and synchronous testicular tumors consisting of different cell types on each side are rare. We describe one additional case of synchronous bilateral testicular tumors comprised of different cell types on each side and review the relative literature.