[The role of regional research laboratories of the local government in administering regional EQA programs].

In 1981, the Japanese Ministry of Health and Welfare revised the enforcement of regulations of the Medical Technologists' Act. The amendments stipulate that all independent laboratories are legally obliged to introduce laboratory quality assurance programs and are responsible for the quality of all test results. To ensure adherence to these regulations, regional research laboratories of local governments such as the Tokyo Metropolitan Research Laboratory of Public Health should conduct regional external quality assessment (EQA) programs.

Inhibition of aromatase activity by green tea extract catechins and their endocrinological effects of oral administration in rats.

We orally administered polyphenone-60 (P-60), green tea extract catechins, in the diet (0, 1.25 and 5%) to male rats for 2, 4 and 8 weeks initiated at 5 weeks old. It was found that a 5% dose to male rats for 2-8 weeks induced goiters and decreased weights of the body, testis and prostate gland.

Goitrogenic effects of green tea extract catechins by dietary administration in rats.

The effects of green tea extract catechins on the rat thyroid were examined in a 13-week feeding study and subsequent 2-,4- and 8-week studies. Commercially available polyphenon-60 (P-60) which contains green tea extract catechins at 66.2% was used as a source of catechins.

[Adenomatoid tumor of testicular tunica albuginea: a case report].

Adenomatoid tumors are uncommon neoplasms of the paratesticular tissues. We report a case of an adenomatoid tumor of the testicular tunica albuginea. A 54-year-old man presented with a painless right intrascrotal mass.

Chronic oral toxicity and carcinogenicity study of thiabendazole in rats.

The potential toxicity and carcinogenicity of thiabendazole (TBZ) was investigated in F344 rats. TBZ was given in pelleted diets at different dietary levels (0, 0.05, 0.