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To delineate factors that might increase the risk of thromboembolic events in patients on estrogen therapy for prostatic carcinoma a study was undertaken of various coagulation parameters. A correlation was demonstrated between advanced stages of prostatic carcinoma and depression of the serum antithrombin III activity. The addition of estrogen therapy resulted in further depression. Since low levels of serum antithrombin III activity have been associated with thrombosis this observation may have clinical relevance.

An identical abnormal chromosome, i(12p), and a marker chromosome of unknown origin were seen in 2 tumors of different histology (seminoma and embryonal carcinoma) in the same testis. A younger brother of the patient also had undergone orchiectomy for 2 seminomas in the left testis 2 years previously. These findings are discussed in relation to the possible cellular background of testicular tumors and their genetic parameters.

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