Sexual behaviour and increased anal cancer.

An increase in epidermoid anal cancer has been observed in the past 30 years (1959-89). This increase in anal cancer has been noted to be more pronounced in women than men. The absence of a significant interactive effect of the HIV and human papillomaviruses and the incidence of anal cancer has been noted in some studies.

Sperm-induced urolithiasis in the rat.

Experiments are described demonstrating that experimental insemination with autologous or homologous sperm into the ventral prostate or bladder neck of outbred Zbar male rats induces intravesical precipitation or stones. These observations suggest that clinical conditions resulting in intravesical sperm may be contributory to bladder lithiasis in man and may have relevance to its prevalence in men vs. women.

The persisting enigma of AIDS-associated Kaposi's sarcoma: a hypothesis.

The widespread prevalence of Kaposi's sarcoma during the HIV/AIDS epidemic and its unique epidemiological predilection for select groups 'at risk' for AIDS relative to their 'life-style' orientation provide the rationale for etiologic agent(s) other than HIV. In keeping with the requisites for the development and progression of malignancy, i.e.