Common cancers--genetics, origin, prevention, screening: Parts I and II.

Carcinogenesis is a stepwise process that occurs through mutations of cancer-related genes. Five or more genes must be mutated before malignant transformation occurs in most adult cancers; in some childhood cancers as few as two mutated genes may be sufficient. A rare inherited mutation of a critical gene may predestine cancer to occur in one or more sites.

Contraception in the adolescent patient.

Having presented an overview of the available methods of contraception, the authors present one approach to prescribing contraceptives based on their experience. First, adolescent patients in our practice are discouraged from engaging in sexual intercourse. Abstinence is the only fail-safe method of contraception and provides benefits both emotionally and physically (i.

Family physicians' practices regarding Norplant.

Background: Norplant is a method of long-term contraception that was introduced in the United States in January 1991. This study was designed to explore the extent to which family physicians currently offer and insert Norplant.

Methods: A cross-sectional descriptive survey design was used to elicit information from a random sample of family physicians belonging to the Ohio Academy of Family Physicians.

Benign diseases of the prostate.

Benign diseases of the prostate are problems frequently seen by the primary care physician. Benign prostatic hyperplasia is easily diagnosed and effectively treated. The prostatitis syndromes can be confusing.