TARANNUM MASTER-HUNTER, M.D., and DIANA L. HEIMAN, M.D.

Patient history and physical examination can help differentiate the causes of amenorrhea. Primary amenorrhea should be evaluated in the context of the development of secondary sexual characteristics. Laboratory testing offers additional assistance in determining the cause of secondary amenorrhea.

Patient information: "Amenorrhea: What You Should Know," p. 1387

ERIC L. ANDERSON, LT, MC (FS), USNR

Patients with arrhythmogenic right ventricular dysplasia are treated initially with antiarrhythmogenic agents, although placement of an automatic implantable cardioverter-defibrillator should be seriously considered.

Patient information: "Arrhythmogenic Right Ventricular Dysplasia: What You Should Know," p. 1401

AYAZ VIRJI, M.D., and MICHEL M. MURR, M.D.

In severely obese patients, bariatric surgery may be curative for such obesity-related comorbidities as diabetes and obstructive sleep apnea. The number of bariatric surgeries has increased greatly in the last 10 years. It is important for family physicians to understand the risks and benefits of bariatric surgery, as well as the lifelong medical surveillance that these patients require.

Editorial: "Bariatric Surgery: Too Many Unanswered Questions," p. 1335

KARL E. MILLER, M.D.

Chlamydia trachomatis infection commonly affects the urogenital tract but can cause conjunctivitis and pneumonia in infants. In men, the infection usually is symptomatic, with dysuria and a discharge from the penis; women usually have minimal or no symptoms, but some develop pelvic inflammatory disease. Treatment depends on the site of the infection, the age of the patient, and whether or not the infection is complicated.