- With Mayo Clinic endocrinologist
Todd B. Nippoldt, M.D.read biographyclose window
Todd B. Nippoldt, M.D.Todd Nippoldt, M.D.
Dr. Todd Nippoldt is a board-certified specialist in internal medicine and endocrinology and metabolism. He has special expertise in the area of hormone disorders affecting the pituitary and adrenal glands as well as the testes and ovaries. He has been a member of the Mayo Clinic staff since 1988.
He's a consultant in the Division of Endocrinology, Metabolism and Nutrition and works with patients who have disorders of the hormone-producing glands. Common disorders include diabetes, thyroid problems, osteoporosis and elevated cholesterol levels.
He's also involved in andrology, the study of male hormonal disorders, male infertility and male sexual dysfunction, and is an assistant professor of medicine at College of Medicine, Mayo Clinic.
Dr. Nippoldt, a St. Paul, Minn., native, has also contributed to "Mayo Clinic Health Letter," the "Mayo Clinic Family Health Book" and a Mayo Clinic CD-ROM. He's a fellow in the American College of Physicians and a member of the American Society for Reproductive Medicine, the American Society of Andrology, The Endocrine Society, The Pituitary Society and the American Association of Clinical Endocrinologists.
"I have found that those patients who have gone to the Internet and obtained accurate medical information come to their appointment with me very well informed, and the discussions regarding the evaluation and management of their condition are very productive and satisfying," he says.
"The key, however, is obtaining accurate medical information. As a medical editor, I hope to be able to ensure that accurate, relevant and up-to-date information is available for patients and their families."
Discolored semen: What does it mean?
I've noticed that my semen has a yellowish-green tint to it. Should I be concerned about discolored semen?
from Todd B. Nippoldt, M.D.
Semen color and consistency can vary based on several factors, such as age, diet and frequency of ejaculation. However, yellowish-green semen may indicate a prostate infection. Semen is normally a whitish, cloudy fluid. It's usually quite thick just after ejaculation, but liquefies about 20 to 30 minutes later.
Changes in the appearance of semen are usually temporary and not a health concern. However, sometimes these changes can be a sign of an underlying medical condition that requires further evaluation. If these changes persist for longer than a week or two or if the color change is associated with other symptoms such as pain, fever, sexual dysfunction or blood in the urine, see your doctor for an evaluation.
|Abnormal semen color or consistency||Possible medical cause|
|Yellow, green or gold||Prostate infection|
|Yellow-tinted||Urine in the semen|
|Thick, lumpy or jelly-like||Male hormone deficiency|
|Pink, red or dark brown||Bleeding from the prostate|
- Wein AJ, et al. Campbell-Walsh Urology. 10th ed. Philadelphia, Pa.: Saunders Elsevier; 2012. http://www.mdconsult.com/das/book/body/208746819-6/0/1445/0.html. Accessed May 20, 2012.
- McPherson RA, et al. Henry's Clinical Diagnosis and Management by Laboratory Methods. 22nd ed. Philadelphia, Pa.: Saunders Elsevier; 2011. http://www.mdconsult.com/das/book/body/208746819-6/0/1393/0.html. Accessed May 20, 2012.
- Nippoldt TB (expert opinion). Mayo Clinic, Rochester, Minn. May 23, 2012.