The PCOS Plan. Jason Fung
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Название: The PCOS Plan

Автор: Jason Fung

Издательство: Ingram

Жанр: Здоровье

Серия:

isbn: 9781771644617

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СКАЧАТЬ ovaries disorder, a syndrome of polycystic ovaries, functional ovary androgenism, hyperandrogenic chronic anovulation, polycystic ovarian syndrome, ovarian dysmetabolic syndrome, sclerotic polycystic ovary syndrome, and so forth—researchers did not always know if they were talking about the same disease. To move forward in properly identifying and diagnosing the disorder, the terms would need to be standardized.

      Attendees of the 1990 National Institute of Child Health and Human Development (NICHD) conference on PCOS took the first step when they agreed by consensus on the following specific criteria:

      1.Evidence of excess androgens (symptomatic or biochemical)

      2.Persistent rare or absent ovulatory cycles

      Because these symptoms are not specific to PCOS, other diseases would still need to be ruled out. However, these so-called National Institutes of Health (NIH) criteria were a giant leap forward because proper classification allowed international collaboration between universities and researchers. Interestingly, the NIH criteria do not require evidence of polycystic ovaries, which obviously presented a problem for a disease known as polycystic ovary syndrome.

      Figure 1.3. The number of scientific articles linking PCOS and insulin resistance increased from one in 1980 to about 12,000 in 20118

      In 2003 the second international conference on PCOS was held in Rotterdam, the Netherlands. Two new features were added to the NIH criteria. First, the mention of polycystic ovaries was introduced. It took a mere 14 years to correct that little oversight! Second, PCOS was recognized as a spectrum of disease in which not all symptoms may appear in all patients, and it was decided that a patient could be diagnosed with PCOS if they showed two of three criteria. The updated criteria, published in 2004, became known as the Rotterdam criteria:

      1.Hyperandrogenism: literally, a state of too many androgens. The prefix “hyper” means “too much” and the suffix “ism” means “a state of.”

      2.Oligo-anovulation: literally, few or no ovulatory menstrual cycles. The prefix “oligo” means “few” and the prefix “a” means “absence of.”

      3.Polycystic ovaries: literally, many cysts in the ovaries. The prefix “poly” means “many.”

      Figure 1.4. Diagnostic criteria9

      In 2006 the Androgen Excess Society (AES) recommended that hyperandrogenism be considered the clinical and biochemical hallmark of PCOS. Without evidence of hyperandrogenism, they suggested, a person simply could not receive a diagnosis of PCOS. The AES recommendation of making hyperandrogenism a necessary criterion for PCOS diagnosis focused researchers and doctors on the underlying cause of disease rather than merely on the presence or absence of polycystic ovaries.

      Today, the NIH criteria are rarely used. In 2012, an NIH Expert Panel recommended that the Rotterdam criteria be used for diagnosis. And being fairly similar to those criteria, the AES 2006 recommendations are commonly used as well.

      Table 1.1. Criteria for the diagnosis of polycystic ovary syndrome10

NIH/NICHDa 1992 ESHRE/ASRMb (Rotterdam criteria) 2004 Androgen Excess Society 2006
Exclusion of other androgen excess or related disorders Includes all of the following: •Clinical and/or biochemical hyperandrogenism •Menstrual dysfunction Exclusion of other androgen excess or related disorders Includes two of the following: •Clinical and/or biochemical hyperandrogenism •Oligo-ovulation or anovulation •Polycystic ovaries Exclusion of other androgen excess or related disorders Includes all of the following: •Clinical and/or biochemical hyperandrogenism •Ovarian dysfunction and/or polycystic ovaries

      a National Institutes of Health/National Institute of Child Health and Human Development

      b European Society for Human Reproduction and Embryology/American Society for Reproductive Medicine

      It is important to note here that although obesity, insulin resistance, and type 2 diabetes are commonly found in association with PCOS, they are not part of the diagnostic criteria.

       The PCOS Spectrum: What PCOS Is and Is Not

      .................

      TO CONFIRM A diagnosis of polycystic ovary syndrome (PCOS), clinicians must confirm the presence of two out of the three following conditions: hyperandrogenism, menstrual irregularities, and polycystic ovaries. Because some women will present with all three criteria and others will have only two, PCOS represents a spectrum of disease. The Rotterdam criteria recognized this continuum and grouped patients into four different phenotypes:

      ·Frank or classic polycystic ovary PCOS (chronic anovulation, hyperandrogenism, and polycystic ovaries—3 of 3 criteria)

      ·Classic non-polycystic ovary PCOS (chronic anovulation, hyperandrogenism, and normal ovaries—2 of 3 criteria)

      ·Nonclassic ovulatory PCOS (regular menstrual cycles, hyperandrogenism, and polycystic ovaries—2 of 3 criteria)

      ·Nonclassic, mild PCOS (chronic anovulation, normal androgens, and polycystic ovaries—2 of 3 criteria)

      The frank phenotype represents the most severe disease and is associated with metabolic diseases like obesity and type 2 diabetes and with cardiovascular risk factors like high blood pressure and cholesterol. In contrast, women with nonclassic, mild PCOS are at the lowest risk of metabolic disease.1 Why some women with PCOS present with hyperandrogenism as opposed to anovulatory cycles is unknown.

      While women may have genetic or other factors that predispose them to PCOS, lifestyle—and particularly Body Mass Index—likely determines their position on the spectrum. Weight gain moves women toward the severe end of the spectrum.2 Weight loss, in contrast, moves women toward the less severe end of the spectrum by improving fertility, ovulatory cycles, and hirsutism.3

       MAKING THE DIAGNOSIS

       Hyperandrogenism

      Male sex hormones, called androgens, are normally present in both men and women, but the normal levels for men are far higher than for women. Testosterone is the best-known androgen and contributes to many of the physical factors that distinguish men from women. It is produced in the testes in men and in the ovaries in women. Small amounts are also produced in the adrenal glands that sit above the kidneys. Testosterone helps regulate sex drive, fat distribution, and bone mass. More than 80 percent of women who present with symptoms of hyperandrogenism will eventually be diagnosed with PCOS.4

      Common features of hyperandrogenism include

      ·increased facial and body hair growth (hirsutism),

      ·male-pattern СКАЧАТЬ