Le syndrome des ovaires polykystiques en période péri-pubertaire : polymorphisme clinique, biologique, métabolique et génétique

Prevalence of polycystic ovary syndrome in young women who had idiopathic central precocious puberty

OBJECTIVE

To assess the prevalence of polycystic ovary syndrome (PCOS) in a cohort of young women with previous idiopathic central precocious puberty (ICPP) at least 3 years after menarche, and to look for any predictive factors of PCOS at the time ICPP was diagnosed.

DESIGN

Longitudinal study.

SETTING

Pediatrics unit, Verona, Italy.

PATIENT(S)

Forty-six young women (18.1 +/- 3.0 years) who had been treated with GnRH analogues during childhood, observed at gynecologic age of 6.23 +/- 3.3 years.

INTERVENTION(S)

Semistructured interview concerning cycles, physical exam, blood sampling, and transabdominal pelvic ultrasound.

MAIN OUTCOME MEASURE(S)

Oligomenorrhea, LH, FSH, E(2), T, DHEAS, free T, delta4-androstenedione, 17-OHP, P, polycystic ovary morphology (PCOM).

RESULT(S)

Fifteen percent of the young women had oligomenorrhea, 28% clinical hyperandrogenism, 48% biochemical hyperandrogenism, and 37% PCOM. A total of 32% of the patients had PCOS according to the Rotterdam definition and 30% had PCOS according to the Androgen Exess Society. The prevalent phenotype of PCOS was characterized by clinical and/or biochemical hyperandrogenism and PCOM. We did not find any predictive factors for PCOS at the time ICPP was diagnosed.

CONCLUSION(S)

Patients with ICCP are prone to developing PCOS. The prominent phenotype in this cohort was PCOM associated with clinical and/or biochemical hyperandrogenism. Further follow-ups of these young adult patients will clarify whether this phenotype persists and if it will have important long-term implications regarding increased risk of infertility or metabolic complications.

Polycystic ovarian syndrome in adolescents

PURPOSE OF REVIEW

As polycystic ovarian syndrome is among the most common endocrinologic disorders during adolescence, there is always a need to investigate all new relevant data.

RECENT FINDINGS

The present review article, is occupied with - apart from basic knowledge on polycystic ovarian syndrome - issues concerning genetics, new trends in diagnosis, and data on metabolic and endocrine features of the syndrome. Finally, emphasis is given to current therapeutic trends.

SUMMARY

Early recognition and prompt treatment of polycystic ovarian syndrome in adolescents is important to prevent long-term sequellae. More research is necessary in order to find answers to many clinical and theoretical aspects of the syndrome.

Acceleration of luteinizing hormone pulse frequency in adolescent girls with a history of central precocious puberty with versus without hyperandrogenism

Some adolescents with a history of idiopathic central precocious puberty (ICPP) develop hyperandrogenism.

HYPOTHESIS

Luteinizing hormone (LH) hypersecretion could be a common mechanism underlying ICPP and polycystic ovary syndrome.

AIM

To explore the GnRH-LH axis in those patients.

DESIGN

To compare overnight LH secretion in 7 healthy adolescents (CG) with that in patients with prior ICPP [5 with (CPPA) and 7 without (CPPB) hyperandrogenism]. To analyze daytime LH secretion in those patients.

METHODS

LH secretion was quantified by immunofluorometry and deconvolution analysis.

RESULTS

Nighttime mean LH (international units/liter) was higher in CPPA (6.9 +/- 1.5) than in CPPB (3.2 +/- 0.4, p < 0.05) and CG (2.9 +/- 0.4, p < 0.01). Deconvolution analysis revealed a greater nighttime LH frequency (pulses/hour) both in CPPA (0.91 +/- 0.06, p < 0.01) and CPPB (0.74 +/- 0.02, p < 0.05) than in CG (0.45 +/- 0.07). CPPA patients maintained a higher frequency than CPPB. Pulsatile LH production was greater in CPPA than in CG (50 +/- 12 vs. 18 +/- 3 IU/l/day, p < 0.01). Daytime mass of LH released per burst and pulsatile production rate were significantly greater in CPPA than in CPPB patients.

CONCLUSIONS

Hyperandrogenic adolescents with prior ICPP show increased pulsatile LH secretion. Augmentation of LH pulsatility may predispose to or cause hyperandrogenism in some adolescents with a history of precocious puberty.

Clinical expression of polycystic ovary syndrome in adolescent girls

Polycystic ovary syndrome (PCOS) is one of the major causes of adolescent hyperandrogenism and menstrual disorders. Because there is no universal definition for adolescent PCOS, we recommend four out of five criteria: clinical and biologic evidence of hyperandrogenism, hyperinsulinism, oligo-/amenorrhea, and polycystic ovaries on ultrasonography.

Le consensus de Rotterdam appliqué à l'adolescente : quels examens prescrire et comment les interpréter pour établir le diagnostic de SOPK ?

The polycystic ovary syndrome (PCOS) is the most frequent cause of hyperandrogenism and anovulation in adult women as well as in adolescent girls. Since 2003 the diagnosis of PCOS has been based on the association of hyperandrogenism, oligoanovulation and polycystic ovary (PCO) morphology at ultrasound (at least 2 items out of 3). In adolescents however, PCOS features may be difficult to distinguish from the symptoms of the end of puberty. Moreover, transvaginal ultrasound examination is seldom possible, and it is difficult to get precise imaging of the ovaries by abdominal route. However, the diagnosis of PCOS in a hyperandrogenic and/or oligomenorrheic adolescent requires on the strict application of the Rotterdam criteria, as in adult women. Priority should be given to clinical features whereas pelvic ultrasound must be considered as optional. Few hormonal assays will serve mainly to make the differential diagnosis, in addition to clinical findings. Once established, the diagnosis of PCOS in an adolescent girl must lead to the detection of the metabolic syndrome by means of simple investigations. This will allow early prevention of its complications.