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Study identifier: NCT07268183 Synced from ClinicalTrials.gov · July 28, 2026
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How Estrogen Fluctuations Before Diagnosis Affect the Size Prolactin-secreting Tumors

Condition: Prolactinoma · Macroprolactinoma  ·  Sponsor: Hospices Civils de Lyon

PhaseN/A
Planned participants180
Who can joinFemale, 18 Years to no upper limit
Healthy volunteersNo

About this study

Prolactinomas are the most common pituitary adenomas, representing about two-thirds of clinically relevant cases. Their prevalence is around 50 per 100,000 individuals, with an incidence of 3-5 new cases per 100,000 per year and has been rising in recent decades. They may increase morbidity and mortality due to several factors: * Hormone hypersecretion: excess prolactin causes galactorrhea, amenorrhea, and infertility. * Mass effect: macroadenomas can compress adjacent structures, leading to headaches, visual loss, or neurological symptoms. * Treatment complications: medical or surgical treatments may carry risks. A marked sex difference exists, with a male-to-female ratio of 1:5-1:10, and peak diagnosis in women aged 25-44. This disparity disappears after menopause, supporting a potential role of estrogens in tumor development. Lactotrope cells, from which prolactinomas arise, are estrogen-sensitive, unlike other pituitary tumor cells (e.g., somatotrophs, gonadotrophs). A large 2022 prospective cohort (nurses) suggested a possible association between pituitary adenomas and both combined oral contraceptives (COCs) and hormone therapy (HT). However, limitations included self-reported diagnoses, lack of adenoma characterization, and contradictory findings (association with HT but not consistently with COCs). A 2009 case-control study including all adenomas found no link with hormonal contraception, while older studies from the 1980s assessed high-dose contraceptives no long…

This description comes directly from the study's public registry record.

Talk to the study team

Gerald RAVEROT, Pr  ·  04 27 85 66 66  ·  gerald.raverot@chu-lyon.fr

Mathilde BLARY  ·  mathilde.blary@chu-lyon.fr

Always discuss trial participation with your own doctor first.

Locations (1)

Hopital Louis PradelBron, Rhone, FranceRecruiting

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Source record: clinicaltrials.gov/study/NCT07268183