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Prolactin insufficiency but normal thyroid hormone levels after cranial radiotherapy in long-term survivors of childhood leukaemia.

In English

Författare

Summary, in English

BACKGROUND: Acute lymphoblastic leukaemia (ALL) patients treated with cranial radiotherapy (CRT) have an increased risk of GH deficiency (GHD). Little is known about insufficiencies of prolactin (PRL) and TSH, but also lactation failure has been reported in this population. OBJECTIVE: To study the long-term outcome of CRT on PRL and thyroid hormone levels in GHD ALL patients, and the prevalence of lactation failure. DESIGN: CASE-CONTROL STUDY: PATIENTS: We examined 40 GHD and 4 GH insufficient ALL patients, in median 20 years (range 8-27) after ALL diagnosis and 44 matched population controls. MEASUREMENTS: PRL secretion (area under the curve; AUC) after GHRH-arginine test in all patients and matched controls, and PRL and TSH AUC after a TRH test in 13 patients and 13 controls. And basal PRL and thyroid hormone levels after 5 years with GH therapy and 8 years without GH therapy. RESULTS: Compared to controls ALL patients had significantly lower basal and AUC PRL after GHRH-Arginine (P = 0.03, P = 0.02), and AUC PRL after TRH (P = 0.001). After 5 and 8 years, PRL levels decreased further (P = 0.01, P = 0.03), but thyroid hormones remained normal at baseline and at follow up. PRL insufficiency was significantly associated with increased levels of BMI and insulin. Six out of seven pregnant ALL women reported lactation failure. CONCLUSIONS: Long-term ALL survivors treated with CRT have GHD and PRL insufficiency, and a high prevalence of lactation failure, but thyroid hormones remained normal. PRL insufficiency was associated with cardiovascular risk. © 2012 Blackwell Publishing Ltd.

Publiceringsår

2013

Språk

Engelska

Sidor

71-78

Publikation/Tidskrift/Serie

Clinical Endocrinology

Volym

79

Issue

1

Dokumenttyp

Artikel i tidskrift

Förlag

Wiley-Blackwell

Ämne

  • Endocrinology and Diabetes

Status

Published

Forskningsgrupp

  • Diabetes - Clinical Obesity

ISBN/ISSN/Övrigt

  • ISSN: 1365-2265