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  • Title: Diagnostic value of thyrotropin releasing hormone test in 129 patients with suspected tumoral hyperprolactinemia.
    Author: Smircić-Duvnjak L, Vizner B, Korsić M, Sekso M, Berković M.
    Journal: Coll Antropol; 2002 Dec; 26(2):635-40. PubMed ID: 12528293.
    Abstract:
    In 129 hyperprolactinemic (PRL > or = 100 ng/mL) and 100 normoprolactinemic patients (PRL 0-25 ng/mL), delta max. PRL (the difference between maximal prolactin (PRL) after thyrotropin releasing hormone (TRH) injection and basal value) was compared with basal PRL and computed tomography (CT) of the sellar region. In 122 hyperprolactinemic patients delta max. PRL was < 100%, while tumor was found in 106 of them. In the remainder seven hyperprolactinemic patients delta max. PRL was > or = 100% and CT showed no tumor. A significant difference in delta max. PRL between hyperprolactinemic patients without and those with verified adenoma was found and showed a significant negative correlation with basal PRL. Between 122 hyperprolactinemic patients with delta max. PRL < 100%, mean basal PRL and duration of clinical symptoms were significantly lower in 16 patients with normal CT compared to 106 patients with tumor. All normoprolactinemic patients showed delta max. PRL > or = 100% and no tumor on CT. PRL stimulation disturbance precedes tumor visualization and represents a decisive diagnostic parameter in hyperprolactinemic patients with no tumor signs.
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