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[Macroprolactinoma resistant to bromocriptine].

E López-Espinosa, A R Ayala, J Grimaldo

    Archivos De Investigacion Medica
    |January 1, 1989
    PubMed
    Summary
    This summary is machine-generated.

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    A patient with a pituitary tumor experienced symptom relapse after bromocriptine treatment, necessitating surgery. Post-surgery, growth hormone levels significantly decreased, suggesting a mixed hormonal tumor.

    Area of Science:

    • Endocrinology
    • Neuroscience
    • Oncology

    Background:

    • Pituitary macroprolactinomas can cause amenorrhea-galactorrhea and visual disturbances.
    • Bromocriptine is a common treatment for hyperprolactinemia, aiming to reduce prolactin levels and tumor size.

    Observation:

    • A 24-year-old female presented with amenorrhea-galactorrhea due to a pituitary macroprolactinoma.
    • Initial bromocriptine treatment improved visual fields and intracranial hypertension, normalizing prolactin levels.
    • Symptoms relapsed after two years, leading to transsphenoidal hypophysectomy.

    Findings:

    • Serum prolactin levels normalized with bromocriptine and remained stable post-surgery.
    • Gonadotropin production remained low after both treatments.
    • Growth hormone (GH) levels significantly decreased (p < 0.5) after pituitary ablation.

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    Implications:

    • The findings suggest a potential mixed hormonal nature of the pituitary tumor, possibly involving GH activity not clinically expressed or overproduced.
    • This case highlights the complexity of pituitary tumors and the need for comprehensive hormonal evaluation.
    • Understanding mixed pituitary tumors is crucial for optimizing treatment strategies and predicting patient outcomes.