Gender-related differences in prolactinomas. A clinicopathological study.

Area of Science:

• Endocrinology
• Neurosurgery
• Oncology

Background:

• Prolactinomas, the most common pituitary tumors, exhibit poorly understood gender-related differences.
• Limited research exists on how gender impacts prolactinoma growth, presentation, surgical outcomes, and prognosis.

Purpose of the Study:

• To investigate gender-specific differences in the clinical presentation, tumor biology, and surgical outcomes of prolactinomas.
• To identify prognostic factors influencing the long-term prognosis of surgically treated prolactinomas.

Main Methods:

• Retrospective review of 26 surgically treated prolactinoma patients (1990-1997).
• Analysis of patient charts, histological (mitotic index), immunohistological (MIB-1 labeling index), and electron microscopic data.
• Comparison of clinical and pathological features between male and female patients.

Main Results:

• Men were older, presented with shorter symptom duration, higher prolactin levels, and more psychological symptoms than women.
• Women experienced menstrual abnormalities; men reported impotence.
• Tumor proliferative activity (mitotic index, MIB-1) and invasiveness were higher in men, correlating with worse surgical outcomes.
• Women had significantly better overall outcomes; age <35 was a positive prognostic factor.

Conclusions:

• Prolactinoma biology and clinical course differ significantly between genders.
• Men tend to have larger, more invasive, rapidly growing tumors with poorer surgical outcomes.
• Findings support a potentially more aggressive therapeutic strategy for prolactinomas in men compared to women.