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[Searching for prolactin microadenoma: scanner or MRI?]
F Delecourt1, X Leclerc, Y Ardaens
1Service d'Endocrinologie et de Diabétologie, Centre Hospitalier et Universitaire, Lille.
Annales D'Endocrinologie
|January 1, 1993
Summary
CT scans are effective for detecting pituitary microadenomas in hyperprolactinemic women. While MRI with Gadolinium is more sensitive, optimized CT scans offer comparable diagnostic potential for microadenoma detection.
Area of Science:
- Endocrinology
- Radiology
- Oncology
Background:
- Hyperprolactinemia is often caused by pituitary microadenomas.
- Accurate imaging is crucial for diagnosing these tumors.
Purpose of the Study:
- To compare the diagnostic efficacy of CT and MRI scans in detecting pituitary microadenomas in hyperprolactinemic women.
Main Methods:
- Thirty-three hyperprolactinemic women (aged 16-46) underwent both CT and MRI scans (with Gadolinium contrast).
- Image analysis focused on direct visualization of microadenomas and indirect signs (e.g., pituitary stalk tilting, sella floor erosion).
Main Results:
- MRI with Gadolinium (MRI G+) showed higher sensitivity (30/33) than CT (21/33) for detecting microadenomas.
- Optimized CT scans (thin cuts, iodine contrast) demonstrated comparable diagnostic power, missing only 17.6% of lesions, primarily those <5mm.
- Indirect signs of microadenoma had minimal diagnostic value, with lower sensitivity on CT compared to MRI G+.
Conclusions:
- Optimized CT scans are a valuable primary tool for detecting pituitary microadenomas.
- Considering cost and accessibility, CT is recommended as the initial imaging modality, reserving MRI for complex cases or when CT is inconclusive.