Resumo

CASTRO REVOLLO, Magueha  e  CONTRERAS MOLINA, Fernando. RESONANCIA MAGNÉTICA EN ADENOMAS DE HIPÓFISIS. Rev. Méd. La Paz [online]. 2012, vol.18, n.2, pp.27-33. ISSN 1726-8958.

Objective: To relate the images of adenomas obtained by MRI for further characterízation using a high-resolution protocol Material and Methods: We analyzed 86 MRI retrospectivamen the sellar region in the Hospital Obrero No. 1 and are related to the type of contrast enhancement after paramagnetic and signs of compression. We studied 72 women and 14 men with an average of 43 years gave. The scans were performed using Magneto do a 1.5 T Signa, with cut-weighted sagittal and coronal T1 with and without paramagnetic contrast. Results: • 67.5% (58 patients) had pituitary adenoma. Of these the kind microadenomas were 51.1% and 48.3% macroadenoma. • 53.3% of microadenomas and 14.3% of macroadenomas had hyperprolactinemia. •  100% of the macroadenomas showed heterogeneous enhancement after administration of contrast medium. The microadenomas showed homogeneous enhancement in 76.6%. • The 85.7% of macroadenomas and 16.7% of microadenomas showed obliteration of the tank supraselar. • The 85.7% of macroadenomas and10% of microadenomas, produced displacement of optic chiasm. • 64.3% of macroadenomas and 20.7% of microadenomas, invaded the cavernous sinus and diverted the pituitary stalk. Conclusión: MRI is the imaging method of choicefor the study of the pituitary due to its characterisation in anatomy and function especially when using gadolinium.

Palavras-chave : MRI; Macroadenoma; Microadenomas; Highlight; Compression paraselar.