Hiperplasia hipofisaria idiopática: diagnóstico por resonancia magnética
Introduction. Hypophyseal hyperplasia is an uncommon disorder in which the gland increase in size due to excessive proliferation of strings of normal cells, which usually secrete prolactin. Different aetiologies may cause this disorder of the hypophyseal gland. However, in a small number of cases the hyperplasia is not due to any of these aetiologies and is therefore known as idiopathic hypophyseal hyperplasia. There are few references in the literature to idiopathic hypophyseal hyperplasia with hyperprolactinaemia. Usually diagnosis is reached after treatment for a hypophyseal adenoma, since the clinical features are similar. Clinical cases. We present three cases seen in our department, in which hormone and endocrine studies were done to exclude known causes of hyperplasia, together with CT and MR scans. We analyzed the behaviour of hypophyseal hyperplasia by using imaging techniques, and the differential aspects with regard to hypophyseal adenomas. Firm diagnosis is only made on anatomopathological study of the hypophysis. However, we consider that sound knowledge of the characteristics of this condition may help to establish the correct diagnosis and thus avoid unnecessary surgery. Conclusions. We review the information published in the literature on this subject, emphasizing the importance of differential diagnosis by means of imaging techniques
Casos clínicos Presentamos tres casos vistos en nuestro servicio, en los que se realizaron estudios hormonales y endocrinológicos para descartar causas conocidas de hiperplasia, así como TC y RM. Analizamos el comportamiento de la hiperplasia hipofisaria en las técnicas de imagen y sus aspectos diferenciales respecto a los adenomas hipofisarios. El diagnóstico definitivo lo proporciona únicamente el estudio anatomopatológico de la hipófisis, si bien consideramos que el buen conocimiento de las características de esta entidad puede ayudar a establecer el diagnóstico correcto y evitar cirugía innecesaria.
Conclusiones Se revisan los conocimientos publicados en la literatura respecto a este tema, destacando la importancia del diagnóstico diferencial mediante la técnicas de imagen
