Pituitary tumors are not rare if prevalence rates from autopsy or radiological series are
considered; approximately 0.5% of all pituitary adenomas will come to medical attention …

BACKGROUND Pituitary adenomas display an array of hormonal and proliferative activity.
Once primarily classified according to size (microadenomas,< 1 cm; macroadenomas,≥ 1 …

Pituitary adenomas are considered benign tumors, but approximately 10% of them can have
an aggressive behavior and more rarely (0.2%) can present metastasis, being classified as …

The WHO categorizes pituitary tumours as typical adenomas, atypical adenomas and
pituitary carcinomas, with typical adenomas constituting the major class. However, the WHO …

Pituitary tumors are common and exhibit a wide spectrum of hormonal, proliferative and
invasive behaviors. Traditional classifications consider them malignant only when they …

Pituitary tumors are very complex and heterogeneous and have a very wide range of
proliferative and aggressive behaviors, and how to define and classify these tumors remains …

Pituitary adenomas are common intracranial tumors that are mainly considered as benign.
Rarely, these tumors can exhibit an aggressive behavior, characterized by gross invasion of …

Abstract The European Society of Endocrinology (ESE) survey reported on the largest cohort
of 125 aggressive pituitary tumours (APT) and 40 pituitary carcinomas (PC). Whilst the …

Abstract Background and Objective: In 2004, the World Health Organization defined atypical
pituitary adenomas as those with a Ki-67 expression> 3%, an excessive p53 expression and …

Pituitary adenomas (PAs) are a common subtype of intracranial tumors. The aim of the
present study was to analyse the clinical and pathological features of different types of …