Invasive adenomas show pathologic or radiological signs of invasion to the cavernous or
sphenoid sinuses, bone, or nasal mucosa. WHO classification categorizes pituitary …

Although almost all pituitary tumors are benign adenomas, a surprisingly large number of
these tumors invade tissues outside of the pituitary gland. Such invasion, by itself, is not …

Pituitary adenomas comprise approx 10% of all intracranial tumors. Taking their origin in the
anterior lobe, most grow in a slow, expansible manner and are composed of cytologically …

Pituitary adenomas originating in adenohypophysial cells represent the most common
neoplasms of the sella turcica. The pathologist's goal is the optimal diagnosis and …

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 …

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 …

Although most pituitary adenomas behave in a purely benign fashion, microscopic invasion
of the subjacent dura is very common, and clinically overt infiltration of the surrounding dura …

Many factors influence the proliferation of pituitary adenomas: angiogenesis, apoptosis,
growth factors, oncogenes, tumor suppressor genes, and hormone receptors. These …

Pituitary carcinomas are rare pituitary tumors that by definition have cerebrospinal and/or
systemic metastases. Most of the tumors occur in the setting of multiple recurrences of …

Of the diverse neoplasms affecting the sellar region, pituitary adenomas are by far the most
common. Their pathologic features are the substance of the present chapter, which is limited …