Mubarak Al-Gahtany, Eva Horvath, Kalman Kovacs
Pituitary hyperplasia is rare, difficult to diagnose and sometimes controversial. The hyperplasia could be physiologic which is usually reversible, or pathologic which varies in presentation from incidental to tumor like lesion with and without hormonal disturbance. Any pituitary cell is capable of undergoing hyperplasia in the presence of the right stimuli …
Kalliopi Pazaitou-Panayiotou, Eva Tiensuu Janson, Triantafyllia Koletsa, Vassiliki Kotoula, Mats Stridsberg, Georgios Karkavelas, Georgia Karayannopoulou
OBJECTIVE: Peptide receptor radionuclide therapy (PRRT) is dependent upon binding of radiolabelled peptides to their respective receptor expressing cells. The main objective of this study was to characterize the expression of somatostatin receptor (SSTR) subtypes in non-medullary thyroid …
Eleni Thodou, Theodore Argyrakos, George Kontogeorgos
OBJECTIVE: Galectin-3 (Gal-3) belongs to the family of carbohydrate-binding proteins with high affinity for galactoside and is involved in many biological processes including cell growth and differentiation, cell adhesion, tumor progression, apoptosis and metastasis. The aim of this study was to disclose differences in the expression of Gal-3 in silent …
Luca Foppiani, Vincenzo Secondo, Anselmo Arlandini, Paolo Quilici, Manlio Cabria, Patrizia Del Monte
Thyroid lymphoma is a rare disease which occurs mainly in elderly females. Most patients with thyroid lymphoma have Chronic Lymphocytic Thyroiditis (CLT), suggesting a role of chronic antigen stimulation in the development of the disease. We present two cases of thyroid Diffuse Large B-cell Lymphoma (DLBCL) diagnosed after surgery …
Fabio Rotondo, Antonio Di Ieva, Kalman Kovacs, Michael D. Cusimano, Luis V. Syro, Eleftherios P. Diamandis, George M. Yousef
OBJECTIVE: Human kallikrein-like peptidase 10 (KLK10), a serine protease, plays an important role in the regulation of cell proliferation and tumor growth. In this work, we investigated KLK10 immunoexpression in various types of surgically removed human pituitary tumors …
Fabio Rotondo, Michael Cusimano, Bernd W. Scheithauer, Claire Coire, Eva Horvath, Kalman Kovacs
We report the case of a 49-year-old woman presenting with Cushing disease and visual disturbance. An atypical, aggressive, invasive pituitary tumor regrew despite several surgeries. Detailed morphologic investigation by histology, immunohistochemistry and electron microscopy documented …
Fabio Rotondo, Angelo Rotondo, Mark Jentoft, Bernd W. Scheithauer, Luis V. Syro, Jorge H. Donado, James E. Tarara, Kalman Kovacs
OBJECTIVE: In pregnant women, the pituitary is enlarged and the prolactin (PRL) secreting cells increase in size and number. This PRL cell hyperplasia is associated with hyperprolactinemia. The aim of the present work was to investigate adenohypophysial vascularization and immunoexpression of vascular endothelial growth factor …
George Kontogeorgos, Eleni Thodou
OBJECTIVE: The term “null cell” adenoma was first proposed in 1980 to designate pituitary adenomas lacking clinical, biochemical and morphological markers to disclose their cell origin. DESIGN: The aim of this study was to investigate the presence of α- and β-gonadotropin subunits in clinically nonfunctioning pituitary tumors …