Results 61 to 70 of about 514,858 (318)

Computational Intelligence Approach to Improve the Classification Accuracy of Brain Neoplasm in MRI Data [PDF]

arXiv, 2021
Automatic detection of brain neoplasm in Magnetic Resonance Imaging (MRI) is gaining importance in many medical diagnostic applications. This report presents two improvements for brain neoplasm detection in MRI data: an advanced preprocessing technique is proposed to improve the area of interest in MRI data and a hybrid technique using Convolutional ...
arxiv  

Pituitary Tumors: Genetic and Molecular Factors Underlying Pathogenesis and Clinical Behavior

Neuroendocrinology, 2021
Pituitary neuroendocrine tumors (PitNETs) are the most common intracranial neoplasms. Although generally benign, they can show a clinically aggressive course, with local invasion, recurrences, and resistance to medical treatment.
A. Spada, G. Mantovani, A. Lania, D. Treppiedi, F. Mangili, R. Catalano, G. Carosi, E. Sala, E. Peverelli   +8 more
semanticscholar   +1 more source

A case of pseudoprogression in avelumab maintenance therapy for metastatic bladder cancer

IJU Case Reports, Volume 6, Issue 1, Page 5-7, January 2023., 2023
Introduction A unique phenomenon of immune therapy is pseudoprogression; however, a definite mechanism and predictive factors remain unclear. We herein report a case of pseudoprogression with avelumab maintenance therapy. Case presentation A 67‐year‐old male diagnosed with muscle‐invasive bladder cancer with lung metastasis was treated with four cycles
Nozomi Hayakawa, Eiji Kikuchi
wiley   +1 more source

Radiation-associated sarcoma of the skull base after irradiation for pituitary adenoma

Rare Tumors, 2012
Secondary, radiation-induced neoplasms represent a significant long-term risk after radiation treatment, and radiation-induced sarcomas (RAS) have an especially poor prognosis. These have rarely been reported after irradiation for pituitary adenomas.
Cara L. Sedney, Jonathan M. Morris, Caterina Giannini, Michael J. Link, Keith M. Swetz   +4 more
doaj   +1 more source

Preoperative Volume Determination for Pituitary Adenoma [PDF]

, 2016
The most common sellar lesion is the pituitary adenoma, and sellar tumors are approximately 10-15% of all intracranial neoplasms. Manual slice-by-slice segmentation takes quite some time that can be reduced by using the appropriate algorithms. In this contribution, we present a segmentation method for pituitary adenoma.
arxiv   +1 more source

Neuropathology of Pituitary Adenomas and Sellar Lesions.

Neurosurgery, 2021
The pituitary gland is the site of numerous neoplastic and inflammatory processes. The overwhelmingly most frequent tumors arise from cells of the anterior lobe, the pituitary neuroendocrine tumors (PitNETs).
Peter J. Kobalka, Kristin Huntoon, A. Becker   +2 more
semanticscholar   +1 more source

A case of hypogonadtropic hypogonadism due to hypophysitis discovered by secondary male infertility

IJU Case Reports, Volume 6, Issue 1, Page 51-53, January 2023., 2023
Introduction The main causes of secondary male infertility are varicocele and aging. It is rarely caused by adult‐onset hypopituitarism. The onset of hypopituitarism is often due to brain tumors, trauma, surgery, or congenital disorders. Case presentation A 29‐year‐old man was admitted to the hospital with complaints of decreased libido and semen ...
Masatoshi Konishi, Yoko Maegawa, Masaru Tani, Toshihisa Asakura, Yujiro Hayashi, Yoichi Kakuta, Koichi Tsutahara, Kazuhiko Komori, Tetsuya Takao   +8 more
wiley   +1 more source

Mathematical models for order of mutation problem in myeloproliferative neoplasm: non-additivity and non-commutativity [PDF]

arXiv, 2023
In some patients of myeloproliferative neoplasm, two genetic mutations can be found: JAK2 V617F and TET2. When one mutation is present or not, the other mutation has different effects on regulating gene expressions. Besides, when both mutations are present, the order of occurrence might make a difference.
arxiv  

Relapse of the pituitary adenoma with a change of its hormonal activity in a female patient with multiple endocrine neoplasia syndrome type 1

Alʹmanah Kliničeskoj Mediciny, 2018
Multiple endocrine neoplasia syndrome type 1 (MEN1, Wermer's syndrome) is a group of heterogeneous inherited diseases, with its pathogenesis related to hyperplasia or neoplasms of several endocrine glands.
L. Ya. Rozhinskaya, P. M. Khandaeva, A. S. Lutsenko, A. M. Lapshina, A. Yu. Grigor'ev, S. D. Arapova, Zh. E. Belaya, G. A. Mel'nichenko   +7 more
doaj   +1 more source

The Impact of Surgical Telementoring on Reducing the Complication Rate in Endoscopic Endonasal Surgery of the Skull Base

Diagnostics
Background: Pituitary adenomas represent the most common pituitary disorder, with an estimated prevalence as high as 20%, and they can manifest with hormone hypersecretion or deficiency, neurological symptoms from mass effect, or incidental findings on ...
Janez Ravnik, Hojka Rowbottom, Carl H. Snyderman, Paul A. Gardner, Tomaž Šmigoc, Matic Glavan, Urška Kšela, Nenad Kljaić, Boštjan Lanišnik   +8 more
doaj   +1 more source