Read by QxMD icon Read


Nauman S Chaudhry, Michael R Raber, David J Cote, Edward R Laws
Rathke's cleft cysts (RCC) are benign cystic lesions that originate from remnants of the epithelial lining of Rathke's pouch. RCC are known rarely to occur together with a concomitant pituitary adenoma. Here, we report a patient with a pituitary adenoma arising in the same location as a previously-resected RCC, 3 years post-operatively, and review the literature of "collision" sellar lesions. Consecutive transsphenoidal operations from a single-center between 2008 and 2016 were reviewed to identify patients with pituitary adenoma arising after surgical resection of RCC, and a systematic search of the literature was also performed to identify such patient reports, as well as reports of concomitant pituitary adenoma and RCC...
November 2016: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
Sayaka Aizawa, Yuriko Higaki, Amrita Dudaui, Mai Nagasaka, Sumio Takahashi, Ichiro Sakata, Takafumi Sakai
The adenohypophysis is formed from the oral ectoderm and consists of the pars distalis (PD), pars intermedia, and pars tuberalis (PT). The mechanisms of PD development have been extensively studied, and the cellular differentiation of the PD is well understood. However, the morphogenesis and differentiation of the PT are still unclear, and the genes expressed during PT development remain largely unknown. We have explored genes specifically expressed in the PT during embryonic development and analyzed their spatiotemporal expression patterns...
September 3, 2016: Cell and Tissue Research
Shannon Coy, Ziming Du, Shu-Hsien Sheu, Terri Woo, Fausto J Rodriguez, Mark W Kieran, Sandro Santagata
Cilia are highly conserved organelles, which serve critical roles in development and physiology. Motile cilia are expressed in a limited range of tissues, where they principally regulate local extracellular fluid dynamics. In contrast, primary cilia are expressed by many vertebrate cell types during interphase, and are intimately involved in the cell cycle and signal transduction. Notably, primary cilia are essential for vertebrate hedgehog pathway activity. Improved detection of motile cilia may assist in the diagnosis of some pathologic entities such as Rathke's cleft cysts, whereas characterizing primary cilia in neoplastic tissues may implicate cilia-dependent signaling pathways as critical for tumorigenesis...
August 26, 2016: Modern Pathology: An Official Journal of the United States and Canadian Academy of Pathology, Inc
Ioannis Petrakakis, Ariyan Pirayesh, Joachim K Krauss, Peter Raab, Christian Hartmann, Makoto Nakamura
OBJECTIVE: Apart from the "common" lesions (e.g. pituitary adenomas, Rathke's cleft cysts, meningiomas and craniopharyngiomas), there is a plethora of rare tumors or tumor-mimicking lesions in the sellar and suprasellar region (SSR). Due to a lack of characteristic imaging features, there is a dilemma in distinguishing these rare lesions from the more "common" ones preoperatively. Consequently, both diagnosis and definition of surgical goals, as well as further treatment strategies continue to be challenging for all attending physicians...
October 2016: Clinical Neurology and Neurosurgery
Seungjoo Lee, Jun Ho Choi, Chang Jin Kim, Jeong Hoon Kim
OBJECT: Hypophysitis is a rare disease entity mimicking a pituitary adenoma. In spite of crucial disease involving a pituitary gland which is a main component of hormonal axis, there have been minimal researches regarding the hypophysitis. In this study, we described the constellation of the preoperative findings including clinical, radiologic, and endocrinologic features, as well as postoperative outcomes of the hypophysitis. METHODS: The authors reviewed the data retrospectively of a total of 2,814 patients who underwent microsurgery due to pituitary mass lesion (Asan Medical Center)...
July 28, 2016: World Neurosurgery
Ryuta Yoshida, Tohru Naruse
A new rhizocephalan species, Peltogaster unigibba n. sp., is described from the host hermit crab, Pagurixus boninensis (Melin, 1939), from the Bonin Islands, Japan. Of the16 known species of Peltogaster now currently recognised, P. unigibba n. sp., and P. contorta Boschma, 1958 share a left lobe that projects beyond the mantle aperture. The two species can be distinguished from one another by the position of the opening of the mantle aperture. The new species most closely resembles P. naushonensis Reinhard, 1946 in its internal structure, but clearly differs in the relative length of the colleteric glands...
2016: Zootaxa
Roberto Altieri, Valentina Tardivo, Paolo Pacca, Valentina Pennacchietti, Federica Penner, Diego Garbossa, Alessandro Ducati, Massimiliano Garzaro, Francesco Zenga
The introduction of modern endoscopy in neurosurgery brought light to one of the darkest areas: the skull base. In particular, the trans-nasal route allowed skull base surgeons to visualize and dominate the entire midline skull base. We analyzed our surgical series of 199 patients that were affected by several pathologies (pituitary adenomas, clivalchordomas, craniopharyngioma, Rathke's cleft cysts, tuberculum sellaemeningiomas, and craniovertebral junction pathologies with bulbar compression) and treated each by using a 3D-HD endoscope between December 2012 and December 2015 and reviewed the literature...
July 29, 2016: Surgical Technology International
Vivian Thimsen, Annett Hölsken, Michael Buchfelder, Jörg Flitsch, Rudolf Fahlbusch, Harald Stefanits, Marco Losa, David T W Jones, Rolf Buslei
The epithelial cell adhesion molecule (EpCAM) is a type I glycoprotein located on the surface of epithelial cells. It is strongly expressed in many neoplasms and already used in the diagnosis and distinction of various tumour subtypes. Comparative studies about EpCAM expression in cystic sellar lesions are lacking. Therefore, we analysed its distribution pattern in adamantinomatous (aCP) and papillary (pCP) craniopharyngiomas (CP) and Rathke's Cleft Cysts (RCC) using immunohistochemistry and gene expression profiling...
2016: Scientific Reports
Dheeraj K Singh, Bernd Rathke, Johannes Kiefer, Arnulf Materny
Quantum chemical theory (DFT and MP2) and vibrational spectroscopy (ATR-IR and Raman) were employed to investigate the electronic structure and molecular interactions in the room-temperature ionic liquid 1-ethyl-3-methylimidazolium trifluoromethanesulfonate. Various possible conformers of a cation-anion pair based on their molecular interactions were simulated in the gas phase. All the different theoretical (MP2, B3LYP, and the dispersion-corrected wB97XD) methods assume the same ion-pair conformation for the lowest energy state...
August 11, 2016: Journal of Physical Chemistry. A
Yi Liu, Chao-Hu Wang, Dan-Ling Li, Shi-Chao Zhang, Yu-Ping Peng, Jun-Xiang Peng, Ye Song, Song-Tao Qi, Jun Pan
Whether a mixed type of craniopharyngioma (CP) exists and whether papillary craniopharyngioma (pCP) is on a histopathological continuum with Rathke's cleft cyst (RCC) remain controversial. Herein, we examined the expression and localization of β-catenin, BRAF p.V600E (V600E), and triggering receptor expressed on myeloid cells-1 (TREM-1) in 58 samples including 20 pCPs, 26 adamantinomatous craniopharyngiomas (aCP), and 12 RCCs. Five aCPs were diagnosed with mixed type CPs and the remaining 21 cases were pure aCPs...
July 8, 2016: Oncotarget
Jennifer L Quon, Peter H Hwang, Michael S B Edwards
INTRODUCTION: Transnasal endoscopic transphenoidal approaches are an essential technique for the resection of skull base tumors in adults. Originally devised and most commonly used to treat pituitary adenomas, they have also been used for a variety of other pathologies. However, in the pediatric population, sellar and suprasellar lesions have historically involved a craniotomy. Transnasal endoscopic transphenoidal techniques in children have only been reported as single case reports and only in regard to purely sellar lesions...
August 2016: Neurosurgery
Yasuhiko Hayashi, Daisuke Kita, Issei Fukui, Yasuo Sasagawa, Masahiro Oishi, Michiko Okajima, Osamu Tachibana, Mitsutoshi Nakada
INTRODUCTION: Symptomatic Rathke cleft cysts (RCCs) are rarely detected in neuroradiological screening and are less commonly found in children than in adults. However, when RCCs are observed in children, it is important to carefully distinguish a RCC from a cystic craniopharyngioma (CP) even if surgically treated or conservatively followed up. METHODS: We conducted a retrospective review of clinical data from 11 patients with symptomatic RCCs whose ages were under 18 years and compared the data with data from 15 age- and sex-matched patients with cystic CP who were treated at our institute...
September 2016: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
Zachary Rasmussen, Kingsley O Abode-Iyamah, Patricia Kirby, Jeremy D W Greenlee
Rathke's cleft cysts (RCC) are sellar lesions that typically remain asymptomatic throughout life. Symptomatic patients present with headache, visual disturbance and/or pituitary dysfunction and are treated with resection. We present a 61-year-old woman diagnosed with RCC which was resected twice then recurred before undergoing spontaneous resolution. RCC are often managed without surgical intervention. Some of these lesions may spontaneously resolve without surgical intervention while others may become symptomatic...
October 2016: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
T Rathke, T Wollersheim, M Krebs, M Schülke, S Weber-Carstens
No abstract text is available yet for this article.
December 2015: Intensive Care Medicine Experimental
Domenico Solari, Roberta Morace, Luigi M Cavallo, Francesca Amoroso, Gilda Cennamo, Marialaura Del Basso DE Caro, Paolo Cappabianca
Craniopharyngiomas are disembryogenetic, benign, tumors that origin from squamous epithelial remnants of Rathke's pouch, developing from any segment of its course, virtually from rhino-pharynx to the hypothalamus. Historically, different microscopic transcranial routes, have been advocated as possible surgical options for the treatment of craniopharyngiomas. The endonasal technique offers a direct approach that permits access to the suprasellar, retrosellar and retroclival space, obviating brain retraction; it provides the advantage of appraoching cranioopharyngiomas without optic nerve manipulation and/or retraction...
December 2016: Journal of Neurosurgical Sciences
Jill Samis, Elio F Vanin, Simone Treiger Sredni, Maria de Fátima de Bonaldo, Fabricio F Costa, Tadanori Tomita, Reema Habiby, Donald Zimmerman, Marcelo B Soares
PURPOSE: Craniopharyngiomas are benign tumors of the sellar or parasellar regions. They arise from the remnants of Rathke's pouch and are considered a "developmental disease." microRNAs are short non-coding RNAs that play a key regulatory role in the control of expression of entire gene networks. We performed an extensive analysis of miRNAs in craniopharyngiomas aiming to identify a miRNA expression signature that might aid in the prognosis of disease progression and outcome. METHODS: Thirty-seven craniopharyngioma samples from twenty-three patients, ten age-matched controls from autopsy, and ten infant controls from the developing pituitary from autopsy were evaluated for the expression of 754 miRNAs using TaqMan® Low Density Arrays (TLDAs) v2...
September 2016: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
Hidetaka Suga
The hypothalamic-pituitary system is essential for maintaining life and controlling systemic homeostasis. The functional disorder makes patients suffer from various symptoms all their lives. Pluripotent stem cells, such as embryonic stem (ES) cells and induced pluripotent stem (iPS) cells, differentiate into neuroectodermal progenitors when cultured as floating aggregates under serum-free conditions. Recent results have shown that strict removal of exogenous patterning factors during the early differentiation period induces rostral hypothalamic-like progenitors from mouse ES cells...
August 31, 2016: Endocrine Journal
Shannon W Davis, Amanda H Mortensen, Jessica L Keisler, Amanda L Zacharias, Philip J Gage, Ken-Ichi Yamamura, Sally A Camper
BACKGROUND: The pituitary gland is a highly vascularized tissue that requires coordinated interactions between the neural ectoderm, oral ectoderm, and head mesenchyme during development for proper physiological function. The interactions between the neural ectoderm and oral ectoderm, especially the role of the pituitary organizer in shaping the pituitary precursor, Rathke's pouch, are well described. However, less is known about the role of head mesenchyme in pituitary organogenesis. The head mesenchyme is derived from definitive mesoderm and neural crest, but the relative contributions of these tissues to the mesenchyme adjacent to the pituitary are not known...
2016: BMC Developmental Biology
Elisabeth Sabine Klaus, Nicola Helena Gonzalez, Martin Bergmann, Marek Bartkuhn, Wolfgang Weidner, Sabine Kliesch, Christina Rathke
Much of spermatid differentiation takes place in the absence of active transcription, but in the early phase, large amounts of mRNA are synthesized, translationally repressed, and stored. Most nucleosomal histones are then degraded, and chromatin is repackaged by protamines. For both transcription and the histone-to-protamine transition in differentiating spermatids, chromatin must be opened. This raises the question of whether two different processes exist. It is conceivable that for initiation of the histone-to-protamine transition, the already accessible, actively transcribed chromatin regions are utilized or vice versa...
July 2016: Biology of Reproduction
Yuping Peng, Jun Fan, Yu Li, Mingxin Qiu, Songtao Qi
OBJECTIVE: To evaluate the feasibility of the supraorbital keyhole approach for suprasellar or intrasuprasellar Rathke cleft cysts (RCCs) under pure endoscopic visualization. METHODS: Thirteen surgically treated patients with symptomatic RCCs were analyzed retrospectively. Preoperative manifestations included headache (77%), visual impairment (38%), polyuria (31%), and pituitary dysfunction (15%). The maximal cyst diameter averaged 29.3 mm (23-46 mm). Eight patients (62%) had a purely suprasellar lesion, and 5 (38%) had a sellar lesion with suprasellar extension...
August 2016: World Neurosurgery
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"