Active clinical trials for "Pituitary Neoplasms"

The purpose of this study is to determine if patients with a history of nonsecreting pituitary adenomas with untreated GH deficient patients have profiles consistent with increased cardiovascular risk compared to patients without GH deficiency who have undergone similar surgery.

Transnasal transsphenoidal (TNTS) resection of pituitary tumors involves wide fluctuation in hemodynamic parameter and causes hypertension and tachycardia due to intense noxious stimuli during various stages of surgery. None of routinely used anesthetic agents effectively blunts the undesirable hemodynamic responses, and therefore usually there is a need to use increased doses of anesthetic agents. Dexmedetomidine (DEX) an α-2 adrenergic receptor agonist, because its sympatholytic and antinociceptive properties may ensure optimal intraoperative hemodynamic stability during critical moments of surgical manipulation. In addition, DEX reduced the anesthetic requirement with rapid recovery at the end of surgery. The main aim of the study was to evaluate the effect of DEX on perioperative hemodynamics, anesthetic requirements

We hypothesize that the effects of non-steroidal anti-inflammatory drugs (NSAIDS) for pain relief among patients with pituitary adenomas undergoing transnasal transsphenoidal surgeries are non-inferior to tramadol. We aim to launch a single-center randomized clinical trial to verify this hypothesis.

Use of dexmedetomidine in pituitary tumor resection surgery as adjuvant drug and its relation to cortisol levels during postoperative period.

The purpose of this study is to determine if a clear barrier placed over the eyes has any effect on goggle monitoring. When a patient has general anesthesia they lose the ability to blink and their eyes may dry. They may also lose the ability to keep their eyes fully closed. The anesthesiologist takes several steps to prevent injury to the eyes. First the eyes will be lubricated with ointment and the eyelids will be held in a closed position by the use of a clear barrier. During pituitary surgery it is the routine practice to perform many types of monitoring. One type of monitoring is to stimulate your eyes with a light. This helps your surgeon protect the nerve supply to your eyes. The light is supplied by a pair of goggles placed over your eyes during surgery. To help achieve our objective, the investigators are asking patients who are undergoing pituitary surgery to give us permission to record two sets of numbers form the monitoring device once prior to the application of the clear barrier and the second after the barrier is applied. This will be done when the patient is already asleep and will not be aware this is happening.

In this study, the investigators hypothesize that upfront gamma knife radiosurgery with drug therapy is superior in the treatment of growth hormone-secreting pituitary tumors after primary surgical treatment compared with the drug therapy alone. This study can provide useful clinical information in the treatment of patients with acromegaly.

Pituitary tumours have an estimated prevalence of 20% in the general population and the number of clinically relevant pituitary adenomas is increasing with time. When symptomatic, the standard of care required for pituitary adenomas is resection through an endoscopic transsphenoidal approach. There is however significant olfactory dysfunction following endoscopic transsphenoidal pituitary surgery with approximately 23% of patients reporting some degree of worsening in their sense of smell in the postoperative period. Pedicled nasoseptal flaps are used to repair skull base defects following resection of skull base tumours. The superior incision is placed in close proximity to olfactory mucosa. Currently, these flaps are raised either with the use of electrocautery or scalpel. The use of electrocautery in surgery has provided surgeons with greater hemostasis when compared to a scalpel. This is of utmost importance in many regions of the head & neck where highly vascularized tissue results in difficulties achieving adequate hemostasis and therefore limiting view of the surgical field. However, the use of electrocautery increases thermal damage to surrounding tissue and impairs wound healing when compared to a scalpel. Although the transmission of thermal energy via electrocautery to adjacent mucosa containing olfactory epithelium may theoretically contribute to olfactory disturbances, no prospective randomized controlled trials have yet examined the impact of these two different techniques on postoperative olfactory function. The purpose of this research study is to determine the effects, if any, of electrocautery versus scalpel on olfaction in raising the nasoseptal flap for repairing skull base defects following transphenoidal surgery.

This is a randomized, double-blind, placebo-controlled study to assess the safety, tolerability, efficacy, PK, and PD of the chimeric dopamine-somatostatin receptor agonist, TBR-760, in adult patients with NFPA over 52 weeks.

The purpose of this four-arm randomized controlled study is to determine whether eliminating glucocorticoids (GC) replacement in perioperative period in surgical patients with sellar lesion could result in similar or better outcomes comparing to traditional replacement therapy, regarding postoperative recovery of pituitary function and other postoperative complications (infection, pain, quality of life, recurrence). Surgical patients of our center with MRI-confirmed diagnosis of sellar lesion will be enrolled, insulin tolerance test (ITT) will be performed for assessment of the pituitary function at enrollment. Patients with normal pituitary function will be randomized into non-GC replacement group (group A) and low-dose GC replacement group (group B), while patients with impaired pituitary function will be randomized into low-dose GC replacement group (group C) and high-dose GC replacement group (group D). The primary outcome is the hypothalamic-pituitary-adrenal (HPA) -axis function of the patients, evaluated by plasma cortisol and adrenocorticotropic hormone (ACTH) levels. The secondary outcomes include the hypothalamic-pituitary-thyroid (HPT) axis function (TSH, thyroid-stimulating hormone, free T3, free T4), postoperative water-electrolyte balance, infection, recurrence and health-related quality of life.

Growth hormone secreting pituitary adenomas(GHomas) produce excessive GH, stimulating excessive insulin like growth factor 1(IGF-1) synthesis in the liver, thus causing multiple systemic complications. The life expectancy of patients with untreated GHomas is shortened by ten years. The treatment goal of GHomas is to shrink the tumor volume and normalize GH and IGF-1. Under current treatment, only 50-70% of patients get remission. Rosiglitazone is a widely used oral antidiabetic medicine. The investigator's preliminary data showed that rosiglitazone decreased the synthesis of GH and IGF-1 in rat pituitary tumor cells GH3 and hepatocytes respectively. The investigator plan to investigate the efficacy of rosiglitazone in the treatment of patients with GHomas who have not been alleviated by other therapies.