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Surgical Debulking of Pituitary Adenomas

This study has been completed.
Information provided by (Responsible Party):
New York University School of Medicine Identifier:
First received: June 9, 2011
Last updated: July 25, 2016
Last verified: July 2016
This is a randomized, multicenter trial with stratification done by a single radiologist at the coordinating center (NYU), and patients with comparable disease will be randomized to Sandostatin LAR treatment administered 1 time per month by IM injection for 3 months before (Arm A) or, for non-cured patients, after (Arm B) surgery. All patients will undergo transsphenoidal hypophysectomy. The impact of surgical debulking on responsiveness to Sandostatin LAR will be evaluated.The primary objective of this trial will be to determine whether surgery (debulking of pituitary adenomas) improves the response of patients with acromegaly to treatment with Octreotide LAR, when compared to Octreotide LAR therapy alone.

Condition Intervention Phase
Pituitary Adenoma
Drug: Octreotide LAR
Procedure: transsphenoidal surgery
Phase 4

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Open Label
Official Title: Does Surgical Debulking Of Pituitary Adenomas Improve Responsiveness To Octreotide LAR In The Treatment Of Acromegaly: An Investigator-Initiated Study

Resource links provided by NLM:

Further study details as provided by New York University School of Medicine:

Primary Outcome Measures:
  • Percentage of Responders (Primary Medical Treatment in Arm 1, Primary Surgical Treatment in Arm 2) [ Time Frame: 3 months ]
    Nadir growth hormone <1 ng/mL during a standard 2 hour oral glucose tolerance test using 75 g glucose and normal IGF-I according to age and gender-matched standards.

  • Percentage of Responders (All Treatments) [ Time Frame: 3 months ]
    Nadir growth hormone <1 ng/mL during a standard 2 hour oral glucose tolerance test using 75 g glucose and normal IGF-I according to age and gender-matched standards.

Secondary Outcome Measures:
  • Percentage of Responders (Only Including Surgical Failures in Arm 2) [ Time Frame: 3 months ]
    Nadir growth hormone <1 ng/mL during a standard 2 hour oral glucose tolerance test using 75 g glucose and normal IGF-I according to age and gender-matched standards.

Enrollment: 41
Study Start Date: April 2004
Study Completion Date: December 2011
Primary Completion Date: July 2010 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Active Comparator: Medical treatment by Octreotide LAR
Medical therapy with Octreotide LAR 30 mg/month for 3 months preceding surgery
Drug: Octreotide LAR
Active Comparator: Surgical debulking followed by Octreotide LAR
Surgical debulking of pituitary tumor followed by Octreotide LAR if not surgically cured
Drug: Octreotide LAR Procedure: transsphenoidal surgery

Detailed Description:
The current goal of treatment for people with acromegaly is normalization of both growth hormone (GH) and insulin-like-growth-factor-1 (IGF-1) levels. Normalization of GH and IGF-1 levels attenuates the morbidity (hypertension, cardiovascular disease, sleep apnea, increased cancer risk, arthritis) and increased mortality associated with persistent GH and IGF-1 elevation. The optimal approach to achieving these goals in patients with pituitary macroadenomas remains controversial. Available treatment modalities include transsphenoidal hypophysectomy, medical therapy (somatostatin analogues and/or dopaminergic agonists), radiotherapy, or a combination or these interventions. No randomized trials have been conducted to investigate whether surgical debulking of pituitary macroadenomas enhances the efficacy of medical therapy. This study is designed to rigorously investigate whether surgical debulking increases the efficacy of a long-acting depot somatostatin preparation, Sandostatin LAR, so that evidence-based optimal care may be offered to patients with acromegaly.

Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Carry a diagnosis of de novo acromegaly with an elevated age and sex matched IGF-I and GH >1ng/ml at all time points during OGTT
  • Have a pituitary macroadenoma
  • Have clinical changes consistent with acromegaly
  • Have a single random serum hGH of 12.5 ng/ml or greater
  • Both the endocrinologist and surgeon must agree that the patient's health would not be compromised by a three-month period during which time Octreotide LAR is administered.
  • Patients currently on dopamine agonist who agree to discontinue medication (2-6 week washout required)

Exclusion Criteria:

  • Pregnant or breastfeeding
  • Documented loss of vision due to pituitary tumor
  • Prior treatment for acromegaly other than dopamine agonists
  • Inability to complete the protocol
  • Intolerance to octreotide
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Please refer to this study by its identifier: NCT01371643

United States, New York
New York University School of Medicine
New York, New York, United States, 10016
Sponsors and Collaborators
New York University School of Medicine
Principal Investigator: David M Kleinberg, MD NYU School of Medicine
  More Information

Responsible Party: New York University School of Medicine Identifier: NCT01371643     History of Changes
Other Study ID Numbers: R11104
Study First Received: June 9, 2011
Results First Received: February 5, 2016
Last Updated: July 25, 2016

Additional relevant MeSH terms:
Pituitary Diseases
Pituitary Neoplasms
Neoplasms, Glandular and Epithelial
Neoplasms by Histologic Type
Hypothalamic Diseases
Brain Diseases
Central Nervous System Diseases
Nervous System Diseases
Endocrine System Diseases
Endocrine Gland Neoplasms
Neoplasms by Site
Hypothalamic Neoplasms
Supratentorial Neoplasms
Brain Neoplasms
Central Nervous System Neoplasms
Nervous System Neoplasms
Gastrointestinal Agents
Antineoplastic Agents, Hormonal
Antineoplastic Agents processed this record on May 23, 2017