Spontaneous Hypoglycemia After Islet Autotransplantation for Chronic Pancreatitis.

Context: Spontaneous hypoglycemia has been reported in patients after total pancreatectomy (TP) and islet autotransplantation (IAT) with maintained insulin independence. Details surrounding these events have not been well described.

Objective: The objective of the study was to determine the frequency and characteristics of spontaneous hypoglycemia in patients undergoing TP-IAT and/or to ascertain predictive or protective factors of its development.

AMERICAN ASSOCIATION OF CLINICAL ENDOCRINOLOGISTS AND AMERICAN COLLEGE OF ENDOCRINOLOGY POSITION STATEMENT ON THE ASSOCIATION OF TESTOSTERONE AND CARDIOVASCULAR RISK.

This document represents the official position of the American Association of Clinical Endocrinologists and the American College of Endocrinology. Where there were no randomized controlled trials or specific U.S.

PITUITARY MRI FINDINGS IN PATIENTS WITH PITUITARY AND ECTOPIC ACTH-DEPENDENT CUSHING SYNDROME: DOES A 6-MM PITUITARY TUMOR SIZE CUT-OFF VALUE EXCLUDE ECTOPIC ACTH SYNDROME?

Objective: Expert opinion and a consensus statement on Cushing syndrome (CS) indicate that in a patient with a clinical presentation and biochemical studies consistent with a pituitary etiology, the presence of a pituitary tumor ≥6 mm is highly suggestive of Cushing disease (CD). The purpose of the present study was to determine the optimal pituitary tumor size that can differentiate between patients with CD and ectopic adrenocorticotrophic hormone (ACTH) secretion (EAS) and obviate the need for inferior petrosal sinus sampling (IPSS).

Methods: We performed a retrospective study of 130 patients seen between 2000 and 2012 including 104 patients with CD and 26 patients with EAS.

Factors associated with islet yield and insulin independence after total pancreatectomy and islet cell autotransplantation in patients with chronic pancreatitis utilizing off-site islet isolation: Cleveland Clinic experience.

Context: Total pancreatectomy (TP) with islet cell autotransplantation (IAT) can reduce or prevent diabetes by preserving beta cell function and is normally performed with on-site isolation laboratory facilities.

Objective: We examined factors associated with islet yield and metabolic outcomes in patients with chronic pancreatitis undergoing TP-IAT. We report our experience of TP-IAT with an off-site islet isolation laboratory.

The clinical utility of free thyroxine in oral levothyroxine absorption testing.

Objective: Original absorption studies for levothyroxine (LT4) were validated using total thyroxine (TT4) measurements. Free thyroxine (FT4) has largely supplanted TT4 in clinical practice. The objective of our study was to assess the clinical utility of FT4 in oral LT4 absorption testing.

Biochemical and radiological relationships in patients with pheochromocytoma: lessons from a case control study.

Background: An elevation of fractionated plasma or urinary metanephrine (MN) or nor-metanephrine (NMN), collectively called metanephrines (MN and NMN), >4-fold above the upper limit of normal (ULN) is usually considered to be diagnostic for pheochromocytoma (PHEO). There are a greater number of false positive results when the elevations are more modest.

Aim: To identify biochemical and radiological features in PHEOs with modest elevations (<4-fold above ULN) of metanephrines.

Mody-3: novel HNF1A mutation and the utility of glucagon-like peptide (GLP)-1 receptor agonist therapy.

Objective: An estimated 1 to 2% of cases of diabetes mellitus have a monogenic basis; however, delayed diagnosis and misdiagnosis as type 1 and 2 diabetes are common. Correctly identifying the molecular basis of an individual's diabetes may significantly alter the management approach to both the patient and his or her relatives. We describe a case of mature onset diabetes of the young (MODY) with sufficient evidence to support the classification of a novel HNF1A (hepatocyte nuclear factor-1-α) mutation as a cause of MODY-3.

Liraglutide effective in the severely insulin-resistant patient with type 2 diabetes requiring U-500 insulin: a case report.

Background/objective: We describe the effectiveness of liraglutide therapy in a severely insulin-resistant patient with type 2 diabetes mellitus (DM-2) requiring U-500 insulin.

Subject And Methods: A 65-year-old morbidly obese man (body mass index, 67.3 kg/m(2); weight, 156.

Male hypogonadism: more than just a low testosterone.

Confronted with a low serum testosterone level, physicians should not jump to the diagnosis of hypogonadism, as confirmation and thorough evaluation are warranted before making the diagnosis or starting therapy. This review discusses how to approach the finding of a low testosterone value, stressing the need to confirm the finding, the underlying pathophysiologic processes, drugs that can be responsible, and the importance of determining whether the cause is primary (testicular) or secondary (hypothalamic-pituitary).

Prolactin measurement during inferior petrosal sinus sampling improves the localization of pituitary adenomas in Cushing's disease.

Objective: Inferior petrosal sinus sampling (IPSS) distinguishes pituitary-dependent Cushing's disease (CD) from ectopic ACTH syndrome with a high degree of certainty, but has not been reliable in predicting the location of an adenoma within the pituitary gland. We investigated whether prolactin measurements during IPSS would improve pituitary tumour localization.

Methods: Fifty-four patients with suspected ACTH-dependent Cushing's syndrome who underwent IPSS between 1997 and 2009 were studied retrospectively.

Pregnancy and acromegaly: a review.

To review the literature regarding the diagnosis and management of acromegaly during pregnancy. A systematic literature search was performed using MEDLINE including hand-searching reference lists from original articles. The diagnosis of acromegaly during pregnancy is made difficult due to the physiologic changes in pituitary GH secretion and IGF-1 production resulting from placental GH secretion and the inability of commercial assays to discriminate between pituitary and placental GH.

Insulin glargine use during pregnancy.

Objective: To review the literature regarding the use of insulin glargine during pregnancy, specifically addressing the issues and concerns surrounding mitogenicity, placental transfer, and maternal and fetal safety.

Methods: We performed a systematic literature search using MEDLINE and BIOSIS Previews up to March 2011. Additional studies were identified by hand-searching reference lists from original articles.

Hyperandrogenism in a postmenopausal woman: diagnostic and therapeutic challenges.

Objective: To describe a postmenopausal woman with severe hyperandrogenism who responded dramatically to a gonadotropin-releasing hormone (GnRH) agonist.

Methods: Detailed clinical and laboratory findings are presented, and the pertinent literature is reviewed.

Results: A 53-year-old postmenopausal woman with end-stage renal disease, who had undergone kidney transplantation, was referred because of high serum testosterone levels.

Reduction of false-negative results in inferior petrosal sinus sampling with simultaneous prolactin and corticotropin measurement.

Objective: To investigate the value of prolactin as an independent marker of catheter placement to improve the diagnostic accuracy of inferior petrosal sinus sampling (IPSS) in patients with corticotropin-dependent Cushing syndrome.

Methods: In this retrospective cohort study, we reviewed hospital records of patients who underwent IPSS procedures at the Cleveland Clinic between 1997 and 2009. Serum prolactin and plasma corticotropin levels were measured prospectively in peripheral and inferior petrosal sinus (IPS) samples.

Diagnostic characteristics of late-night salivary cortisol using liquid chromatography-tandem mass spectrometry.

Objective: The objective of the study was to describe the diagnostic performance of a commercially available late-night salivary cortisol (NSC) assay using liquid chromatography tandem mass spectrometry.

Methods: We retrospectively identified 90 patients who had one or more NSC determinations: 52 patients in whom Cushing syndrome (CS) was excluded or could not be confirmed [group 1 (G1)] and 38 patients in whom CS was confirmed [group 2 (G2)]. Eighteen healthy volunteers served as controls.

Change in adrenal mass size as a predictor of a malignant tumor.

Objective: To assess the value of adrenal mass absolute growth, growth rate, and percentage growth rate on serial imaging for distinguishing benign from malignant adrenal masses.

Methods: We retrospectively reviewed the Cleveland Clinic medical record data on 136 adrenalectomies or biopsies in 132 patients with 2 imaging studies performed more than 2 months apart (during 1997 to 2008).

Results: There were 111 benign (81.

Virilizing adrenal ganglioneuroma in a woman with subclinical Cushing syndrome.

Objective: To describe a patient with a virilizing adrenal ganglioneuroma and subclinical Cushing syndrome.

Methods: Detailed clinical, laboratory, radiologic, and pathologic findings are presented, and the pertinent literature is reviewed.

Results: A 56-year-old postmenopausal woman was referred for evaluation of a 3.

Poor correlation of serum alpha-subunit concentration and magnetic resonance imaging following pituitary surgery in patients with nonfunctional pituitary macroadenomas.

Objective: To review the clinical utility of measuring serum alpha-subunit as a marker for residual tumor in a group of patients with surgically resected nonfunctional pituitary adenomas.

Methods: In this retrospective cross-sectional chart review using the pituitary database at the Cleveland Clinic, we identified patients with nonfunctional pituitary macroadenomas over a 4-year period (2000-2004) and selected those patients who had an elevated alpha-subunit concentration measured before pituitary surgery. Presurgery and post-surgery measurements of alpha-subunit, luteinizing hormone, follicle-stimulating hormone, and thyroid-stimulating hormone were documented.