Faculty Bibliography

BACKGROUND:Patients with Cushing's syndrome (CS) have a high prevalence of cardiovascular disease, and other recognized risk factors for atrial fibrillation/flutter (AF/AFL); however, the prevalence of AF/AFL has not been well characterized in this population. METHODS:We conducted a retrospective matched-cohort study using the Clalit Health Services database, including patients with CS and 1:5 matched controls. We assessed the risk of new-onset AF/AFL overall and according to disease etiology and remission status. Pre-existing AF/AFL was defined as >30 days before CS, and new-onset as within 30 days or thereafter. RESULTS:The cohort included 609 patients with CS and 3018 controls. Pre-existing AF/AFL was more common among patients with CS than controls (3.6% vs. 2.1%; OR 1.70, 95% CI 1.04-2.78). During a mean follow-up of 15 years, patients with CS had a significantly higher risk of developing new-onset AF/AFL compared with controls (HR 1.55, 95% CI 1.19-2.03). This increased risk was observed in both Cushing's disease (CD) (HR 1.53, 95% CI 1.01-2.32) and adrenal CS (HR 1.70, 95% CI 1.06-2.74). AF/AFL risk did not significantly differ according to remission status, although a trend toward lower risk was observed. Multivariate analysis identified older age at diagnosis, male sex, hypertension, vascular disease, and higher BMI as predictors for new-onset AF/AFL. CONCLUSION/CONCLUSIONS:CS is associated with an increased risk of AF/AFL. This elevated risk is observed across both CD and adrenal CS and persists despite disease remission, underscoring the need for heightened awareness and close cardiovascular surveillance in this population. The increased risk of AF/AFL appears to be primarily driven by coexisting cardiovascular comorbidities rather than cortisol excess or other CS-specific features.

BACKGROUND AND OBJECTIVES/OBJECTIVE:Perioperative protocols facilitate earlier discharge without compromising safety in nonfunctioning pituitary adenomas, but no large multicenter studies in the United States have investigated protocols regarding Cushing disease (CD). We sought to characterize perioperative protocols and how their implementation influences clinical outcomes in patients with CD. METHODS:A retrospective analysis was conducted using data from the Registry of Adenomas of the Pituitary and Related Disorders consortium comprising 13 US academic pituitary centers. Institutions were surveyed regarding perioperative procedures for patients undergoing transsphenoidal tumor resection for CD. The impacts of institutional procedures and approaches to implementation on length of stay (LOS) and unplanned 90-day readmission were evaluated. RESULTS:Thirteen institutions contributed survey responses and clinical data for a total of 832 patients meeting inclusion criteria. Ten (76.9%) institutions reported having a postoperative protocol, 9 (69.2%) used a formal document to outline their protocol, and 3 (23.1%) had protocols implemented into hospital policy. Mean LOS was significantly reduced in centers with an established protocol (3.14 vs 3.42 days, P = .032), and more so with a formal document (3.10 vs 3.48 days, P = .001) or hospital policy (2.72 vs 3.36 days, P < .001). Patients treated after protocol implementation experienced shorter LOS (P < .001). Other factors associated with reduced LOS were presence of a separate CD pathway, intraoperative checklist specific to pituitary surgery, non-narcotic pain regimen, Foley removal order, dedicated outpatient advanced practice provider follow-up, and target discharge date ≤2 days. Intraoperative checklist (P = .045), non-narcotic pain regimen (P = .048), nasal packing (P = .005), and 1-day target discharge date (P = .032) were important factors against readmission. Compared with microscopic surgery, endoscopic surgery was associated with shorter LOS but increased readmission odds. CONCLUSION/CONCLUSIONS:This is the first multicenter study to illustrate that implementation of perioperative protocols is associated with a reduction in LOS and readmission risk in patients with CD.

INTRODUCTION/UNASSIGNED:are common in these tumors, yet their diagnostic, prognostic, and therapeutic implications are less clear. METHODS/UNASSIGNED:mutations versus those without at our affiliated institution, NYU Langone Health. RESULTS/UNASSIGNED:+ tumors were older at the time of surgery and most classified as mammosomatotroph adenomas on pathology. CONCLUSIONS/UNASSIGNED:+ tumors. SYSTEMATIC REVIEW REGISTRATION/UNASSIGNED:https://www.crd.york.ac.uk/prospero/, identifier CRD420251107763.

BACKGROUND/UNASSIGNED:Acromegaly is a rare endocrine disorder characterized by chronic excess growth hormone (GH) and elevated insulin-like growth factor-1 (IGF-1), which are known to have mitogenic and anti-apoptotic effects on breast tissue. While an increased risk of several malignancies has been observed in patients with acromegaly, the relationship between acromegaly and breast cancer remains unclear. OBJECTIVE/UNASSIGNED:To systematically evaluate the incidence and prevalence of breast cancer in patients with acromegaly and assess whether a consistent oncologic risk exists in this population. METHODS/UNASSIGNED:We systematically searched PubMed, EMBASE, and Web of Science from inception through early 2025 for studies reporting breast cancer in acromegaly. Citation tracking identified additional reports. After screening, 24 studies (>17,000 patients) were included, with data on cancer frequency, timing, and GH/IGF-1 levels extracted for analysis. From a subset of these studies reporting standardized incidence ratios (SIR) with 95% confidence intervals (CIs), a random-effects meta-analysis was performed to generate a pooled SIR, accounting for between-study heterogeneity. RESULTS/UNASSIGNED:This systematic review of 24 studies with diverse designs, encompassing 17,413 patients with acromegaly, found breast cancer prevalence ranging from 0.42% to 5.85%. Several studies reported elevated GH and IGF-1 levels at any cancer diagnosis, but methodological heterogeneity limited conclusions on dose-response or temporal associations. Ten studies reported SIRs with 95% CIs and were included in the pooled analysis. The pooled SIR for breast cancer among patients with acromegaly was 1.20 (95% CI: 0.94-1.54), with moderate heterogeneity (I² = 58%). CONCLUSION/UNASSIGNED:Although there is a strong biological rationale for a link between GH/IGF-1 excess and breast cancer, current clinical studies have not shown a clear or consistently increased risk in patients with acromegaly. The mixed results likely reflect issues such as surveillance bias, differences in study designs, and limited adjustment for confounders. For now, breast cancer screening in this population should generally follow the same guidelines as the general population, with perhaps closer attention in patients who have poorly controlled disease. Moving forward, well-designed prospective studies that track cancer outcomes in relation to biochemical disease activity and control will be key to answering this question.

The majority of prolactinomas are treated with dopamine agonists (DA) with excellent response, however DA-resistance occurs in 10% of prolactinomas. Somatostatin (SST) receptors have been increasingly studied in prolactinomas. There are five SST receptor subtypes and a significant number of prolactinomas show expression of SST₅ and SST₁ mRNA. The somatostatin analog (SSA) pasireotide, which has 40-fold greater binding affinity to SST₅ compared to first-generation SSAs, shows promising results in case reports of DA-resistant prolactinomas. This two-center retrospective cohort study investigated the expression patterns of dopamine 2 (D2R), SST₂ and SST₅ receptors in surgical specimen of 34 patients with prolactinomas, 22 of which were DA-resistant. In vitro effects of cabergoline, octreotide and pasireotide on prolactin production was also examined in cultured prolactinoma cells. Receptor expression was scored using the immunoreactivity score (IRS). 31/34(91%) patients used DA preoperatively; 22/34(64.7%) were DA-resistant. Receptor expression in the cases was 97.1% for D2R, 70.6% for SST₅ and 41.2% for SST₂. In the majority of SST₂ positive cases SST₂ expression was very low. In in vitro studies comparing the effects of octreotide, pasireotide, and cabergoline on prolactin secretion, octreotide was the least potent drug and cabergoline was the most potent. SST₅ and D2R expression was highest in prolactinomas showing the highest response to pasireotide and cabergoline in vitro (median D2R IRS 1.0 vs 8.0 for < 50% vs. > 50% inhibition by cabergoline and median SST₅ IRS 3.5 avs. 12.0 for < 50% vs. > 50% inhibition by pasireotide). In a subgroup, pasireotide inhibited prolactin secretion with comparable potency to cabergoline. Targeting SST₅ with pasireotide may be a potential treatment modality for further clinical investigation in the treatment of a subset of DA resistant or intolerant prolactinomas.

PURPOSE/OBJECTIVE:Data on mortality risk in patients with hyperprolactinemia is limited. This study aimed to evaluate all-cause mortality in a cohort of dopamine agonist (DA)-treated patients with hyperprolactinemia. METHODS:A nationwide retrospective study (2000-2023) using the Clalit Health Services database evaluated all-cause mortality in patients with DA-treated hyperprolactinemia, matched 1:5 with controls by age, sex, socioeconomic status, and BMI. The primary outcome was all-cause mortality. Secondary outcomes included the impact of hyperprolactinemia severity, prolactin (PRL) normalization, and other mortality risk factors. RESULTS:The study included 2,492 patients with hyperprolactinemia (mean age ± SD:38.7 ± 14.8 years, 59.6% women) and 12,456 controls (38.7 ± 14.8 years, 59.6% women). Over > 17 years of follow-up, 182 patients (7.3%) and 936 controls (7.5%) died (HR = 0.972, 95% CI 0.829-1.139), with similar mean age at death. Causes of death in both groups were mainly infectious, cardiovascular, and malignancies. Compared to controls, patients achieving PRL normalization within 1 year had lower mortality (HR = 0.730), while those without normalization had similar risk. Patients with baseline PRL < 5×ULN had lower mortality (6.9% vs. 7.9%, HR = 0.725) than those with ≥ 5×ULN. Mortality was higher in men than in women with hyperprolactinemia but not versus controls. Independent predictors for all-cause mortality included older age, higher BMI, male sex, heart failure, malignancy, hypertension, diabetes, and ischemic heart disease. CONCLUSION/CONCLUSIONS:All-cause mortality in patients with DA-treated hyperprolactinemia is not increased compared to matched controls, however is higher in men vs. women. Mortality is primarily influenced by age, sex, BMI, and comorbidities. Achieving PRL normalization within a year decreases mortality compared with controls.

Cushing's disease (CD) is an endogenous hypercortisolism state caused by an adrenocorticotropic hormone secreting pituitary adenoma. CD is associated with vast comorbidities and has a significant detrimental effect on quality of life as well as longevity. First line treatment for CD is transsphenoidal surgery (TSS) while medical therapy is an important second line treatment in cases of TSS failure or infeasibility. Current existing medications for CD target different processes related to CD including the corticotroph adenoma, cortisol adrenal manufacturing mechanisms, and glucocorticoid receptor blockage and widely differ in advantages as well as adverse effects. In depth acquaintance with the specific characteristics of each drug is needed in order to provide patients with the appropriate therapy according to their specific needs.

Cushing's disease (CD) is an endogenous hypercortisolism state caused by an adrenocorticotropic hormone (ACTH) secreting pituitary adenoma. Medical therapy is an important second-line treatment for CD. New pharmacologic agents for the treatment of patients with CD are under development. New possible intervention targets include various receptors and pathways in the corticotroph tumor, the hormone ACTH, and its receptor and enzymes involved in cortisone metabolism. This part of the article will focus on tailoring pharmacologic therapy according to patient specific characteristics, long-term medical therapy and development of new drugs for CD.

PURPOSE/OBJECTIVE:Clinical screening systems (CSSs) for Cushing syndrome (CS) validated in Europe have not been evaluated for CS or Cushing disease (CD) in the United States (US). We aimed to evaluate existing CSSs in US patients and develop two new symptom-based CSSs to identify patients with high pre-test probability of disease warranting referral for definitive biochemical workup-one for broad CS screening and one specifically for CD. METHODS:Data were obtained from the Registry of Adenomas of the Pituitary and Related Disorders (RAPID)-comprising 615 patients who underwent transnasal transsphenoidal resection for CD at one of 11 US pituitary centers, the Centers for Disease Control and Prevention's 2019 National Health Interview Survey (NHIS)-comprising 31,997 US respondents, and a single institution CD-NFA cohort-comprising 468 US patients diagnosed with either CD (n = 385) or nonfunctioning adenoma (n = 83). The RAPID Community Cushing CSS was derived from differences between the RAPID and NHIS cohorts, and the RAPID CD CSS from differences between patients with CD versus NFA. RESULTS:In external validation using US-based cohorts, the RAPID Community CSS achieved an AUC of 0.707, compared to the Spanish (AUC = 0.691) and Italian (AUC = 0.685) models, and the RAPID CD CSS demonstrated greater external sensitivity (0.836, threshold = 0.5) at the Youden-optimized threshold than the Spanish (0.605, threshold = 4) and Italian (0.735, threshold = 6) CSSs. CONCLUSIONS:In US patient populations, the RAPID Community Cushing CSS demonstrated superior discriminative ability for CD compared to the Italian and Spanish CSSs, and the RAPID CD CSS achieved the highest sensitivity for CD among all CSSs evaluated.