The changing landscape of acromegaly - an epidemiological perspective

Prevalence and risk factors of colon polyps and other colonic lesions in acromegaly: Insights from colonoscopy screening

PURPOSE

The existing data on colon lesions in acromegaly is notably heterogeneous. This study aimed to analyze the endoscopic and histopathological characteristics of colon polyps and other colonic lesions in acromegaly patients.

METHODS

This case-control study included 192 acromegaly patients and 256 controls. Colon polyps were categorized based on their size and histopathological classification. Colon malignancies and other colonic lesions, such as anal fissures, hemorrhoids, and diverticulosis, were also documented.

RESULTS

The prevalence of colon polyps was higher in the acromegaly group than in controls (p = 0.003), however, no differences were observed in the number, size, or histopathological subtypes of the polyps. Polyps in acromegaly patients were predominantly located in the distal colon and rectum. Multiple polyp locations and histopathological subtypes were more frequent in the control group (p = 0.042 and p = 0.018). Rates of low-grade dysplasia, high-grade dysplasia, and malignancy were similar between groups. Anal fissures were more common in the acromegaly group, whereas diverticulosis was less frequent (p = 0.001 and p < 0.001; respectively). Logistic regression analysis identified no significant clinical or laboratory predictors for colon polyps in acromegaly.

CONCLUSION

Patients with acromegaly exhibited a higher prevalence of colon polyps, predominantly located in the distal colon, which typically displayed a single histopathological subtype. No increased rates of colonic dysplasia, colon cancer, or other colonic lesions were observed in patients with acromegaly, except for an elevated prevalence of anal fissures.

Psychiatric morbidity in acromegaly: a cohort study and meta-analysis of the literature

PURPOSE

We aimed to evaluate the risk of psychiatric disorders through a retrospective cohort study comparing acromegaly and non-functioning pituitary adenomas (NFPAs) and a meta-analysis of existing literature.

METHODS

The cohort study included data from patient records analyzed using Chi2-, T-tests and binary regression. The meta-analysis included studies retrieved from PubMed, Embase and PsycINFO that reported risk of psychopathology in acromegaly compared to NFPA or healthy controls, using a random effects model.

RESULTS

The study population comprised 105 acromegaly and 211 NFPA patients, with similar sex distributions. Patients with acromegaly presented with smaller pituitary adenomas (17.9 (SD: 9.9) mm vs. 22.9 (SD: 10.6) mm, p < 0.001), more frequent pituitary surgery (89.1 vs. 60.2%, p < 0.001) and hormone replacement therapy (25.7 vs. 16.1%, p = 0.042). Acromegaly patients had higher risk of depression (RR: 1.9, CI95% [1.2-3.2], p = 0.009), and increased need of admissions to the psychiatric ward (5.7 vs. 0.5%, p = 0.006). The relative risk of anxiety was 1.4 (CI95% [0.5-4.4], p = 0.53). Daily opioid use was higher in acromegaly patients with psychiatric morbidity which was associated with a diagnosis of arthropathy (p = 0.009). From the meta-analysis (8 studies, 1387 patients) an increased risk of depression (RR:1.8, CI95% [1.3-2.5]) and anxiety (RR:1.9, CI95% [1.1-3.2]) was observed in acromegaly compared to NFPAs.

CONCLUSION

This study reveals a higher risk of psychiatric disorders in acromegaly, particularly depression and anxiety. Consequently, a need for increased psychiatric awareness in acromegaly is warranted.

Musculoskeletal disease in acromegaly-a population-based registry study

OBJECTIVE

Acromegaly is associated with multiple musculoskeletal complications that affect the quality of life and work ability. We aimed to examine the risk of osteoarthritis, musculoskeletal surgery (including joint replacement), osteoporosis, fractures, and analgesic consumption in Danish acromegaly patients.

DESIGN

National, registry-based cohort study.

METHODS

All validated incidents and prevalent cases of acromegaly in the period 1977-2021 (n = 844) were included and matched 1:100 with healthy controls. Outcomes were identified using diagnosis, surgical procedure, and medication codes and analyzed using Cox regression and Kaplan-Meier plots.

RESULTS

Patients were at significantly increased risk of osteoarthritis of the shoulder [hazard ratio (HR): 5.25 (3.05; 9.06)], hip [HR: 3.15 (2.57; 3.87)], and knee [HR: 2.25 (1.85; 2.72)], and medically treated osteoporosis [HR: 2.13 (1.64; 2.78)] even before acromegaly diagnosis. The risk of joint replacement surgery of the shoulder [HR: 4.60 (2.57; 8.25)], hip [HR: 3.32 (2.67; 4.12)], and knee [HR: 2.52 (1.89; 3.36)] was increased in acromegaly patients, as was the risk of being prescribed weak analgesics [HR: 1.22 (1.04; 1.44)] or opioids [HR: 1.58 (1.38; 1.82)]. Surgical complications [HR: 2.19 (1.59; 3.03)] and repeat hip surgery [HR: 3.64 (2.09; 6.34)] also exhibited increased risk in patients.

CONCLUSION

In acromegaly, severe osteoarthritis involving multiple joints develops even before acromegaly diagnosis and continues to progress over time after acromegaly treatment. Furthermore, acromegaly imposes an increased risk of medically treated osteoporosis, musculoskeletal surgery-particularly joint replacement surgery-, surgical complications, and the necessity of analgesic medication. Our findings warrant further research into the management of musculoskeletal disease in acromegaly.

Comparative mortality in pituitary adenomas subtypes: a tertiary referral center study

PURPOSE

Mortality in pituitary adenomas (PAs) has been extensively compared to general population. However, direct comparisons between PA subtypes are scarce. We aimed to compare mortality in various subtypes of PA (acromegaly, Cushing's disease (CD), macroprolactinomas and non-functioning pituitary macroadenomas (MacroNFPA)), within a single referral center.

METHODS

We retrospectively analyzed mortality and survival time in all 962 PAs admitted in our department between 2011 and 2023: acromegaly (n = 306), CD (n = 69), macroprolactinoma (n = 168) and MacroNFPA (n = 419).

RESULTS

Median follow-up was 10.2 (5.2, 15.2) years. The overall survival probability was 90.9% and 78.1% after 10 and 20 years respectively with age at diagnosis as the only significant predictor. There were no significant differences in survival probability between various PA subtypes in the whole cohort. In patients over 45 years of age at diagnosis there was a significant difference in survival probability between the four groups (p = 0.01) in the first 15 years of follow-up. In head-to-head comparisons CD had a significantly higher mortality risk than patients with acromegaly (HR 3.38 [CI 95% 1.07 to 10.60]) even after adjusting for age and sex.

CONCLUSION

Patients diagnosed with CD after 45 years of age have a significantly lower survival probability than other PA subtypes in the first 15 years of follow-up. All other PA subtypes had a similar survival probability after adjusting for age and sex. Due to advances in medical treatment of hormone secreting tumors, mortality in patients with PAs might increasingly depend more on tumor mass than on hormonal hypersecretion.

Myocardial Mechanics in Acromegaly: A Meta-Analysis of Echocardiographic Studies

INTRODUCTION

Evidence on myocardial deformation, detected by speckle tracking echocardiography (STE), in patients with acromegaly is scanty.

AIM

The aim of the present meta-analysis was to provide an updated information on left ventricular (LV) systolic function assessed by global longitudinal strain (GLS) in patients with acromegaly and preserved LVEF.

METHODS

Following the PRISMA guidelines, systematic searches were conducted across bibliographic databases (Pub-Med, OVID, EMBASE and Cochrane library) to identify eligible studies from inception up to June 30-2024. Clinical studies published in English reporting data on LV mechanics in patients with acromegaly and controls were included. The statistical difference of the echocardiographic variables of interest between groups such as LVEF and global longitudinal strain (GLS) was calculated by standardized mean difference (SMD) with 95% confidence interval (CI) by using random-effects models.

RESULTS

Seven studies including 288 patients with acromegaly and 294 healthy individuals were considered for the analysis. Pooled average LVEF values were 64.6 ± 1.5% in the healthy control group and 64.0 ± 1.3% in the acromegaly group (SMD: - 0.21 ± 0.22, CI -0.62/0.22, p = 0.34); the corresponding values of GLS were - 19.1.1 ± 1.2% and - 17.5 ± 1.2% (SMD: -0.52 ± 0.27, CI - 1.05/0.01, p = 0.05). No difference was found between the two groups for both global circumferential strain (GCS) and global radial strain (GRS).

CONCLUSIONS

Our findings suggest that patients with acromegaly in which LVEF is completely comparable to healthy controls show an impairment in GLS of borderline statistical significance. Whether GLS assessment can actually unmask early alterations of systolic function in patients with acromegaly better than LVEF will need to be investigated by future studies.

Growth hormone receptor antagonist pegvisomant and its role in the medical therapy of growth hormone excess

Pegvisomant is a growth-hormone (GH) receptor antagonist that prevents the formation of the active heterotrimer of the dimerised GH receptor and the GH molecule necessary for downstream signal transduction. Over the past 20 years, it has become a key therapeutic option for physicians treating syndromes of GH/IGF-1 excess. Sufficient longitudinal follow-up data suggest that it can be deemed both safe and effective. It is the drug with the greatest potential for achieving an amelioration of the biochemical effects of GH excess with a corresponding normalisation of IGF-1 levels; however, insufficient dose titration has lessened real-world therapeutic outcomes. Theoretical concerns about stimulating tumour growth have been resolved as this has not been observed, while derangement of liver enzymes and local skin-related adverse reactions may occur in a minority of the patients. It may be a particularly impactful medication for the treatment of children, young people, and those with inherited disorders of GH excess, where other treatment modalities often fail. Combination therapy of pegvisomant with first- and second-generation somatostatin receptor ligands or with dopamine agonists remains an ongoing area of interest and research. High cost remains a barrier to the use of pegvisomant in many settings.

Changes in acromegaly comorbidities, treatment, and outcome over three decades: a nationwide cohort study

Objective

To study the time-dependent changes in disease features of Danish patients with acromegaly, including treatment modalities, biochemical outcome, and comorbidities, with a particular focus on cancer and mortality.

Methods

Pertinent acromegaly-related variables were collected from 739 patients diagnosed since 1990. Data are presented across three decades (1990-1999, 2000-2009, and 2010-2021) based on the year of diagnosis or treatment initiation.

Results

Adenoma size and insulin-like growth factor I (IGF-I) levels at diagnosis did not differ significantly between study periods. The risk of being diagnosed with diabetes, heart disease, sleep apnea, joint disease, and osteoporosis increased from the 1990s to the later decades, while the mortality risk declined to nearly half. The risk of cancer did not significantly change. Treatment changed toward the use of more medical therapy, and fewer patients underwent repeat surgeries or pituitary irradiation. A statistically significant increase in the proportion of patients achieving IGF-I normalization within 3-5 years was observed over time (69%, 83%, and 88%). The proportion of patients with three or more deficient pituitary hormones decreased significantly over time.

Conclusion

Modern medical treatment regimens of acromegaly as well as increased awareness and improved diagnostics for its comorbidities have led to better disease control, fewer patients with severe hypopituitarism, and declining mortality in the Danish cohort of acromegaly patients. The risk of cancer did not increase over the study period.