Cardiac Risk in Patients with Treatment Naïve, First-Line Medically Controlled and First-Line Surgically Cured Acromegaly in Comparison to Matched Data from the General Population

Prevalence of clinical signs, symptoms and comorbidities at diagnosis of acromegaly: a systematic review in accordance with PRISMA guidelines

OBJECTIVE

Diagnostic delay is high in acromegaly and leads to increased morbidity and mortality. The aim of this study is to systematically assess the most prevalent clinical signs, symptoms and comorbidities of acromegaly at time of diagnosis.

DESIGN

A literature search (in PubMed, Embase and Web of Science) was performed on November 18, 2021, in collaboration with a medical information specialist.

METHODS

Prevalence data on (presenting) clinical signs, symptoms and comorbidities at time of diagnosis were extracted and synthesized as weighted mean prevalence. The risk of bias was assessed for each included study using the Joanna Briggs Institute Critical Appraisal Checklist for Studies Reporting Prevalence Data.

RESULTS

Risk of bias and heterogeneity was high in the 124 included articles. Clinical signs and symptoms with the highest weighted mean prevalence were: acral enlargement (90%), facial features (65%), oral changes (62%), headache (59%), fatigue/tiredness (53%; including daytime sleepiness: 48%), hyperhidrosis (47%), snoring (46%), skin changes (including oily skin: 37% and thicker skin: 35%), weight gain (36%) and arthralgia (34%). Concerning comorbidities, acromegaly patients more frequently had hypertension, left ventricle hypertrophy, dia/systolic dysfunction, cardiac arrhythmias, (pre)diabetes, dyslipidemia and intestinal polyps- and malignancy than age- and sex matched controls. Noteworthy, cardiovascular comorbidity was lower in more recent studies. Features that most often led to diagnosis of acromegaly were typical physical changes (acral enlargement, facial changes and prognatism), local tumor effects (headache and visual defect), diabetes, thyroid cancer and menstrual disorders.

CONCLUSION

Acromegaly manifests itself with typical physical changes but also leads to a wide variety of common comorbidities, emphasizing that recognition of a combination of these features is key to establishing the diagnosis.

Impact of obstructive sleep apnea on cardiovascular risk in patients with acromegaly

OBJECTIVE

Respiratory complications represented by obstructive sleep apnea (OSA), cardiovascular disease (CVD), and metabolic disorders including insulin resistance (IR) are common in patients with acromegaly. OSA is further associated with a higher risk of IR and CVD in the general population. However, significant information on the effect of OSA on IR and CVD risk for patients with acromegaly remains to be scarce.

PATIENTS AND METHODS

This retrospective study included 125 patients with active acromegaly. Medical history, anthropometric parameters, polysomnographic and fasting biochemical measurements were collected. Ten-year Framingham CVD risk scores were calculated and categorized as low, moderate, and high. IR was assessed using the homeostasis model assessment (HOMA-IR).

RESULTS

OSA was confirmed in two thirds of the enrolled patients. Compared with patients without OSA, patients with both OSA and acromegaly were found to have higher proportion of HOMA-IR and moderate-to-high 10-year CVD risk. Logistic regression analysis showed that OSA, HOMA-IR, and low-density lipoprotein cholesterol were all risk factors for moderate-to-high CVD risk. Meanwhile, no mediating effect of HOMA-IR in the association between OSA and Framingham CVD risk was observed in patients with acromegaly.

CONCLUSIONS

The coexistence of OSA might increase the CVD risk for patients with acromegaly, and IR might independently contribute to CVD risk in acromegalic patients with OSA.

Changes in metabolic parameters and cardiovascular risk factors after therapeutic control of acromegaly vary with the treatment modality. Data from the Bicêtre cohort, and review of the literature

CONTEXT

Untreated acromegaly is associated with increased morbidity and mortality due to malignant, cardiovascular, and cerebrovascular disorders. Effective treatment of acromegaly reduces excess mortality, but its impact on cardiovascular risk factors and metabolic parameters are poorly documented.

AIM

We analyzed changes in cardiovascular risk factors and metabolic parameters in patients receiving various treatment modalities.

PATIENTS AND METHODS

We retrospectively studied 96 patients with acromegaly, both at diagnosis and after IGF-I normalization following surgery alone (n = 51) or medical therapy with first generation somatostatin analogues (SSA, n = 23), or pegvisomant (n = 22). Duration of follow-up was 77 (42-161) months, 75 (42-112) months, and 62 (31-93) months, in patients treated with surgery alone, SSA, and pegvisomant, respectively. In all the cases except four, patients treated medically had underwent previous unsuccessful surgery.

RESULTS

IGF-I normalization was associated with increased body weight, decreased systolic blood pressure (SBP) in hypertensive patients, decreased fasting plasma glucose (FPG) and HOMA-IR and HOMA-B levels, increased HDL cholesterol (HDLc); whereas, LDL cholesterol (LDLc) was not significantly different. Plasma PCSK9 levels were unchanged in patients with available values. Cardiovascular and metabolic changes varied with the treatment modality: surgery, but not pegvisomant, had a beneficial effect on SBP; FPG decreased after surgery but increased after SSA; the decline in HOMA-IR was only significant after surgery; pegvisomant significantly increased LDLc and total cholesterol; whereas SA increased HDLc and had no effect on LDLc levels.

CONCLUSION

Treatments used to normalize IGF-I levels in patients with acromegaly could have differential effects on cardiovascular risk factors and metabolic parameters.