Acromegaly diagnosis involves specific blood tests and scans. Learn about IGF-1 screening, the glucose suppression test, and MRI imaging used to confirm the condition.
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Accurate diagnosis and evaluation of acromegaly is essential for preventing irreversible tissue overgrowth and associated comorbidities. This page is designed for patients and caregivers seeking a clear understanding of how acromegaly is identified, assessed, and prepared for treatment, especially those traveling internationally for care. Early recognition can reduce the risk of cardiovascular disease, diabetes, and joint problems, which affect up to 70 % of untreated individuals.
We will walk you through the step‑by‑step process used by Liv Hospital’s endocrinology team, from the initial clinical interview to advanced imaging and multidisciplinary review. By the end of this guide, you will know what tests to expect, how results are interpreted, and how the evaluation informs a personalized treatment plan.
Whether you are newly diagnosed or have been living with the condition for years, understanding the full scope of diagnosis and evaluation empowers you to make informed decisions and collaborate effectively with your healthcare providers.
Acromegaly results from chronic excess secretion of growth hormone (GH), most often due to a pituitary adenoma. The elevated GH stimulates the liver to produce insulin‑like growth factor‑1 (IGF‑1), leading to progressive tissue growth. Recognizing the clinical picture is the first pillar of diagnosis and evaluation.
Because these changes develop slowly, patients often attribute them to normal aging. A thorough history that captures gradual changes over years is therefore crucial in the diagnosis and evaluation pathway.
The second phase of the evaluation focuses on objective measurements that confirm hormonal excess. Laboratory testing is performed after an overnight fast and, when appropriate, following an oral glucose tolerance test (OGTT) to assess GH suppression.
At Liv Hospital, all assays are calibrated to international standards, ensuring comparability with global reference ranges. Results are reviewed by an endocrinologist who integrates them with clinical findings to determine the need for imaging.
Imaging provides definitive anatomical information about the pituitary lesion and its relationship to surrounding structures. High‑resolution magnetic resonance imaging (MRI) is the gold standard, but additional modalities may be required for surgical planning.
All images are reviewed by a multidisciplinary team, including neuroradiologists and neurosurgeons, to assess tumor size, invasiveness, and suitability for surgical or medical therapy. This collaborative review is a critical component of comprehensive diagnosis and evaluation.
Several disorders can imitate acromegaly’s clinical and biochemical profile. Accurate differentiation prevents unnecessary interventions and guides appropriate management.
When laboratory values are equivocal, repeat testing and extended hormonal panels (e.g., cortisol, ACTH) are performed. The goal is to rule out these alternatives before confirming an acromegaly diagnosis.
Once the presence of a GH‑secreting adenoma is established, the disease is staged to guide treatment intensity. Several scoring systems incorporate tumor size, biochemical control, and comorbidities.
The total ASI categorizes disease as mild (1‑4), moderate (5‑8), or severe (9‑12). This stratification informs whether primary therapy should be surgical, medical, or a combination, and it shapes follow‑up frequency.
Liv Hospital convenes a dedicated endocrinology board—including endocrinologists, neurosurgeons, radiologists, and anesthesiologists—to review each patient’s ASI, discuss therapeutic options, and create a customized care pathway.
Effective treatment begins with informed patients. The evaluation phase concludes with a comprehensive briefing that covers expected procedures, potential risks, and postoperative monitoring.
International patients receive additional support from Liv Hospital’s patient‑services team, which assists with travel logistics, interpreter services, and accommodation near the clinic. This seamless transition from diagnosis to treatment exemplifies the hospital’s commitment to comprehensive care.
Liv Hospital is a JCI‑accredited, internationally recognized center that specializes in endocrine disorders such as acromegaly. Our multidisciplinary team combines expertise in endocrinology, neurosurgery, radiology, and patient navigation to deliver a seamless diagnostic journey. International patients benefit from 360‑degree support—including visa assistance, airport transfers, interpreter services, and comfortable accommodation—ensuring that the focus remains on health and recovery.
Ready to start your personalized diagnostic pathway? Contact Liv Hospital today to schedule a consultation with our acromegaly specialists and experience world‑class care from the moment you arrive.
Send us all your questions or requests, and our expert team will assist you.
Acromegaly develops slowly, so patients often notice gradual changes. The most common clinical features are increased shoe or ring size due to bone growth in the hands and feet, and facial changes like a larger nose, lips, and protruding jaw. Skin becomes thicker and may sweat excessively. Joint pain and limited mobility arise from cartilage overgrowth. Respiratory issues such as sleep apnea and a deepening voice are frequent. Hormonal excess also leads to metabolic problems, notably glucose intolerance or overt diabetes. Recognizing this constellation of signs is the first step in the diagnostic pathway.
The laboratory work‑up begins with a fasting serum IGF‑1 measurement, which serves as a screening marker; values above the age‑adjusted upper limit suggest GH excess. A random GH level can provide a baseline, but GH secretion is pulsatile, so a definitive test is the 75 g oral glucose tolerance test (OGTT). In healthy individuals, GH falls below 0.4 ng/mL after glucose ingestion; lack of suppression confirms acromegaly. Additional tests include prolactin to detect co‑secreting adenomas and thyroid function tests to assess pituitary reserve. All assays at Liv Hospital are calibrated to international standards for reliable interpretation.
After biochemical confirmation, imaging determines the tumor’s size and invasiveness. A pituitary MRI with gadolinium contrast detects micro‑adenomas (<10 mm) and macro‑adenomas, evaluates cavernous sinus invasion, and assesses sellar floor erosion. If MRI is contraindicated (e.g., pacemaker), a CT scan evaluates bony structures. Digital Subtraction Angiography (DSA) is reserved for rare vascular involvement or pre‑operative embolization. Whole‑body MRI or PET‑CT may be ordered when pituitary imaging is negative to search for ectopic GH‑secreting tumors. All images are reviewed by a multidisciplinary team to guide treatment planning.
Several disorders present with features similar to acromegaly. Familial tall stature shows normal GH/IGF‑1 levels and no pituitary lesion on imaging. Hyperthyroidism causes soft‑tissue swelling but abnormal thyroid tests. Carcinoid syndrome can raise IGF‑1; serotonin markers help differentiate. Paget disease enlarges bone without hormonal excess. Long‑term use of GH analogues also mimics growth. When laboratory results are borderline, repeat IGF‑1 and GH testing, along with extended panels (cortisol, ACTH), are performed. Imaging confirms the presence or absence of a pituitary adenoma, ensuring accurate diagnosis before treatment.
The Acromegaly Severity Index combines four parameters. IGF‑1 elevation is scored 1‑3 points based on how many times it exceeds the upper limit of normal. Tumor size contributes 1 point for <10 mm, 2 points for 10‑30 mm, and 3 points for >30 mm. Invasiveness, particularly cavernous sinus involvement, adds 0 or 2 points. Finally, comorbidities such as cardiovascular disease, diabetes, or respiratory problems add 0‑4 points. The summed score (1‑12) stratifies patients: mild (1‑4), moderate (5‑8), severe (9‑12). This guides whether surgery, medical therapy, or combined approaches are optimal and dictates follow‑up intensity.
Liv Hospital convenes a dedicated endocrinology board for every acromegaly patient. The core team includes an endocrinologist who interprets labs, a neurosurgeon who assesses surgical feasibility, and a neuroradiologist who reviews MRI/CT images. An anesthesiologist evaluates peri‑operative risk, especially for cardiac or respiratory comorbidities. Patient‑services coordinators assist international travelers with visas, accommodation, and interpreter services. This integrated approach ensures that diagnostic findings translate into a personalized, safe, and efficient treatment plan.
The pre‑treatment checklist begins with confirming biochemical targets: IGF‑1 should be within the age‑adjusted normal range. Baseline cardiac evaluation (e.g., echocardiogram) and respiratory assessment (sleep study if apnea is present) identify peri‑operative risks. The surgical team discusses the preferred approach—transsphenoidal versus endoscopic—and anesthesia considerations. Adjunctive medical therapies such as somatostatin analogues or GH receptor antagonists are reviewed. Post‑operative imaging is scheduled at 3‑6 months to assess residual tumor. Finally, a follow‑up plan is set: quarterly labs for the first year, then semi‑annual thereafter. International patients receive additional logistical support from the hospital’s patient‑services team.
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