Acromegaly can cause visual disturbances.

Acromegaly: Overview

It is a condition in which the pituitary gland produces excessive GH, prompting the liver to release IGF-1, which stimulates the growth of bones and tissues. Acromegaly, a rare adult hormonal illness caused by excess growth hormone (GH), usually from a benign pituitary tumour, causes larger hands, feet, and facial features and significant problems if untreated. It develops slowly and often goes unnoticed, but surgery, medication, or radiation can treat it. Usually caused by a pituitary adenoma. Occasionally, lung or pancreatic cancers cause it.

Symptoms

Larger hands, feet, jaw, brow, nose, and lips.
Spaces between teeth, expanded tongue, thick skin.
Oily complexion, deep voice, and perspiration.

Other health impacts:

Poor vision, headaches, and joint pain.
Carpal tunnel, tiredness, and sleep apnea.
Shoes or rings may become larger.

Possible complications if untreated

High blood pressure, high cholesterol, and type 2 diabetes are possible complications if untreated.
Risks: Heart disease, cardiomyopathy.
Colon polyps, sleep apnea, and arthritis are other hazards.
While untreated acromegaly can reduce longevity by ~10 years, effective treatment can restore life expectancy to near-normal levels.

Related Conditions to Acromegaly

After-puberty GH excess. Larger hands, feet, and face
GH overgrowth before puberty. Extreme height rise
Cortisol excess. Fat redistribution, weight gain
Marfan syndrome: Genetic connective tissue condition. Slim, tall, heart/eye concerns
Paget's sickness. Bone remodelling abnormalities: Weak, uneven bones
A mutation causes achondroplasia. Small, dwarfish.

Early Warning Signs

Appearance changes: Nose, lips, jaw, and brow expansion.
Hand and foot growth: Rings no longer fit, shoes tighten, or shoe size increases.
Skin changes: Oily, thick, sweaty.
Voice deepens due to expanded vocal cords and sinuses.
As the jaw grows, the teeth space out.
Pituitary tumour pressure causes headaches and vision difficulties.
Sleep apnea: Loud snoring or breathing pauses.
Joint pain: Bone and tissue overgrowth cause stiffness.

Why Early Detection Matters

Stops bone deterioration.
Helps prevent diabetes, heart disease, and colon polyps.

Acromegaly diagnosis

Diagnosis steps

Clinical assessment:
Doctors look for larger hands, feet, jaw, or facial features, as well as migraines, joint pain, and sleep apnea.

Blood tests:

IGF-1 test: Measures average growth hormone activity. Key marker: elevated IGF-1.
Normal glucose intake lowers GH levels. In acromegaly, GH stays elevated.

Imagistic studies:

MRI of the pituitary gland detects adenomas.
CT scan: Used when an MRI is impossible.

Extra tests:

Vision tests (optic nerve compression).
Colonoscopy (acromegaly increases colon polyp risk).
Heart evaluation (for hypertrophy or malfunction).

Why We Can Delay Diagnosis

Symptoms appear progressively over time.
Changes may resemble age or weight increases.
Patients often identify early when their shoe or ring sizes increase.

Major Acromegaly Complications

Cardiovascular disease:

High blood pressure
Cardiomyopathy (enlarged and dysfunctional heart)
Arrhythmias, heart failure
Heart disease increases the risk of early death

Metabolic issues:

Insulin resistance-related type 2 diabetes
Cholesterol abnormalities
Metabolically steatotic liver disease

Respiratory issues:

OSA from airway narrowing
Chronic snoring and daytime fatigue

Musculoskeletal issues:

Joint pain and degeneration
Skeletal fractures, osteoporosis
Spine deformities

Oncology risks:

Colon polyps and colorectal cancer risk increase
Possible link to breast and thyroid malignancies

Neurological and eyesight issues:

Tumour pressure headaches
Compression of the optic nerve causes vision loss.

Reproductive and hormonal effects:

Women's menstrual irregularity
Erectile dysfunction and low testosterone in males

At what age does acromegaly begin?

Acromegaly usually starts between 30 and 50, although symptoms grow slowly, delaying diagnosis. Some cases can emerge after 65, but such an occurrence is rare.

Onset Age

Most people are diagnosed in their 30s or 40s when pituitary adenomas produce excess growth hormone.
Delays in diagnosis: Many patients are diagnosed years after symptoms begin due to progressive changes such as larger hands, feet, or facial features.
Elderly cases: Rarely, acromegaly can be identified in persons over 65 with fewer tumors and milder symptoms.
Gigantism vs. acromegaly: Excess GH before puberty causes gigantism. Acromegaly develops after puberty when growth plates close.

Overall Age Distribution

Age Group Onset Probability Notes
In childhood (<18), gigantism is rare. GH excess before puberty produces height.
Young Adults (20–30). Occasional. Early pituitary adenomas may occur.
Adults (30–50) Typical peak incidence: progressive facial and skeletal changes.
Seniors (65+). Rare but conceivable. Usually milder, smaller tumors

Why Age Matters

Diabetes, heart disease, and colon polyps are more likely with earlier onset and prolonged GH exposure.
Delaying diagnosis, later-onset symptoms may be misinterpreted as ageing.
Early acromegaly detection improves treatment outcomes regardless of age.

Life Expectancy Summary

Untreated acromegaly:
Mortality is 2–3 times higher than in the overall population.
Average life expectancy decreased by ~10 years.
The top killers include heart disease, stroke, diabetic complications, and sleep apnea.

The FDA approved a new treatment for Acromegaly.

Treated acromegaly:

Successful surgery, medicine, or radiation normalizes GH and IGF-1.
Life expectancy matches the general population.
Reduced cardiovascular and metabolic disease risk boosts quality of life.

Prognostic factors:

Age at diagnosis (earlier detection = better outcomes).
Size and potential for tumor removal.
Post-treatment GH/IGF-1 control.
Problems (diabetes, hypertension, sleep apnea).

Cure for acromegaly?

Acromegaly can be controlled and cured, depending on the pituitary tumour's size and location and early therapy.

Curative Potential

Surgery:

Small pituitary adenomas respond best to treatment.
Through the nose, transsphenoidal surgery can remove the tumour completely.
Tumour cure rates range from 80-95% for small tumours to 35-67% for larger ones.

Medication:

This guideline applies to non-surgical or incomplete cures.
Somatostatin analogues, dopamine agonists, and GH receptor blockers regulate hormones.
These treatments regulate hormones but seldom cure the condition.

Radiotherapy:

Used when surgery and medicines fail.
Normalises GH/IGF-1 slowly (years).
May provide long-term control but not a cure.

Control vs. Cure

Cure: GH and IGF-1 levels normalize and the tumour is eliminated.
Control: Treatments can lower hormone levels, decrease tumours, and avoid problems, extending life.

How do acromegaly patients look?

Due to excessive growth hormone exposure, acromegaly causes physical alterations. Initially, these changes may not be noticeable, but they become typical over time.

Normal Appearance

Face changes: Prognathism, enlarged brow ridge, expanded nose, and lips.
Hands and feet are larger, and rings and shoes no longer fit.
Skin and soft tissue: Oily, thick, coarse skin, heavy sweating.
Deeper voice due to larger vocal cords and sinuses.
As the jaw grows, the teeth space out.
Stocky, muscular frame with expanded chest and joints.

Genetics of acromegaly?

In rare situations, inherited gene mutations or disorders like MEN1, Carney complex, or familial isolated pituitary adenomas can cause acromegaly. Most occurrences are caused by benign pituitary tumours.

Genetic vs. Sporadic Acromegaly

An occasional case:

Random (somatic) pituitary cell mutations cause 90–95% of acromegaly.
In ~40% of pituitary tumours, the GNAS gene mutation is the most prevalent.
Only tumour tissue has these non-inherited alterations.

Family cases:

Not common, affecting ~5-10% of cases.
Family-inherited germline mutations.

Some examples are

Mutations in AIP genes cause Familial Isolated Pituitary Adenoma (FIPA).
Duplications of GPR101 can cause X-linked acrogigantism (XLAG).
MEN1 and MEN4 syndromes: Multiple endocrine neoplasia with pituitary tumours.
PRKAR1A mutations cause the Carney complex.
GNAS mosaic mutations cause McCune-Albright syndrome.

Acromegaly vs. gigantism

Up to 50% of childhood-onset gigantism is genetic.
Sporadic adult-onset acromegaly.

Overview of Genetic Contribution

Type: Genes/syndrome inheritance prevalence
Sporadic acromegaly: GNAS mutation: ~40% of tumours. Not inherited

In 20% of families with familial isolated pituitary adenoma (FIPA), the AIP mutation is present. Autosomal dominant X-linked acrogigantism (XLAG) and GPR101 duplication are rare (<5%) X-linked MEN1/MEN4 disorders. MEN1, CDKN1B: 1–2% Autosomal dominant.

Cases of Carney complex with PRKAR1A mutation are autosomal dominant (65%).
McCune-Albright syndrome: GNAS mosaic mutation, rare. Uninherited (mosaic)

Conclusion

Acromegaly, a rare but deadly hormonal condition caused by excess growth hormone from a pituitary tumour, develops slowly, remaining unnoticed until physical abnormalities like larger hands, feet, and facial features appear.

Treatment and cure are possible with early detection of acromegaly. Knowing small changes like shoe size rises or facial changes can mean the difference between lifetime difficulties and a healthy, normal existence.