
It’s important to know the difference between acromegaly and gigantism for the right treatment. Both are caused by too much growth hormone, usually from a pituitary adenoma.
The main difference is when the hormone is produced. Gigantism happens in kids before their bones stop growing. This makes them very tall. On the other hand, acromegaly occurs in adults after their bones have stopped growing. It makes their hands, feet, face, and organs bigger.
Key Takeaways
- Acromegaly and gigantism are growth disorders caused by excess growth hormone.
- The timing of excess hormone production determines whether gigantism or acromegaly develops.
- Gigantism occurs in children before bone growth plates close.
- Acromegaly develops in adults after growth plates have fused.
- Understanding these differences is key for the right diagnosis and treatment.
Understanding Growth Hormone Disorders

Growth hormone disorders like gigantism and acromegaly share a common cause. They are triggered by too much insulin-like growth factor 1. This happens because of excess growth hormone, often from benign pituitary tumors.
The Common Root: Excess Growth Hormone and Pituitary Adenomas
The Medical organization says most acromegaly cases come from a noncancerous pituitary gland tumor, called an adenoma. This adenoma produces too much growth hormone, causing many symptoms. Gigantism also results from too much growth hormone, usually from a pituitary adenoma.
Excess growth hormone is the main cause of both conditions. This hormone increase leads to high insulin-like growth factor 1 levels. These levels cause the symptoms seen in these disorders.
Gigantism: When Growth Plates Remain Open
Gigantism happens when too much growth hormone is made before bone growth plates close in childhood. This results in too much growth, causing unusual height and other physical traits. The timing of hormone production is key in deciding between gigantism or acromegaly.
Acromegaly: After Growth Plates Close
Acromegaly, on the other hand, occurs in adults after growth plates have fused. The extra growth hormone makes body tissues and organs grow too much. This leads to symptoms like big hands and feet, facial changes, and other health issues.
It’s important to know the difference between gigantism and acromegaly for the right treatment. Understanding the causes and when hormone levels rise helps people get the right medical care.
Acromegaly vs Gigantism: Comparing Symptoms, Timing, and Diagnosis

Acromegaly and gigantism are two conditions caused by too much growth hormone. This hormone usually comes from a tumor in the pituitary gland. The main difference is when this happens and how it affects the body.
Timing of Onset
Gigantism happens when too much growth hormone is present before the bones stop growing. This usually happens in kids or teens. Acromegaly, on the other hand, occurs in adults after the bones have stopped growing.
Gigantism makes people grow too tall because the bones keep growing. Acromegaly makes bones and soft tissues bigger, leading to unique facial features and other symptoms.
Distinct Physical Manifestations
Gigantism makes people unusually tall, while acromegaly makes hands, feet, and facial features bigger. Acromegaly also causes organs to grow larger. Symptoms include coarse facial features, enlarged jawbones, and increased bone mass.
About 3 to 14 per 100,000 people have acromegaly, making it more common. Gigantism is much rarer, with only about 100 cases in the U.S.
Diagnostic Methods
To diagnose both conditions, doctors check IGF-1 and growth hormone levels. They also use MRI to find tumors in the pituitary gland. The goal is to find the cause of too much growth hormone and its effects on the body.
Knowing the differences between acromegaly and gigantism helps doctors give better care. They can target treatments based on the symptoms and when the condition started.
Conclusion
Acromegaly and gigantism are caused by too much growth hormone. This usually comes from tumors in the pituitary gland. Looking at and helps show how these conditions look.
The is linked to abnormal growth in kids. Acromegaly, on the other hand, affects adults. Knowing the difference is key for the right treatment.
Early treatment is vital, as the Medical organization says. It can stop heart and blood vessel problems, and other metabolic issues.
Understanding that the same causes is important. It helps people get medical help quickly. Looking at and can help patients understand their condition better.
FAQ
What is the main difference between acromegaly and gigantism?
Gigantism occurs in children before growth plates close, causing extreme height.
Acromegaly develops in adults and causes enlargement of hands, feet, and facial bones without increased height.
What causes gigantism and acromegaly?
Both are caused by excess growth hormone, usually from a pituitary adenoma.
The timing of hormone excess (childhood vs adulthood) determines the condition.
How do the symptoms of gigantism and acromegaly differ?
Gigantism leads to rapid height increase and delayed puberty in children.
Acromegaly causes thickened facial features, enlarged hands and feet, and joint pain in adults.
How are gigantism and acromegaly diagnosed?
Blood tests measure elevated growth hormone and IGF-1 levels.
MRI scans are used to identify pituitary tumors.
How common is gigantism?
Gigantism is extremely rare, affecting only a few individuals per million.
Most cases are linked to growth hormone–secreting tumors in childhood.
What is the medical term for gigantism?
The medical term is “pediatric growth hormone excess.”
It specifically refers to excessive GH secretion before epiphyseal plate closure.
Are gigantism and acromegaly related to other growth disorders?
Yes, both are endocrine disorders involving abnormal growth hormone regulation.
They are distinct from genetic growth disorders like familial tall stature or dwarfism.
Can gigantism and acromegaly be treated?
Yes, treatment includes surgery, medications, and sometimes radiation therapy.
Early diagnosis improves outcomes and reduces long-term complications.
References
This article aimed to conduct a study that reviews the current published data available about patients with DKA and COVID-19.https://pmc.ncbi.nlm.nih.gov/articles/PMC4085289/