This table lists symptoms that people with this disease may have. For most diseases, symptoms will vary from person to person. People with the same disease may not have all the symptoms listed. This information comes from a database called the Human Phenotype Ontology (HPO) . The HPO collects information on symptoms that have been described in medical resources. The HPO is updated regularly. Use the HPO ID to access more in-depth information about a symptom.
|Medical Terms||Other Names||
|80%-99% of people have these symptoms|
|Accelerated skeletal maturation||
Advanced bone age
Early bone maturation[ more ]
Early onset of puberty
Early puberty[ more ]
Increased body height
|30%-79% of people have these symptoms|
|Abnormality of the hair||
|5%-29% of people have these symptoms|
|Attention deficit hyperactivity disorder||
Attention deficit disorder
Attention deficit-hyperactivity disorder
Childhood attention deficit/hyperactivity disorder[ more ]
Low sperm count
|Percent of people who have these symptoms is not available through HPO|
|Decreased testicular size||
Small testis[ more ]
|Precocious puberty in males||
Early onset of puberty in males
If you need medical advice, you can look for doctors or other healthcare professionals who have experience with this disease. You may find these specialists through advocacy organizations, clinical trials, or articles published in medical journals. You may also want to contact a university or tertiary medical center in your area, because these centers tend to see more complex cases and have the latest technology and treatments.
If you can’t find a specialist in your local area, try contacting national or international specialists. They may be able to refer you to someone they know through conferences or research efforts. Some specialists may be willing to consult with you or your local doctors over the phone or by email if you can't travel to them for care.
You can find more tips in our guide, How to Find a Disease Specialist. We also encourage you to explore the rest of this page to find resources that can help you find specialists.
Related diseases are conditions that have similar signs and symptoms. A health care provider may consider these conditions in the table below when making a diagnosis. Please note that the table may not include all the possible conditions related to this disease.
Conditions with similar signs and symptoms from Orphanet
Differential diagnoses include other causes of precocious puberty associated with low levels of gonadotropins such as adrenal tumors, testicular Leydig cell tumors (ruled out by testicular ultrasound since they can be of small size), human chorionic gonadotropin (HCG)-secreting tumors, congenital adrenal hyperplasia (CAH) due to 21-hydroxylase deficiency, CAH due to 11-beta-hydroxylase deficiency, central precocious puberty (with detectable LH levels that can be stimulated by gonadotropin-releasing hormone (GnRH) or GnRH agonists) (see these terms), and occult exposure to androgens.
Visit the Orphanet disease page for more information.
Research helps us better understand diseases and can lead to advances in diagnosis and treatment. This section provides resources to help you learn about medical research and ways to get involved.
These resources provide more information about this condition or associated symptoms. The in-depth resources contain medical and scientific language that may be hard to understand. You may want to review these resources with a medical professional.
Questions sent to GARD may be posted here if the information could be helpful to others. We remove all identifying information when posting a question to protect your privacy. If you do not want your question posted, please let us know. Submit a new question
My uncle, my brother, and one of my brother's sons have testotoxicosis. My son is also affected. I took my son to an endocrinologist and he treated my son with ketoconazole. Treatment was stopped when my son was 11 years old. He continued to grow until the age of 13. Now he is 14 and is 5'7". We are in the process of going back to the doctor that treated my son to get an x-ray of his hand to see if the growth plates have grown together. Has ketoconazole been proven to work successfully in boys with testotoxicosis? See answer