Uploaded May 2025 | Updated September 2026, 2 weeks ago
10 Interesting Rare Disease Facts
1. A disease is considered rare if it affects fewer than 1 in approximately 2,000 people.
2. Drugs that are used to treat rare diseases are called "orphan drugs." These drugs are typically very costly to produce and rare.
3. The ribbon color for rare diseases is the zebra print. Medical students are usually taught the phrase, "If you hear hoofbeats, think horses, not zebras," which means they should consider common conditions first. So patients with rare diseases are the zebras rather than the horses.
4. Rare Disease Day takes place on the last day of February, either the 28th or the 29th – which is the rarest calendar day – to highlight the nature of the diseases.
5. Genetic mutations cause about 80% of what are considered "rare" diseases, which are then inherited. Approximately 10% of rare diseases arise spontaneously.
6. In the United States, approximately 30 million people have what is considered to be a rare disease. Of these, half are children.
7. The Jerusalem Syndrome is a condition in which a person who visits Jerusalem becomes excessively religious.
8. Alice in Wonderland syndrome is a disease in which a patient is confused about the size and shape of their body parts, especially the head and hands. Sufferers may also experience distorted time, touch, and sound perception.
9. Fibrodysplasia ossificans progressive (FOP), also known as Stoneman syndrome, is a disease that turns muscle and connective tissue (tendons, ligaments) into bone. Surgery to remove it just stimulates more bone growth. The disease affects one in every 2 million people.
Creative Commons: Joh-co
10. Alien hand syndrome, or Dr. Strangelove syndrome is when someone has uncontrollable hand or limb movement.
For more interesting rare disease facts, check out our article here: factretriever.com/rare-disease-facts
Don't forget to subscribe to our YouTube channel for more amazing facts:youtube.com/@UCZxmYOAglFN29DPr7mEaDLQ
10 Interesting Rare Disease Facts
1. A disease is considered rare if it affects fewer than 1 in approximately 2,000 people.
2. Drugs that are used to treat rare diseases are called "orphan drugs." These drugs are typically very costly to produce and rare.
3. The ribbon color for rare diseases is the zebra print. Medical students are usually taught the phrase, "If you hear hoofbeats, think horses, not zebras," which means they should consider common conditions first. So patients with rare diseases are the zebras rather than the horses.
4. Rare Disease Day takes place on the last day of February, either the 28th or the 29th – which is the rarest calendar day – to highlight the nature of the diseases.
5. Genetic mutations cause about 80% of what are considered "rare" diseases, which are then inherited. Approximately 10% of rare diseases arise spontaneously.
6. In the United States, approximately 30 million people have what is considered to be a rare disease. Of these, half are children.
7. The Jerusalem Syndrome is a condition in which a person who visits Jerusalem becomes excessively religious.
8. Alice in Wonderland syndrome is a disease in which a patient is confused about the size and shape of their body parts, especially the head and hands. Sufferers may also experience distorted time, touch, and sound perception.
9. Fibrodysplasia ossificans progressive (FOP), also known as Stoneman syndrome, is a disease that turns muscle and connective tissue (tendons, ligaments) into bone. Surgery to remove it just stimulates more bone growth. The disease affects one in every 2 million people.
Creative Commons: Joh-co
10. Alien hand syndrome, or Dr. Strangelove syndrome is when someone has uncontrollable hand or limb movement.
For more interesting rare disease facts, check out our article here: factretriever.com/rare-disease-facts
Don't forget to subscribe to our YouTube channel for more amazing facts:youtube.com/@UCZxmYOAglFN29DPr7mEaDLQ
