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Autosomal recessive (AR) conditions occur when a person inherits two non-working copies of a disease-causing (pathogenic) gene variant from their parents.

ACTH is a hormone produced by the small adrenal glands located on the top of the kidneys. Reduced ACTH levels cause a condition called adrenal insufficiency. In individuals with POMC deficiency, adrenal insufficiency often results in extended periods of extremely low blood sugar (hypoglycemia).

A skin condition characterized by patches of darkened (light brown to black), thickened, velvety skin in the body’s folds and creases. These patches may be found in the neck, armpits, groin, or other places on the body.

Growth hormone deficiency is a condition where the body does not have enough of the hormone that helps us grow. Many factors, including genetics, can cause this condition. When it begins in adolescence, it is known as adolescent-onset growth hormone deficiency.

A variant or change in a gene that is not going to cause health problems. This is considered a “negative” result.

A condition where the heart is abnormally enlarged, which compromises its ability to pump blood to the rest of the body.

In an autosomal recessive inheritance pattern, if an individual inherits one normal copy of a gene and one copy of a disease-causing variant, they are called a carrier and will generally not have any symptoms of the disease that variant causes.

A condition that causes light-sensing cells in the retina (the back part of the eye) to not work properly, leading to progressive vision loss.

The endocrine system is made of organs, glands, and hormones that tell the body how to do its job. This system influences how your heart beats, how you use the food you eat, how you grow, and many other important body functions. An endocrine abnormality means that one or more parts of the system is not working the way it should.

How the body balances the calories we consume and the calories we expend. An imbalance in this system can lead to weight changes.

Our body’s instruction manual that informs how our bodies grow, develop, and function. It is through our genes that traits are passed down from parent to offspring.

A healthcare provider with in-depth training in genetic science and counseling who helps people understand complicated genetic topics and adapt to the medical, emotional, and familial implications of genetic diseases.

Changes (also known as variants) in the standard “spelling” of a gene. Gene variants can result in serious health problems or be “silent” with no negative health effects.

An individual with one normal copy of a gene and one copy with a genetic variant.

An individual with two copies of a gene with a genetic variant.

Chemical messengers made in the endocrine glands that control body functions.

Insatiable hunger, which is a deep hunger that doesn’t go away — it can feel like your hunger is stuck in the “on” position, even after eating. Common experiences include intense hunger that doesn’t go away, taking a longer time to feel full while eating, feeling hungry again right after a meal, thinking about food constantly, constantly looking for food (night eating, stealing food, eating discarded food), and becoming very upset when food is unavailable.

A rare disorder of delayed puberty that happens when levels of gonadotropin hormones (Gn) are too low, which leads to low levels of other key hormones like follicle-stimulating hormone (FSH) and luteinizing hormone (LH).

A small part of the brain that has an important role in controlling many bodily functions, including the release of hormones from the pituitary gland. This is where the MC4R pathway is located.

A condition caused when the thyroid doesn’t make enough of certain hormones. Symptoms of hypothyroidism include fatigue, constipation, poor temperature regulation, and thinning hair.

An important receptor that helps the body regulate weight. The hormone leptin docks or attaches to the leptin receptor, much like a docking station.

A variant in a gene that is probably not going to cause health problems. This is considered a probably “negative” result.

A variant in a gene that is expected or likely to cause health issues.

When a “carrier” who has only one copy of a gene with a variant has the signs and symptoms of a genetic condition that ordinarily requires two copies with variants.

The MC4R pathway is one of the pathways that regulates weight and appetite in the brain. Click here to learn more about the MC4R pathway.

A specialist doctor with additional in-depth training in genetics and medicine.

The rate at which the body uses energy.

Uncontrolled movements of the eye.

A variant in a gene that is expected to cause health issues.

Increased sensitivity to light.

The presence of extra toes and/or fingers.

The feeling of fullness after a meal.

Chemicals and proteins that the body and brain use to communicate and direct processes in the body.

A condition in which the eyes don't look in exactly the same direction at the same time. This is also known as “crossed eyes” or eye misalignment.

A genetic difference in which two copies of a gene or chromosome come from the same parent, instead of one copy coming from each parent.

A change in the standard "spelling" of a gene. Genetic variants may result in serious health problems or be “silent” with no negative health effects.

A variant in a gene that may or may not cause health issues, but there is not enough information available to know for sure. This variant may be recategorized as “benign” or “disease-causing” as more information becomes available.

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