Zoophobia is an intense and persistent fear of animals. It is a type of specific phobia, which is an anxiety disorder marked by excessive fear triggered by a particular object or situation. The fear may involve all animals or be limited to certain types, such as dogs, snakes, insects or birds. People with zoophobia may feel overwhelming anxiety even when …

X-linked agammaglobulinemia is a rare inherited disorder of the immune system that affects the body’s ability to fight infections. It primarily occurs in males and is usually diagnosed in infancy or early childhood. The condition prevents the normal development of B lymphocytes, which are white blood cells responsible for producing antibodies. Because antibodies play a key role in defending against …

Triple X syndrome is a genetic condition that affects females and occurs when a person has an extra X chromosome in their cells. Instead of the typical two X chromosomes found in females, individuals with this condition have three X chromosomes. This chromosomal variation usually occurs randomly during the formation of reproductive cells or early development. Many females with triple …

Plague is a serious infectious disease caused by the bacterium Yersinia pestis. It primarily affects animals such as rodents but can spread to humans through the bites of infected fleas or through direct contact with infected animals. Although plague is rare today, it still occurs in some parts of the world. Historically, plague caused major pandemics, including the Black Death …

The yips are a movement disorder that causes a sudden loss of fine motor control during specific, well-learned activities. The condition is most commonly seen in athletes, especially golfers, baseball pitchers, cricket bowlers, and darts players. It typically affects precise movements such as putting, throwing, or releasing an object. The yips may appear unexpectedly after years of normal performance. In …

Zollinger-Ellison syndrome is a rare condition in which one or more tumors form in the pancreas or the upper part of the small intestine, called the duodenum. These tumors, known as gastrinomas, produce large amounts of the hormone gastrin. Excess gastrin causes the stomach to make too much acid, leading to peptic ulcers, diarrhea and abdominal pain. Zollinger-Ellison syndrome can …

Hypothyroidism, also known as an underactive thyroid, is a condition in which the thyroid gland does not produce enough thyroid hormones to meet the body’s needs. These hormones play a vital role in regulating metabolism, energy levels, heart function, and body temperature. When hormone levels are low, many body processes slow down, leading to a wide range of symptoms. Symptoms …

Hypospadias is a congenital condition in which the opening of the urethra is not located at the tip of the penis. Instead, the opening may be found on the underside of the penis, near the scrotum, or at the junction where the penis meets the scrotum. The urethra is the tube that carries urine from the bladder out of the …

Hypoplastic Left Heart Syndrome is a rare and serious congenital heart defect present at birth. In this condition, the left side of the heart is underdeveloped and cannot effectively pump oxygen-rich blood to the body. Parts of the left heart, including the left ventricle, mitral valve, aortic valve and aorta, may be very small or absent. Because the left side …

Hypopituitarism is a rare condition in which the pituitary gland does not produce one or more of its hormones, or does not produce enough of them. The pituitary gland, located at the base of the brain, plays a key role in regulating many body functions by controlling other glands such as the thyroid, adrenal glands and reproductive organs. When pituitary …