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Definition Duodenal atresia refers to a malformation of the duodenum, the upper portion of the small intestine, which is usually present at birth. This results in a blockage that prevents any food or fluid from leaving the stomach, also known as a complete bowel obstruction or intestinal obstruction. This is …

Definition Darier disease (DAR/ Darier disease/ Dyskeratosis Follicularis / Darier–White disease/ Keratosis follicularis) is a rare, often chronic, genetic disorder characterized primarily by non-contagious skin changes. Darier disease or Keratosis Follicularis is an autosomal disorder, meaning that a single gene inherited from one parent causes this disease. Like Hailey-Hailey disease, …

What is Dressler syndrome? Dressler syndrome is a type of pericarditis, which is the inflammation of the sac around the heart (pericardium). It’s also called post-pericardiotomy syndrome, post-myocardial infarction syndrome, or post-cardiac injury syndrome. This is because the condition typically occurs after a heart surgery, myocardial infarction (heart attack), or …

Definition Dehydration occurs when your body loses too much fluid. This can happen when you stop drinking water or lose large amounts of fluid through diarrhea, vomiting, sweating, or exercise. Not drinking enough fluids can cause muscle cramps. You may feel faint. Usually your body can reabsorb fluid from your …

Delayed sleep phase disorder – Definition Delayed sleep phase disorder (DSPD) belongs to a group of sleep disorders known as circadian rhythm sleep disorders whereby individuals experience a chronic pattern of sleep disturbance due to changes or misalignment in the circadian timing of their sleep, relative to their social and …

Definition Dumping syndrome (DS) is also referred to as rapid gastric emptying and occurs when food is passed directly from your stomach pouch to the first part of the small intestine without undergoing digestion. It is frequently related to the rapid emptying of hyperosmolar gastric content into the small bowel. …

Understanding Dystonia Dystonia is a neurological disorder that causes excessive, involuntary muscle contractions. These muscle contractions result in abnormal muscle movements and body postures, making it difficult for individuals to control their movements. The movements and postures may be painful. Dystonic movements are typically patterned and repetitive. It can affect …

Overview – Dyshidrotic Eczema Dyshidrotic eczema is an ongoing (chronic) skin condition. It is also called as pompholyx. It causes a burning, itching feeling. Severe dyshidrotic eczema may also cause a blistering rash. It can affect your palms, the sides of your fingers, and the soles of your feet. It’s …