ⓘ Diseases and disorders ..


A disease is a particular abnormal condition that negatively affects the structure or function of all or part of an organism, and that is not due to any immediate external injury. Diseases are often known to be medical conditions that are associated with specific symptoms and signs. A disease may be caused by external factors such as pathogens or by internal dysfunctions. For example, internal dysfunctions of the immune system can produce a variety of different diseases, including various forms of immunodeficiency, hypersensitivity, allergies and autoimmune disorders. In humans, disease is ...

Achard syndrome

Achard syndrome is a syndrome consisting of arachnodactyly, receding lower jaw, and joint laxity limited to the hands and feet. Hypermobility and subluxations of the joints, increased lateral excursion of the patellas and other findings reflect the increased ligament laxity. It is clinically similar to Marfan syndrome.

Agenesis of the vena cava

Agenesis of the vena cava is a genetic defect of the inferior vena cava. It comes about when, during development of the foetus, the right subcardinal vein does not connect as it should to the hepatic sinusoids.: 628. Agenesis of the superior vena cava may also occur; it is very rare.

Airborne disease

An airborne disease is any disease that is caused by pathogens that can be transmitted through the air by both small, dry particles, and as larger liquid droplets. Such diseases include many of considerable importance both in human and veterinary medicine. The relevant pathogens may be viruses, bacteria, or fungi, and they may be spread through breathing, talking, coughing, sneezing, raising of dust, spraying of liquids, toilet flushing or any activities which generates aerosol particles or droplets. Human airborne diseases do not include conditions caused by air pollution such as Volatile ...

Biphasic disease

A biphasic disease is a disease which has two distinct phases or components. In clinically biphasic diseases, the phases are generally chronologically separated. In histopathologically biphasic tumors, there is neoplastic tissue which contains two different cellular elements.

Bladder outlet decline

Decline in bladder outlet is the process of gradual atrophy in the distal structures to the bladder in the urinary system. It happens alongside with atrophy of the reproductive system in females. It is one of the contributing factors for disorders like stress incontinence. It is commonly associated with decline in urethral resistance pressure.



Rectitis is the inflammation inside the rectum. It mainly affects the mucous membrane of the rectum. The condition can be acute or chronic condition. Rectitis can be caused due to conditions such as ulcerative colitis or Crohns disease.