ILLNESSOPEDIA

Free Online Database Of Diseases, Illnesses & Ailments

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Here you can look through thousands of and diseases, ailments, medical conditions and illnesses. You can find the symptoms. Read about any ailment's diagnosis and find medications that can be used and the correct treatments that are needed.

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Diseases, Illnesses & Ailments Starting from Letter A


  1. Antibiotic-caused Colitis
    Antibiotic-caused colitis is an infectious disease affecting the colon. Like the typical colitis, it is caused by C. difficile, which is also present among individuals who are taking antibiotic treatment. This infection commonly occurs in hospitals. [read more]

  2. Antimicrobial Resistance
    Antimicrobial resistance refers to the ability of bacteria to resist the effects of certain drugs. In this case some bacterial infections become difficult to treat since doctors have to search for a new antidote to treat diseases. Antimicrobial resistance can lead to more serious diseases such as bacteremia, where the bacteria have contaminated the blood. [read more]

  3. Antiphospholipid syndrome
    Antiphospholipid syndrome, simply called “APLS” or “APS”, is a disorder of coagulation, which causes pregnancy-related complications such as preeclampsia, miscarriage and preterm deliver. It also causes blood clots in both veins and arteries. The syndrome occurs because of the production of antibodies against phosphilipids. This disorder is characterized by antibodies against B2 glycoprotein I and cardiolipin. Antiphospholipid syndrome is usually seen in conjunction with other autoimmune-related diseases. In some cases, Antiphospholipid syndrome can lead to high risk of death and dramatic organ failure caused by generalized thrombosis. [read more]

  4. Antisocial personality disorder
    Antisocial personality disorder (APD) is a mental disorder characterized by a persistent pattern and violation of and disregard for the rights of others, which begin in early childhood or adolescence and continue into adulthood. Features of Antisocial personality disorder include manipulation and deceit. [read more]

  5. Antithrombin deficiency, congenital
    Antithrombin is a small protein molecule, which is responsible for inactivating several enzymes of the coagulation system. It consists of 432 amino acids and contains 3 disulfide bonds as well as 4 possible “glycosylation” sites. The role of antithrombin in regulating normal blood coagulation is demonstrated by the relationship between acquired and inherited antithrombin deficiencies. This relationship is also seen in the increased risk of developing thrombotic disease. Antithrombin deficiency usually appears to patient with recurrent pulmonary embolism and venous thrombosis. [read more]

  6. Antitrypsin
    Alpha 1-antitrypsin deficiency is a genetic defect caused by an abnormal production of alpha-1 antitrypsin, a protein that thrives in the liver cells. The lack of this protein may cause severe disorders in the different organs and weakness of the immune system. [read more]

  7. Anton syndrome
    Anton syndrome, also known as “Anton's blindness” and “Anton-Babinski syndrome”, is a very rare symptom of brain damage that occurs in the occipital lobe. Anton-Babinski syndrome is named after Gabriel Anton and Joseph Babinski. Individuals who suffer from Anton syndrome are considered “cortically blind”, but insist they are capable of seeing even with evidence of their blindness. Blindness is usually dismissed by the suffered of Anton syndrome through confabulation. This type of symptom is commonly seen after a stroke, but could also occur after experiencing head injury. Anton syndrome can be caused by damage in the portion of the brain responsible for detecting the absence or presence of vision or damages to the part of the brain responsible for eyesight. [read more]

  8. Anuria
    Anuria otherswise known as the Anuresis is a medical condition where there is inability to urinate because of the kidney failed to function or due to diseases like kidney stones. [read more]

  9. Aortic aneurysm
    Aortic aneurysm is a general term referring to the swelling of the aorta, usually caused by an underlying weakness in the aorta's wall. Although stretched vessels may only cause discomfort, aortic aneurysm may result in rupture, which causes massive internal hemorrhage, severe pain and a quick death if not treated promptly. [read more]

  10. Aortic arch interruption
    Aortic arch interruption, also commonly known as “interrupted aortic arch”, is an extremely rare heart defect wherein the aorta did not complete its development – did not form a complete tube or the aorta has a hole in the muscle wall. As such, patients with an aortic arch interruption have a gap between the descending and ascending thoracic aorta. Majority of patients with this condition have other cardiac-related anomalies, such as bicuspid aortic valve, truncus arteriosus, aortic stenosis or ventricular septal defects. As such, treatment of aortic arch interruption would depend on the presence of any of the associated defects. [read more]

  11. Aortic coarctation
    Aortic coarctation is a condition characterized by narrowing of the aorta in an area where the “ductus arteriosus” inserts. There are three types of aortic coarctation – preductal, ductal and postductal coarctation. In preductal coarctation, the narrowing is near the ductus arteriosus. Severe cases of preductal coarctation, blood flow to the lower body to the narrowing could become dependent on a patent ductus arteriosus. When this happens, its closure can become life threatening and lead to hypoplastic development of the aorta. In ductal coarctation, the narrowing occurs along the insertion of the “ductus arteriosus”. This type of condition usually develops when the ductus arteriosus closes. In postductal coarctation, the narrowing is far from the instertion of the ductus arteriosus. Newborns with this type of aortic coarctation may become critically sick after birth. Ductal aortic coarctation is more common in adults and is associated with hypertension, weak pulses in lower extremeties and notching of the ribs. [read more]

  12. Aortic dissection
    Aortic dissection is a condition wherein the wall of the aorta tears, causing blood to flow between the layers of the aorta wall and forcing the layers apart. Aortic dissection is a life threatening condition and is considered as a medical emergency because it could lead to a quick death even with appropriate treatments. If the dissection tears the aorta through all its three layers, rapid and massive blood loss would occur. Aortic dissection that result in rupture have 80% mortality rate. Almost 50% of patients with aortic dissention die before they reach the hospital. [read more]

  13. Aortic supravalvular stenosis
    Supravalvular aortic stenosis (SVAS) is a fixed form of congenital left ventricular outflow tract (LVOT) obstruction that arises as a localized or a diffuse narrowing of the ascending aorta beyond the superior margin of the sinuses of Valsalva. It is responsible for less than 7% of all fixed forms of congenital LVOT obstructive lesions. SVAS may arise sporadically, as a manifestation of elastin arteriopathy, or as part of Williams syndrome (also known as Williams-Beuren syndrome), a genetic disorder with autosomal dominant inheritance. [read more]

  14. Aortic Valve Regurgitation
    Aortic valve regurgitation is also known as aortic incompetence or insufficiency. This medical condition occurs when the heart's aortic valve does not close tightly, causing some of the blood to that has been pumped out to leak back. This leakage will result to preventing the heart to supply blood to the rest of the body, causing the patient to always feel tired and short of breath. [read more]

  15. Aortic valve stenosis
    Aortic valve stenosis (AS) is a “valvular” heart disease caused by the incomplete opening of the aortic valve. Normally, the aortic valves control the direction of blood flow from the left ventricle to the aorta. When the aortic valve is in good working condition, it does not obstruct the flow of blood. Aortic valve stenosis is a common disorder, affecting about 2% of individuals over 65 years old, 3% of patients over 75 and 4% of people over 85 years old. Since the global population is aging, the prevalence of Aortic valve stenosis is increasing. [read more]

  16. Apert syndrome
    Apert syndrome is a congenital disorder commonly known as “acrocephalosyndactyly”. This disorder is classified as a “branchial arch syndrome”, which affects the first branchial arch, responsible for the maxilla and mandible. Apert syndrome causes lasting and widespread effects to individuals because branchial arches are important in the fetus development. [read more]

  17. Aphasia
    Aphasia is a language disorder resulting from damage to segments of the brain that are responsible for language; usually on the left brain hemisphere. It often occurs all of a sudden usually as a result of stroke or head injury. In some cases, it progresses gradually. In both cases, the result is remarkable impairment in writing, reading, expression and language understanding [read more]

  18. Aphthous stomatitis
    Aphthous stomatitis is a form of mouth ulcer that presents a painful open sore within the mouth, which is caused by a break in the patient's mucous membrane. Also known as aphthous ulcer or “Sutton's disease”, the term “aphtha” means ulcer. Aphthous stomatitis is characterized by repeated painful discrete areas of ulceration. Recurrent Aphthous stomatitis (RAD) is distinguished from other diseases by their multiplicity, chronicity and tendency to recur. RAD is one of the most common oral diseases, accounting to 10% of the population. Females are more affected by Aphthous stomatitis than men are. However, over 35% of patients with RAD have a family history of this disease. [read more]

  19. Aphthous Ulcers
    Aphthous ulcers are more commonly known as canker sores. These are characterized by the development of small and shallow lesions on the soft tissues in your mouth, under the tongue, or insides of the cheeks or lips, as well as at the base of the gums. Often , it will usually go away naturally after a few weeks or so. [read more]

  20. Apiphobia
    Apiphobia is the fear of bees or bee stings, a common phobia among people. Derived from the Latin words “apis” for honeybee, Apiphobia is a specific phobia – an abnormal fee of bees. Apiphobia is a type of zoophobia common in young children, which could prevent them from participating in any activities outdoors. Older people with Apiphobia can control this fear more easily. However, a few cases of Apiphobia in adults, such as Adam Savage of MythBusters, may show extreme fear of bees. One method of overcoming Apiphobia in children is to train them in facing their fears. [read more]



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