Abdominal aortic aneurysm 07/10/2012 () Aneurysm - aortic; AAA Causes, incidence, and risk factors: The exact cause is unknown, but risk factors for developing an abdominal aortic aneurysm include: Emphysema Genetic factors High blood pressure High cholesterol Male gender Obesity Smoking An abdominal aortic aneurysm can develop in anyone, but is most often seen in males over age 60 who have one or more risk factors.
Achilles tendinitis 08/11/2012 () Tendinitis of the heel Causes, incidence, and risk factors: There are two large muscles in the calf. These muscles are important for walking. They create the power needed to push off with the foot or go up on the toes.
Achondroplasia 11/13/2011 () Achondroplasia is a disorder of bone growth that causes the most common type of dwarfism. Causes, incidence, and risk factors: Achondroplasia is one of a group of disorders called chondrodystrophies or osteochondrodysplasias. Achondroplasia may be inherited as an autosomal dominant trait, which means that if a child gets the defective gene from one parent, the child will have the disorder. If one parent has achondroplasia, the infant has a 50% chance of inheriting the disorder.
Acne 11/20/2012 () Acne vulgaris; Cystic acne; Pimples; Zits Causes, incidence, and risk factors: Acne occurs when tiny holes on the surface of the skin become clogged. These holes are called pores. Each pore opens to a follicle. A follicle contains a hair and an oil gland. The oil released by the gland helps remove old skin cells and keeps your skin soft.
Acoustic neuroma 05/22/2012 () Vestibular schwannoma; Tumor - acoustic; Cerebellopontine angle tumor; Angle tumor Causes, incidence, and risk factors: Acoustic neuromas have been linked with the genetic disorder neurofibromatosis type 2 (NF2).
Acoustic trauma 08/30/2012 () Injury - inner ear; Trauma - inner ear; Ear injury Causes, incidence, and risk factors: Acoustic trauma is a common cause of sensory hearing loss . Damage to the hearing mechanisms within the inner ear may be caused by: An explosion near the ear Gunshots Long-term exposure to loud noises (such as loud music or machinery) Symptoms: Hearing loss Usually partial and involving high-pitched sounds May slowly get worse Noises, ringing in the ear ( tinnitus ) Signs and tests: The health care provider will usually suspect acoustic trauma if hearing loss occurs after noise exposure.
Acrodermatitis 05/15/2013 () Papular acrodermatitis of childhood; Gianotti-Crosti syndrome; Acrodermatitis - infantile lichenoid; Acrodermatitis - papular infantile; Papulovesicular acro-located syndrome; Acrodermatitis enteropathica Causes: The cause of acrodermatitis is poorly understood, but its link with other infections is well-documented.
Actinic keratosis 11/20/2012 () Solar keratosis; Sun-induced skin changes - keratosis; Keratosis - actinic (solar) Causes, incidence, and risk factors: Actinic keratosis is caused by exposure to sunlight. You are more likely to develop this if you: Have fair skin, blue or green eyes, or blond or red hair Had a kidney or other transplant Take medicines that suppress the immune system Spend a lot of time each day in the sun (for example, if you work outdoors) Had many, severe sunburns early in life Are older Symptoms: Actinic keratosis is usually found on the face, scalp, back of the hands, chest, or places that are often in the sun.
Acute cerebellar ataxia 02/27/2013 () Cerebellar ataxia; Ataxia - acute cerebellar; Cerebellitis; Post-varicella acute cerebellar ataxia; PVACA Causes, incidence, and risk factors: Acute cerebellar ataxia in children, especially younger than age 3, may occur several weeks after an illness caused by a virus. Viral infections that may cause this include chickenpox , Coxsackie disease, Epstein-Barr, and echovirus.
Acute cholecystitis 08/11/2011 () Cholecystitis - acute Causes, incidence, and risk factors: In 90% of cases, acute cholecystitis is caused by gallstones in the gallbladder. Other causes include severe illness and (rarely) tumors of the gallbladder. Acute cholecystitis occurs when bile becomes trapped in the gallbladder. The buildup of bile causes irritation and pressure in the gallbladder.