The atypical antipsychotics (AAP; also known as second generation antipsychotics (SGAs)) are a group of antipsychotic drugs (antipsychotic drugs in general are also known as major tranquilizers and neuroleptics, although the latter is usually reserved for the typical antipsychotics) used to treat psychiatric conditions.
Atypical teratoid rhabdoid tumor (AT/RT) is a rare tumor usually diagnosed in childhood. Although usually a brain tumor, AT/RT can occur anywhere in the central nervous system (CNS) including the spinal cord.
Atypical facial pain (AFP) is a type of chronic facial pain which does not fulfill any other diagnosis.
Atypical hemolytic uremic syndrome (aHUS) is an extremely rare, life-threatening, progressive disease that frequently has a genetic component.
Atypical pneumonia, also known as walking pneumonia, is the type of pneumonia not caused by one of the pathogens most commonly associated with the disease.
Atyrau (Kazakh: Атырау, Atıraw, اتىراۋ, pronounced [ɑtərɑ́w]; Russian: Атырау [ɐtɨˈraʊ]), known as Guryev (Russian: Гурьев [ˈɡurʲjɪf]) until 1991, is a city in Kazakhstan, and the capital of Atyrau Region.
Atypical trigeminal neuralgia (ATN), or type 2 trigeminal neuralgia, is a form of trigeminal neuralgia, a disorder of the fifth cranial nerve.
Atypical depression, or depression with atypical features as it has been known in the DSM IV, is depression that shares many of the typical symptoms of the psychiatric syndromes major depression or dysthymia but is characterized by improved mood in response to positive events.
The Atyap people, also known as the Kataf by the Hausa people, are an ethnic group that occupy part of the Zangon-Kataf Local Government Area of Kaduna State, Nigeria.
Atypical ductal hyperplasia, abbreviated ADH, is the term used for a benign lesion of the breast that indicates an increased risk of breast cancer.