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KembaraXtra - Medical Terms - abiraterone acetate
​ Abiraterone acetate is an oral medication used to treat metastatic prostate cancer that is resistant to standard hormonal therapy. It works by reducing testosterone production in the prostate and adrenal glands through inhibition of the enzyme cytochrome P450 17A1, which plays a key role in androgen synthesis. Possible side-effects include fluid retention (oedema), liver abnormalities, high blood pressure, and low potassium levels. Its trade name is Zythiga.



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KembaraXtra - Medical Terms - abiotrophy
​Abiotrophy refers to the gradual degeneration or loss of function of a tissue or organ without a clearly identifiable cause. An example is retinal abiotrophy, in which progressive deterioration of the retina leads to worsening vision. This condition can occur in inherited disorders such as retinitis pigmentosa.



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KembaraXtra - Medical Terms - abfraction
​Abfraction is a dental condition characterized by notching or wear at the neck of a tooth near the gum line. It occurs due to mechanical stress from improper bite alignment, which causes the tooth to flex repeatedly. Over time, this stress leads to separation of the enamel from the underlying dentine.



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KembaraXtra - Medical Terms - aberration
​ Aberration, in optics, refers to a flaw or imperfection in the image produced by an optical device such as a lens. In chromatic aberration, coloured fringes appear around an image because different colours of light are refracted to varying degrees. In spherical aberration, the image becomes blurred because light rays passing through the outer edges of a lens are bent more than those passing through the centre, causing them to focus at slightly different points. This effect can occur even when only one colour of light is used.



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KembaraXtra - Medical Terms - aberrant
​The term aberrant describes something that is abnormal or deviates from the usual pattern. In medicine, it most commonly refers to a blood vessel, nerve, or anatomical structure that does not follow its typical course or position within the body.



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KembaraXtra - Medical Terms - abductor
​An abductor is any muscle that moves a limb or body part away from the midline of the body or away from another structure. This movement is known as abduction. For example, certain muscles in the shoulder and hip function as abductors to lift the arm or leg outward from the body.



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KembaraXtra - Medical Terms - abduct
​To abduct means to move a limb or body part away from the midline of the body. The action is known as abduction, and muscles that perform this movement are called abductors.
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KembaraXtra - Medical Terms - abducens nerve
​ The abducens nerve is the sixth cranial nerve (VI) and supplies the lateral rectus muscle of the eye, enabling outward movement of the eyeball; damage to this nerve may result in double vision.



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KembaraXtra - Medical Terms - abdominoperineal resection
​ Abdominoperineal resection is a surgical procedure performed for cancers involving the anal canal or lower rectum. It involves removal of the anal sphincter, rectum, and part of the sigmoid colon, with the remaining colon brought through the abdominal wall to form a permanent colostomy (stoma).



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KembaraXtra - Medical Terms - abdominal thrusts (Heimlich manoeuvre) Abdominal thrusts, also known as the Heimlich manoeuvre, are an emergency technique used to relieve choking. The rescuer stands behind the patient, places a fist below the ribcage, and delivers quick inward and upward thrusts to expel the obstructing object from the airway; it should not be used on infants under one year old.


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