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The pulmonary valve is situated between the lower right heart chamber (right ventricle) and the pulmonary arteria’sPulmonary valve stenosis is a...

Overview Pyoderma gangrenosum  is a rare condition in which large, painful ulcers  develop on your skin, most often on your legs. It affec...

Q fever is a bacterial infection that is caused by Coxiella burnetii. It is a common bacteria found in sheep, cattle and goats across the world. You c...

Overview Immediately linked to the bite or scratch of a stray animal and all those injections in the stomach, Rabies is a serious viral infection. Gen...

Radiation therapy is used widely to treat cancer, but it has side effects such as Radiation enteritis . Radiation enteritis is usually  temporary...

Radiation sickness is an illness resulting from a high exposure to ionizing radiation. This is an acute illness triggered by irradiation of the full...

Ramsay Hunt syndrome  or herpes zoster oticus happens when a shingles outbreak affects your facial nerve near one of the ears. The virus that cau...

Raynaud’s disease occurs when the small arteries in your fingertips and toes narrow  in response to cold or stress, limiting blood flow to affec...