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what is asthma? epidemiology signs symptoms prevention and treatment of asthma.

ASTHMA:  The word "asthma" is   from the Greek ásthma, which means "panting". DEFINITION : A common lung disorder in which inflammation causes the bronchi to swell and narrow the airways, creating breathing difficulties that may range from mild to life-threatening.            “ OR “ Asthma is a chronic disease characterized by recurrent attacks of breathlessness and wheezing, which vary in severity and frequency from person to person.(WHO). Normal airway, Asthmatic airways, Asthmatic airway during attack              ·         Asthma was recognized as early in ancient egypt. ·          It  is a common long term inflamatory disease of the airways of the lungs. ·         It is characterized by variable and recurring symptoms, reversible air flow obstr...
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lung cancer

Definition: The World Health Organization (WHO) defines lung cancer as tumors arising from the respiratory epithelium (bronchi, bronchioles, and alveoli). OR Lung cancer is a type of cancer caused by uncontrolled cell division of the respiratory epithelium (bronchi, bronchioles, and alveoli). Normal structure and function of the lungs: Lungs are 2 sponge, pyramid-like organs located in the chest. Each lung is divided into sections called lobes. The right lung has three lobes while the left lung has two lobes. The left lung is smaller than the right one because the heart on the left side takes up more room of the chest. When you inhale air through mouth and nose it enters into lungs through trachea (windpipe). The trachea divides into tubes called bronchi, which enter the lungs and divide into smaller branches called bronchioles. At the end of bronchioles there are small tiny sacs called alveoli. These alveoli absorb oxygen from the inhaled air into your b...
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A 36-year-old woman presents to her general practitioner (GP) complaining of spontaneous bruising mainly on her legs

history A 36-year-old woman presents to her general practitioner (GP) complaining of spontaneous bruising mainly on her legs. The bruising has been noticeable over the last 4–6 weeks. She cannot remember any episodes of trauma. In addition, her last two menstrual periods have been abnormally heavy, and she has suffered a major nosebleed. She otherwise feels well and is working full time as a secretary. There is no significant past medical history. She is married with one daughter aged 11 years. There is no family history of a bleeding disorder. She is a non-smoker and drinks a small amount of alcohol socially. Examination On examination, there are multiple areas of purpura on her legs and to a lesser extent on her abdomen and arms. The purpuric lesions vary in color from black–purple to yellow. There are no signs of anemia, but there are two bullae in the mouth and there is spontaneous bleeding from the gums. There are no retinal hemorrhages on funduscopy. Blood pressure is 118/7...
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