Lung cancer is a malevolent tumour of the lungs. Generally it is bronchogenic carcinoma (about 90%). Lung cancer is the most poisonous malevolent tumour universally, causing up to 3 million deaths.
Disclosure to carcinogens, such as those present in tobacco smoke, immediately causes small changes to the tissue lining the bronchi of the lungs. This result is increasing, and ultimately with constant exposure more and more tissue becomes damaged until a tumour grows. If the tumour developes inwards it can hinder the air passageway, results in breathing difficulties. The lungs can then failed and infections can increase, leading to lung abscess. The patient here would begin to cough up blood-stained substance. Though, if the tumour grows outwards in to the lung it can not even be observed by the patient before it begin s to spread to other portion of the body.
Symptoms of Lung Cancer -
Initial symptoms of lung cancer can be like to those of later signs. Usual symptoms include:

• coughing up blood
• a bad, constant cough
• panting
• chest pains
• weight loss or loss of appetite
• short breathing
• a croaky voice
• Exhaustion

Depending on the kind of tumor, so-called paraneoplastic phenomena can primarily draw attention to the disease. In lung cancer, this sign can be Lambert-Eaton myasthenic syndrome which is a muscle weakness due to auto-antibodies, hypercalcemia and SIADH. Tumors in the upper (apex) of the lung, identified as Pancoast tumors, can attack the local part of the concerned nervous system, leading to altered sweating patterns and eye muscle harms (a combination known as Horner’s syndrome), as well as muscle weakness in the hands due to assault of the brachial plexus.
Different Forms of lung cancer
There are two key types of lung cancer categorised by the mass and manifestation of the malevolent cells seen by a histopathologist under a microscope: small and non-small cell lung cancer. This classification while based on plain pathomorphological criteria has very significant implications for clinical administration and prediction of the disease.

Metastatic Lung Cancer
Small cell lung cancer
Small cell carcinoma which is also known as oat cell carcinoma is the unusual type of lung cancer, making up 20% of cases. It tends to found in the larger breathing tubes and develops rapidly becoming very large. The oncogene most usually involved is the L-myc. The “oat” cell contains solid neurosecretory granules which produce this an endocrine/paraneoplastic syndrome organization.
Non-small cell lung cancer
Epidermoid carcinoma (or Squamous cell carcinoma) too begins in the bigger breathing tubes but developes slower meaning that the mass of these tumours differs when on diagnosis.
Adenocarcinoma or for slower growing types alveolar cell cancer is a type which begins by the gas-exchanging surface of the lung. It is less densely related to smoking.
Large cell carcinoma is a quick -developing type that develops by the surface of the lung.

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This entry was posted on Friday, April 24th, 2009 at 12:11 am and is filed under Cancer. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.