《肺癌（英）课件》由会员分享，可在线阅读，更多相关《肺癌（英）课件（36页珍藏版）》请在金锄头文库上搜索。
1、Bronchogenic Carcinoma (Lung Cancer),Respiratory department,Definition,Bronchogenic carcinoma refers to the malignant tumor which grows in the bronchus. Originating from mucus or gland of bronchus.,Incidence and mortality,Bronchogenic carcinoma has increased remarkable in incidence and mortality dur
2、ing half of the century and has become the most frequent visceral malignant diseases of men.The mortality of lung cancer hold the first place among all kinds carcinomas.,Etiology,The cause of lung cancer is unknown.It is believed that there are following related factors. 1. Excessive cigarette smoki
3、ng:Smoking index(Brinkman Index) is equal to cigarettes per day smoking time(years). Passive smoking is also a carcinogen factor.,Etiology,2.Atmospheric pollution.It was found that carcinogenic factor is benzpyrene . 3.Occupational factors. 4Radioactivity in the atmosphere . 5.Diets and Nutrition. 6
4、.Chronic irritation. 7.Genetic factors.,Pathology And Classification,1. According to the position of tumor arising from ,it can be divided into two types . Central type:Tumor arises from main bronchus, lobar and segmental bronchus . Peripheral type : Tumor arises beyond segmental bronchus .,Patholog
5、y And Classification,2.According to cytology,it is convenient to classify into four kinds of types. (1).Squamous cell carcinoma. (2).Small cell anaplastic carcinoma. (3).Large cell anaplastic carcinoma. (4).Adenocarcinoma(including alveolar cell carcinoma).,Pathology And Classification,According to
6、the different principles of management,it is divided into two types. SCLC:small cell lung carcinoma. NSCLC:non small cell lung carcinoma.,Clinical features,There are no symptoms of early lung cancer in some patients. Symptoms caused by lung cancer are non-specific:perhaps an audible wheeze or a slig
7、ht cough,symptoms of infection (fever ,purulent sputum) , of obstruction (wheezing,dyspnea), or ulceration of bronchial mucosa (hemoptysis).,Clinical features,1.Respiratory symptoms. (1).Cough:(2).Hemoptysis: (3).Dyspnea.: (4).Wheeze or stridor: (5).Chest pain : (6).Fever:,Clinical features,2.Sympto
8、ms caused by the near organs or tissue involved by tumor. (1).Dysphagia. (2).Hoarseness. (3).Pleural effusion due to invasion of the pleura.,Clinical Features,(4).Horners syndrome.It is caused by invading the cervical sympathetic ganglia on the involved side the pupil is small ptosis of the up eyeli
9、ds,retraction of the eyeball and no sweat of the face. (5)Cardiac effusion,Clinical fetures,(6).Superior vena caval syndrome. Due to obstruction of the superior vena caval,the patient may have noticed that his collar is tight, the neck is enlarged and the jugular vein and the veins of anterior chest
10、 wall are distension and edema of the face. 3.Symptoms caused by metastasis.liver, skeleton,brain, supra clavicle lymph nodes.,Clinical fetures,4.Paraneoplastic syndrome.Because tumor cell can secrete ectopic hormone，antigen or enzyme the patients with Lung Cancer sometimes may have some paraneoplas
11、tic syndrome Including:(1) Collagen tissue disorder such as finger clubbing , hypertrophic pulmonray osteoarthropathy 。,Clinical features,(2)Endocrine disorders including Cushings syndrome ,syndrome of inappropriate antiduretic hormone secretion(SIADHS), (3) Neuropathic or myopathic disorders includ
12、ing polyneuritis ,cerebellar degeneration,mental abnormalitis etc (4) others.,Radiographic Findings,The appearance on the x-ray film depends on the position ,size and stage of the tumor 1.Peripheral type :It may be various such as infiltrative or nodular, lobulated or umbilicus sign,liner protrusion
13、s from the shadow into the surrounding lung, cavitation which is often eccentric irregular in the inner wall owing to the necrosis of the neoplasm.,Radiographic Findings,2 Central type(1) Direct appearance :Unilateral enlargement of the hilar shadow due to the tumor itself or enlarged lymph nodes. (
14、2) Indirect appearance :Including local emphysema;obstructive pneumonia either lobal or segmental; obstractive atalectasis (collapse) lobe or segment.,Advantage of CT:,(1) Some small lesion, lesion behind of cardiac or blood vessel,and pathology located in apical of lung can be found by CT which can
15、t be found by chest x-ray.(2) Lymph nodes along hilar or mediastina can be found by CT.,Fig1 Atelectasis,Right upper lobe,Fig3 Mass With Fuzzy,Right Upper LObe,Fig4 Mass In right Lobe,Lateral portion,Fig5 Cavitating Bronchial Carcinoma,Examination of sputum,Cytologic examination of bronchial secreti
16、ons(or sputum)may reveal exfoliated malignant cells recognizable to the pathologist who is specially trained for such work.The sputum must to be fresh, send on time, repeat(4-6 times),Bronchoscope,Bronchoscope may verify the existence of tumor , of Central type, and cytologic diagnosis of lung cancer should be obtained though FBC .Blind biopsy may be help to the diagnosis of the tumor beyond the range of bronchoscope vision,Fig 1 Normal Trachea,Fig 2 Normal Carina,
