1 / 12

Clinical Impression: BRONCHOGENIC CARCINOMA

Clinical Impression: BRONCHOGENIC CARCINOMA. Histopathologic image of small cell carcinoma of the lung. CT-guided core needle biopsy. H & E stain. Non-small cell lung carcinoma. 75% of lung cancer Grows and spreads more slowly than small cell Ca Types: Adenocarcinoma Squamous cell ca

hedy
Download Presentation

Clinical Impression: BRONCHOGENIC CARCINOMA

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Clinical Impression: BRONCHOGENIC CARCINOMA

  2. Histopathologic image of small cell carcinoma of the lung. CT-guided core needle biopsy. H & E stain.

  3. Non-small cell lung carcinoma • 75% of lung cancer • Grows and spreads more slowly than small cell Ca • Types: • Adenocarcinoma • Squamous cell ca • Large cell ca • RB mutation 20%, p16 changes 50%, KRAS mutation 30%, and EGFR 10% Bronchiolo-alveolar carcinoma of the lung with mucin production. Hematoxylin and eosin stain

  4. Pathogenesis of Bronchogenic Cancer

  5. Etiology & Pathogenesis • Cigarette smoking/ Tobacco exposure (~90%) • Occupational associations: asbestos, uranium( in miners), arsenical fumes, nickel,radon gas. • Genetic factors • Chronic lung disease: TB & COPD • Other factors include air pollutions , ionizing radiation .

  6. Etiology & Pathogenesis Initiated by activation of dominant oncogenesand inactivation of tumor-suppressor gene or recessive oncogenes A small subpopulation of cells with a tumor are responsible for the full malignant behavior of the tumor which are called cancer stem cell this will be important to identify since successful treatment of the tumor will require the eradication of this stem cell component.

  7. Activation of Dominant Oncogene

  8. Inactivation of tumor-Suppressor gene • genes involved in lung cancer pathogenesis: p53, RB, RASSF1A, SEMA3B, SEMA3F, FUS1, p16, LKB1, RAR, and FHIT.

  9. Autocrine Growth Factors Inherited Predisposition to Lung Cancer • People with inherited mutation on RB and p53 gene may develop lung cancer. • First degree relative of lung cancer probands have a two to threefold excess risk of lung cancer or other cancer, many of which are not smoking-related. expresses nicotinic acetylcholine receptor nicotine activates signaling pathway in tumor and normal cell that blocks apoptosis  involvement of nicotine directly in lung cancer pathogenesis both as a mutagen and tumor promoter

More Related