Cancers of the lung

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  • Опубліковано 31 лип 2024
  • This is a short video describing the four most common carcinomas of the lung.
    I created this presentation with Google Slides.
    Image were created or taken from Wikimedia Commons
    I created this video with the UA-cam Video Editor.
    ADDITIONAL TAGS:
    Cancers of the lung
    The most common carcinomas that originate in the lung parenchyma
    Squamous cell carcinoma
    Adenocarcinoma
    Large-cell undifferentiated carcinoma
    Small-cell carcinoma
    Non-small-cell
    carcinomas
    Squamous cell carcinoma
    Smokers (98%)
    Often arises centrally/proximally in larger bronchi more than peripheral lung
    Occurs in bronchi more than larynx and trachea bc flow more turbulent
    Associated with hypercalcemia (secretes PTH-like cmpd); causing weakness, dehydration, AMS
    Might see desmosomes and/or keratin accumulation (keratin pearls)
    Can cause obstruction of airway, atelectasis, collapse of lung
    Can invade lymphatics
    Can cause clubbing
    Squamous cell carcinoma
    Adenocarcinoma
    Large-cell undifferentiated carcinoma
    Small-cell carcinoma
    Adenocarcinoma
    Most common carcinoma in nonsmokers (but 80% are smokers)
    More likely to be peripheral than central/proximal
    Might see glands and/or mucin production on histology
    Hypertrophic osteoarthritis (HPO) triad has clubbing, long bone swelling, and arthritis
    Adenocarcinoma in situ (formerly: "Bronchioloalveolar carcinoma" (BAC))
    Lepidic growth pattern, replaces type I pneumocytes, but no invasion of interstitium
    Can be solitary nodule, multiple nodules (multifocal, bilateral)
    Presents as cough and dyspnea, again +/- mucinous
    Squamous cell carcinoma
    Adenocarcinoma
    Large-cell undifferentiated carcinoma
    Small-cell carcinoma
    Large-cell undif. carcinoma
    Large cells with prominent nuclei
    No desmosomes, no keratin, no mucin staining
    Expression analysis on cDNA microarray
    Squamous cell carcinoma
    Adenocarcinoma
    Large-cell undifferentiated carcinoma
    Small-cell carcinoma
    Small-cell carcinoma
    Exclusively smokers
    Paraneoplastic syndromes:
    Secretes hormones: ACTH (can cause Cushing’s), ADH (Na abnormality)
    Eaton-Lambert (neurologic disorder)
    Fast-growing, rapid progression, early metastases, often high stage at presentation
    Highly responsive to chemo/rad treatment
    Limited → Extensive staging as metastasis outside of hemithorax
    High N/C ratios, frequent mitotic figures, high percentage of cells in division, salt and pepper chromatin, cells aren’t that small
    Squamous cell carcinoma
    Adenocarcinoma
    Large-cell undifferentiated carcinoma
    Small-cell carcinoma

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