Lymphoid System Flashcards
Cancer invade by contiguity
Grow into
Cancer invade by metastasis
Dissemination
3 ways metastasis occurs
Direct seeding or serous membranes of body cavities
Lymphogenous spread
Hematogenous spread
What is the most common route for the initial dissemination of carcinomas
Lymphogenous
How are less common but more aggresssive (sarcoma) cancers spread by metastasis
Hematogenous
Metastisis more in veins or arteries
Veins-thinner wall offer less resistance
Since metastasis follow venous flow what are the most common sites of secondary sarcomas
Liver and lungs
Lymphangitis
Secondary inflammation of lymphatic vessel
Lymphadenitis
Secondary inflammation of lymph nodes
How may lymphangitis or lymphadentis present
Red streaks in the skin and nodes painful and enlarged
Why os lymphangitis, lymphadenitis dangerous
Can lead to sepsis
Lymphedema
Localizedtype of edema, occurs when lymph nodes don’t drain from an area of the body
What happens if cancerous lymph nodes are removed from the axilla
Lymphedema of the limb may occur
Solid growths may permeate lymphatic vessels and form minute celllular emboli which may what
Break free and pass to regional lymph nodes . Spread!