Neoplasia Flashcards
Neoplasia
new growth, abnormal mass of tissue
Oncology
the study of tumors
Benign neoplasm
does not spread of invade (-oma)
Malignant neoplasm
cancer (-sarcoma or carcinoma)
Glioma
tumor originating in CNS
Leukemia
malignancy originating from blood forming elements
Hematoma
NOT a growth but collection of blood
Melanoma
malignant neoplasm of skin
benign –> nevus
Adeno
glandular origin
Sarcoma
mesenchymal cell origin
Carcinoma
epithelial cell origin
Carcinoma in situ
tumors of epith cell origin that havent invaded the basement membrne
Parenchyma
actual neoplastic cells
Stroma
support structures
Benign Growth Metastases Appearance Histology BVs Mitosis Effects Outcome
Slow None loalized; generally not invasive Well differentiated Inc and well formed Normal Localized unless functional Pos except can be biologically malignant
Biologic Malignancy
Neoplasia that is benign but can result in death because of its anatomical position or function
Malignant Growth Metastases Appearance Histology BVs Mitosis Effects Outcome
Rapid Yes Invasive, crab like, adheres Varies from well diff to anaplastic Numerous and poorly formed Numerous and abnormal Systemic Varies
Metastasis
Neoplastic cells at sites distant from primary tumor
Primary feature of malignant tumors
Pathways for metastasis
lymph system
blood vessels
seeding
Common sites for metastasis
lymph nodes lungs (often first organ to filter) liver (primary for GI neoplasis) Bone (initial presenting site for breast, pelvic and prostate) CNS - lung, breast, lymphoma, melanomas
Differentiation
Differentiated tumor cells resemle normal cells and tend to grow and spread at a slower rate
Undifferentiated cells
lack structure and function of normal cells and grow uncontrollably
Grading
based on cell differentiation Well differentiated Intermediate Undifferentiated Anaplastic - no characteristics of original tissue cells, high variance in size and shape
Staging
describes the extent or severity of the cancer based on extent of the priamry (original) tumor and extent of spread in the body
Staging is more predictive