Unit 1 - Chapter 19 - Cancer Medicine Flashcards
what is cancer caused by
abnormal and excessive growth of cells
what do cancer cells accumulate as
malignant tumors
what are the 3 things malignant tumors do
they compress, invade and destroy the surrounding normal tissue
how do cancerous cells spread throughout the body
through the bloodstream or lymphatic vessels
what are the 3 most common cancers for women
lung, breast and colorectal
what are the 3 most common cancers for men
lung, colorectal and prostate
what are neoplasms
new growths that arise from normal tissue
what does benign mean
non cancerous
what are the 4 traits of benign tumors
- slow growing
- encapsulated and noninvasive
- well differentiated
- nonmetastatic
what are the 4 traits of malignant tumors
- rapid growth
- invasive and infilitrative
- anaplastic and undifferntiated
- metastaic
malignant tumors are anaplastic, expand on that
their dna stops making normal codes that allow the cells to carry on the function of differntiating mature cells
what can dna damage be caused by
toxic chemicals, sunlight, smoke, viruses
what are some examples of chemical carcinogens
asbestos, dyes, hormones, hydrocarbons, insecticides
what are some examples of radiation carcinogens
sunlight, x-rays, radioactive substances
what are some examples of virus carcinogens
- human T cell lukemia virus, hpv, hepititis B and C
what are oncogenes
normal pieces of dna that when activiated by a mutation can convert a normal cell to a cancerous one
what is histogenesis
identifying something based on the type of tissue
what is a carcinoma
a solid tumor
what is a adenoma
a tumor that is of epithelial or glandular origin
what is a sarcoma
tumors derived from connective tissues
what is mesenchymal tissue
the embryonic connective tissue from which sarcomas are derived from
what are mixed tissue tumors
tumors derived from epithelial and connective tissues
what does cystic mean
forming large open spaced filled with fluid
what are mucinous tumors filled with
mucous
what are serous tumors filled with
serum
what does fungating mean
mushrooming pattern of growth in which tumor cells pile one on top of another and project from a tissue surface
what does inflammatory mean
having the features of inflammation - redness, swelling, heat
what does medullary mean
large, soft, fleshy tumors
what does necrotic mean
containing dead tissue
what does polypoid mean
growths that form projections extending outward from a base
what do sessile polypoids extende from
a broad base
what do pedunculated polupoids extend from
a stem or stalk
what does ulcerating mean
characterized by an open, exposed surface resulting from the death of overlying tissue
what does verrucous mean
resembling a wart like growth
what does alveolar mean
tumor cells form patterns resembling small sacs
what does carcinoma in situ mean
referring to a localized tumor cell that have not invaded adjacent structures
what does diffuse mean
spreading evenly throughout the affected tissue
what does dysplastic mean
containing abnormal-appearing cells that are not clearly cancerous
what does epidermoid mean
resembling squamous epithelial cells (thin, plate like)
what does follicular mean
small, round gland type clusters
what does papillary mean
forming small, finger like or nipple like projections of cells
what does pleomorphic mean
composed of a variety of types of cells
what does scirrhous mean
densely packed tumors, due to dense bands of fibrous tissue
what does undifferentiated mean
lacking any microscopic structures typical of normal mature cells
what is grading cancer based on
the appearence
what is staging cancer based on
the extent of the spread
expand on grade 1 tumors
very well differntiated
expand on grade 2 and 3 tumors
moderately/poorly differntiated
expand on grade 4 tumors
so undifferentiated or anaplastic that even recognizing the tissue of origin can be difficult
what are the 3 notations in a staging system for cancer
t - tumor
n - nodes
m - metastasis
what does tnm stand for in terms of the staging system
tumor-node-metasis international staging system
what is cauterization
destructions of tissue by burning
what is a core needle biopsy
placement of a large bore needle that extracts a core of tissue
what is cyrosurgery
use of subfreezing temperature to destroy tissue
what is en bloc resection
tumor is removed along with surrounding tissue containing lymph nodes or areas of tumor spread
what is excisional biopsy
removal of tumor and a margin of normal tissue