Cancer/Final Exam Flashcards
(207 cards)
Pathophysiology of Cancer
When the cell is dividing DNA malfunctions. The abnormal cells do not die and continue to reproduce. Overgrowth of cells.
Oncogene is activated as result of DNA mutation > tumor suppression is disabled by cancer, the cell keeps dividing (in normal circumstances in inhibits cell division when there is an abnormal cell) > cellular mutation (DNA)
Stages of cancer development
Initiation: irreversable mutation to DNA
Promotion: mutated cells stimulated to divide
Progression: increased growth (speed and invasiveness)
Normal Cells Vs. Cancer Cells
Normal cells: contact inhibition, develop differentiation, contribute to homeostasis
Cancer Cells: no contact inhibition, poorly differentiated (anaplastic - divide rapidly), do not contribute to homeostasis.
Benign Tumor
Local (does not spread) Well defined borders pushes other tissue out of the way slow growth encapsulated easily removed does not tend to recur
Malignant Tumor
invasive doesn't stop at tissue border (spreads) invades and destroys surrounding tissue rapid growth metastasizes to distant sites not always easy to remove can recur
How can tumors be classified?
I. origin
II. specific type of tissue it originates
III. grade
IV. stage - according to TNM system
carcinoma definition
cancer of epithelial tissue - most common
Sarcoma definition
cancer of connective and supportive tissue (bone, cartilege)
myeloma definition
plasma cells cancer (bone marrow)
leukemia definition
blood (aka liquid cancer)
lymphoma definition
lymph node cancer (AKA solid cancer)
Grading of cancer
higher the grade (grade 4) worse prognosis
Classification by stage
T: size of tumor (1-4)
N: lymph nodes (0-3)
M: metastases (0 or 1)
Calcium normal value
8.5-10
metabolic cancer complications
Humoral Hypercalcemia of Malignancy (HHM)
- increased calcium levels D/T bone resorption
Symptom of Inappropriate Antidiuretic Syndrome
- impaired h2o excretion. Increased absorption of urine, pt. .cannot urinate. Edema, low sodium
Tumor Lysis Syndrome
- rapid release of intracellular content into blood (h2o, protein)
- rapid shrinkage of tumor D/T treatment
- excess thirst, muscle weakness, cramps
Hematologic Cancer Complications
Febrile Neutropenia
- decreased neutrophils, WBC low
- patient can get infection easily
Hyperviscosity Syndrome
- increased blood viscosity leading to decreased blood flow
- D/T tumor or treatment
- @ risk for DVT, PE, clot
Structural Cancer Complications
Superior Vena Cava Syndrome
- compromised venous drainage D/T obstruction
- dypnea, chest pain
- raise HOB
Malignant Epidural Spinal Cord Compression
- when cancer metastasize to spine
- neuropathy, numbness
Malignant Pericardial Effusions
- extra fluid collects inside sac around heart D/T cancer in pericardia, lungs
Diet to avoid cancer
- avoid processed food
- increase fiber
eat balanced diet
Prevention of Cancer
- healthy diet
- smoking cessation
- sunscreen
- physically active
- limit alcohol
- regular screening
- vaccinate against Hep B and HPV
Cancer Treatment Goals
- cure
- palliation
- control
Chemotherapy Overview
- treatment of choice for malignancies
- systemic or local
- cytotoxic drugs
- interfere with DNA synthesis and mitosis
Chemotherapy Administration
Oral, injection, infusion
Central catheter or port, no infusion on reg. IV D/T necrotizing tissue if infiltrated
Extravaasation, vesicant
Special PPE, must be certified to admin Chemo, 48-72 hours patient has hazardous waste
Chemotherapy Side Effects
Immunosuppression - most significant. Monitor neutrophil/WBC
Neurological symptoms (confusion, brain fog)
GI symptoms (N/V)
Alopecia
Weight loss
Reproductive organs impacted - early menopause
N/V Nursing Management
Most common side effect of chemo
Give antiemetics (ondansetron, metoclopramide, dexamethasone)
Decrease food order, give small amount of bland food/fluids
Encourage high protein, high carb diet, SFF
medications to stimulate appetite