Oncology/Palliative Care Flashcards
What is carcinogenesis
3 step process of malignant transformation
1. Initiation: carcinogens cause mutation in cellular DNA and escape protective mechanisms resulting in permanent cellular mutations
2. Promotion: altered cells have repeated exposure to promoting agents (co-carcinogens) which cause proliferation and expansion of cells
3. Progression: altered cells exhibit malignant beh
Causes of carcinogenesis
Viruses and bacteria
Physical agents
Chemicals
Genetics
Lifestyle
Hormones
Primary prevention of cancer
Reduces risks of dz through health promotion and risk reduction
Ex. immunizations for HPV and HBV vaccines
Secondary prevention of cancer
Screening and early detection to identify pre-cancerous lesions and early-stage cancer in asymptomatic pt
Ex. colonoscopy, pap smears
Tertiary detection and prevention
Monitoring and prevention of recurrence of primary cancer
Ex. cancer pt are assessed for secondary malignancies such as lymphoma and leukemia
Diagnosis of cancer
Physical assessment
Imaging studies (CT, mammogram, MRI, PET)
Lab tests (PSA, FOBT, Tumor marker)
Procedures (pap smear, colonoscopy, bronchoscopy)
Pathologic analysis (biopsy)
Staging of cancer
Includes tumor size, local invasion, lymph node involvement, distant metastasis
Grading of cancer
The pathologic classification of tumor cells, describes the level of differentiation from the original tissue the cells originated from
Goals of treatment of cancer
Cure
Eradication of malignant dz
Control of growth
Palliation (alleviating symptoms)
External beam radiation therapy (ERBT)
Most common form of radiation
Rays penetrate the body and target tumor with pinpoint accuracy based on mapping from imaging
Proton therapy-newer target ERBT approach
Internal radiation
Localized implantation (brachytherapy)
Systemic radionuclide administration
Caring for pt with radioactive implant
Follow specific instructions from radiology department regarding: maximum time to be spent with patient, shielding equipment, special precautions
Pt in private room
Posting signage regarding radiation precautions
Pregnant women are not assigned to care for pt
Prohibiting children
Limiting visitors to 30 minute daily visits
Maintaining 6-feet distance
Radiation toxicity
Altered skin integrity: alopecia, radiomastititis
Altered oral mucosa: stomatitis, decreased salivation and xerostomia, change in taste, mucositis
Alteration in bone marrow: anemia, leukopenia, thrombocytopenia
Systemic effects: fatigue, malaise, anorexia
Late effects: occur 6 months to years after treatment
-fibrosis, atrophy, ulceration, necrosis
Chemotherapy
Antineoplastic drugs to kill cancer cells- non specific
Treatment of systemic dz rather than localized tumor
Often combined with other types of treatment
Goals: cure, control, or palliative
Chemotherapy drugs are classified based on their MOA and how they affect cell cycle
May be given with chemo protectant medications
Can be given in a variety of settings with various routes of administration
Accurate dosing is a major safety concern
Complications of chemotherapy administration
Extravasation: irritant vs vesicant
Hypersensitivity rxn
Chemo toxicities