Oncology: Principles in Oncology Rehab 1 Flashcards
WHY do PTs need to know about pts w/ Cx
- ALL systems affected
- ALL ages affected
- Cx and Tx affects function + mobility
-
ICF
- Body function and Structure==Impairments
- Activity=Limitations
- Participation=Resstrictions on life situations
-
ICF
PT settings where you will see oncology pts
ALL of them!!!
Estimated New Cx Cases in US
see pics
Carcinogenesis Terminology:
what is Cx?
- Alteration of differentiation so that malignant cells cannot be recognized by its origin parent cells
- **ANAPLASTIC
Carcinogenesis Terminology:
Dysplasia
- GENERAL disorganization of cells
- MAY BE REVERSIBLE
Carcinogenesis Terminology
Metaplasia
- DISORDERLY cell patterns
- REVERSIBLE AND BENIGN
Carcinogenesis Terminology
Hyperplasia
- INCd # of cells creating a tissue mass
- NEOPLASTIC HYPERPLASIA
Tumor, Neoplasm, Malignancy
- a NEW growth
- Any abnormal mass or tissue which exceeds the growth of NORM tissue
- SERVES NO USEFUL PURPOSE
- Benign OR malignant
Cx defined:
A group of dis’s characterized by uncontrolled growth and spread of abnorm cells
Benign
Characteristics:
- SLOW growing
- Encapsulated (one area)
- NON-invasive
- Tumor cells are SIMILAR to originating tissue
- HIGHLY differentiated
- **can still be very serious or life-threatening depending on location or size
Malignant
Characteristics:
- RAPID uncontrolled growth
- NON-encapsulated (spread out)
- Destructive to surrounding tissue
- NOT WELL-DIFFERENTIATED
- **Ability to metastasize
Dx of Cx:
S/S
- PAIN
- Fatigue
- Palpable lump
- Wt. Loss—-often unexplained
- Fx***
- iatrogenic fx’s
- *sometimes FIRST sign of metastatic cx
- Dis specific sx’s
Dx of Cx
S/S
Paraneoplastic Syndromes
- Tumor producing s/s AWAY from primary or metastatic site
- thru production/secretion of hormones
ONLY WAY TO DEFINITIVELY Dx A Cx
BIOPSY ***
Dx: Exams and Tests to detect Cx
- Blood tests
- Palpation + Clinical exam
- Radiography
- US
- MRI
- Bone Scan****
- Lab tests
- stool sample
- sputum
- cytology
-
Site specific Tests
- colonoscopy
- mammography
- sigmoidoscopy
- Pap smear
- bronchoscopy
-
BIOPSY***
- ONLY definitive way to Dx Cx
BIOPSY
*only way to definitively Dx Cx
Different methods:
- Curettage (Pap smear)
- fluid aspiration
- Fine needle aspiration
- Core needle biopsy
- Dermal punch
- Endoscopy
- open excision
- Sentinel lymph node biopsy
- stereotactic biopsy
- robotic needles
Dx of Cx and Genetics???
Only a SMALL portion of cx’s linked to a single gene are inherited
*only 5-10%
Dx of Cx: Genetics
MOST COMMON Cx WITH A FAMILIAL PATTERN:
PBOC
- Prostate
- Breast
- Ovarian
- Colon
Dx of Cx: Genetics
Oncogenes
- Ability to transform norm cells INTO malignant cells by hyperactivation
Dx of Cx: Genetics
Tumor suppressive genes
- Regulate growth and inhibit carcinogenesis
Dx of Cx: Genetics
What leads to aggressive cell proliferation? (dividing and spreading of cx cells)
- Defects in BOTH oncogenes and tumor suppressive genes leads to aggressive cell proliferation
- MORE oncogenes and LESS tumor suppressive genes==> Aggressive cell proliferation
Research ID and cataloguing genes that are assoc’d w/ Cx
- BRCA 1, BRCA2
- Cx suppressor is mutated
Dx of Cx: Genetics
In contrast to genetics, ________ all cx may be caused by environmental agents (carcinogens) OR viruses
50%
NON-modifiable risk factors for Cx
Age
Genetics+Family Hx
Gender
Race
Ethnicity
MODIFIABLE Risk Factors for Cx
-
Dietary improvements
- HIGH fruits+veggies
- limtd animal meat/fat
- multivitamin w/ folate–> DNA repair
- Limtd alcohol intake
- safe sex
- wt. control + obesity prevention
- Phys activity
- tobacco prevention+cessation
- environmental exposure including sun protection
- participating in screenings
Staging of Cx
What is Staging used for?
Process to describe extent of disease
- aids in Tx planning
- Predicts clinical prognosis
- Compares results of tx
2 types of staging in terms of clinical vs. disease state
Clinical staging vs. Pathologic staging
Types of Staging
- I-IV
- TNM
- Grades
- In situ-distant spread
Staging Cx
See pics for ENTIRE CHART
Staging Cx I-IV
Stage 0
In situ, pre-malignant
Staging Cx: I-IV
Stage I
- <2 cm
- LIMTd to LOCAL site therefore easily resectable
- *BEST CHANCE OF SURVIVAL– 70-90%
Staging Cx: I-IV
Stage II
- 2-4/5cm
- Invasion to organ OR adjacent tissue
- Microinvasion to lymphatic system
- Resectable BUT uncertain of clear margins
- Survival rate ~50%
Staging Cx: I-IV
Stage III
- 5 cm
- Invasion INTO lymphatic system
- Operable but not resectable
- Survival ~20-25%
Staging Cx: I-IV
Stage IV
- 10cm
- Metastatic lesions (regional OR distant)
- Inoperable for resection
- *Survival 5%
MOST commonly used system for Staging
Particularly for Solid Tumors
TNM
- T=Tumor size
- N=absence of presence of Lymph Nodes
- M=absence or presence of Metastases
TNM Staging
T=Tumor size
Tumor size
- Tx: primary tumor cannot be assessed
- T0: NO evidence of primary tumor
- T1-T4: Progressive INC in tumor size
TNM Staging
N= regional Lymph Node involvement
N=Lymph Node involvment
- Nx: nodes cannot be assessed
- N0: No metastases to local lymph nodes
- N1-3: Progressive involvement to regional lymph nodes
TNM Staging
M=presence of distant Metastases
M=distant Metastases
- Mx: presence of distant mets cannot be assessed
- M0: No distant metastases
- M1: Presence of distant metastases
Grades of Tumor or Cx
Explain…
- Provides measure of differentiation
- Information on size, shape, rate of cell division
- indicates Aggressiveness
Grades of Tumor or Cx
3:
- LOW: Better predictive and prognostic outcome
- INTERMEDIATE
- HIGH: Poor cellular differentiation, likely to metastasize EARLY
In Situ to Distant Spread
Broken down into 5 categories
- In-Situ
- Local spread
- Regional spread
- Distant spread
- Carcinomatosis
In situ to Distant spread
In-situ
Orig layer of cells which are contained w/in tissue
In situ to Distant spread
Local spread
- Penetration OUTSIDE orig layer of tissue
In situ to Distant spread
Regional spread
- Spread to nearby tissue or lymph nodes in area of origin
In situ to Distant spread
Distant spread
- Spread to other organs or areas of body
In situ to Distant spread
Carcinomatosis
- WIDESPREAD end-stage disease
Mechanisms of Metastasis
Primary Disease
- cells CAN BE ID’d from primary organ
Mechs of Metastasis
When does Metastases occur?
- occurrs when cells break from primary tumor and travel by circulatory OR lymphatic system to DISTANT AREAS of the body
- tumor cells become trapped in the capillaries of distant organs
Metastases occurs in other ways:
- Growth extension and invasion into adjacent tissue
Metastasis is often to body areas of _________
Examples?
High blood flow
- Lungs
- Liver
- Brain and CNS
- Lymphatic system
- Skeletal system
Pts found w/ and w/out metastases
- 30% pts found w/ metastases on Dx
- 30-40% pts w/ hidden mets @ Dx
Eval of Metastases
Methods:
- Radiograph
- Bone scans
- CT
- MRI
- *particularly for spinal involvement
-
PET scan
- *for cells that metabolize glucose unusually fast
- Lab tests
- Ca* lvls
- Serum markers