2. Carcinoma of the female breast.(Spread and grading) Flashcards
Spread of breast cancer
l- Direct (Local) spread
ll- Lymphatic Spread
III- Blood spread
lV - Transcoelomic spread
Direct (Local) spread of breast carcinoma
- 1st within the breast tissue itself,
- then to the skin, pectoral muscle and fascia,
- then to serratus anterior muscle and chest wall.
Lymphatic Spread of breast carcinoma
Pathogenesis
Bailey & love note on Lymphatic Spread
Routes
Pathogenesis of Lymphatic Spread of breast carcinoma
By both embolization & Permeation
Bailey & love note on Lymphatic Spread of breast carcinoma
The site of the tumour within the breast does not dictate which nodes will be involved:
Axillary L.N: 75-80%
Internal mammary L.N: 20-25%
Posterior intercostal L.N, subscapular L.N, Intercostal L.N: 3%
Routes of Lymphatic Spread of breast carcinoma
according to the site of the tumour within the breast:
Lateral quadrants
Upper quadrants
medial quadrants
Lateral quadrants Routes of Lymphatic Spread of breast carcinoma
drains into pectoral L.N then to central L.N then to apical L.N
Upper quadrants Routes of Lymphatic Spread of breast carcinoma
Pierce pectoralis major muscle & clavipectoral fascia directly to the apical L.N
medial quadrants Routes of Lymphatic Spread of breast carcinoma
drain into internal mammary L.N of both sides then to mediastinal L.N
or Reach the lymphatics of rectus sheath and then:
1) to the porta hepatis and liver through lymphatics in the falciform ligament
2) To umbilicus (sister Joseph nodules of mayo-clinic)
Blood spread of breast carcinoma
- Common sites
- Bone secondaries
- The order of frequency of bony metastases
- Blood micro-metastases
Common sites of Blood spread of breast carcinoma
- Bone
- Lung
- Liver
- Brain
Bone secondaries in Blood spread of breast carcinoma
Bone secondaries are very common and are osteolytic, very rarely osteosclerotic
The order of frequency of bony metastases in Blood spread of breast carcinoma
1- Lumber vertebrae
2- femur
3- thoracic vertebrae
4- Ribs
5- Skull
Blood micro-metastases in Blood spread of breast carcinoma
The carcinoma of the breast considered a systemic disease from the start as it spreads by blood micro-metastases very early
explain the frequent Bone dissemination in the absence of lung metastases
It has been suggested that tumour cells may spread via the paravertebral venous plexus, which has direct connections with the breast through the posterior intercostal veins
why is the carcinoma of the breast considered a systemic disease from the start
as it spreads by blood micro-metastases very early
Trans-coelomic spread of breast carcinoma
- Pathogenesis
2. Common sites
Pathogenesis of Trans-coelomic spread of breast carcinoma
It’s now proved to be due to retrograde lymphatic permeation
Common sites of Trans-coelomic spread of breast carcinoma
a) Ovaries: krukenburg’s tumour.
b) Nodules in Douglas pouch : Blumer’s shelf nodules.
what is the krukenburg’s tumour
any secondaries affecting the ovaries
Blumer’s shelf nodules
Nodules in Douglas pouch (Transcoelomic spread of cancer breast)
Staging of cancer breast by
TNM classification
TNM classification in staging of cancer breast
- Primary tumour (T)
- Regional lymph nodes (N)
- Metastasis (M)
Primary tumour (T) in TNM classification in staging of cancer breast
Tx
T0
Tis
T1
T2
T3
T4a
T4b
T4c
Meaning of Tx in Primary tumour (T) in TNM classification in staging of cancer breast
can’t be assessed
Meaning of T0 in Primary tumour (T) in TNM classification in staging of cancer breast
No evidence of primary tumour.
Meaning of Tis in Primary tumour (T) in TNM classification in staging of cancer breast
Carcinoma in situ ( DCIS, LCIS or Paget’s disease with no mass )
Meaning of T1 in Primary tumour (T) in TNM classification in staging of cancer breast
Tumour less than 2 cm greatest diameter.
Meaning of T2 in Primary tumour (T) in TNM classification in staging of cancer breast
Tumour 2-5 cm.
Meaning of T3 in Primary tumour (T) in TNM classification in staging of cancer breast
Tumour > 5 cm or fixation to pectoral muscle.
Meaning of T4a in Primary tumour (T) in TNM classification in staging of cancer breast
Tumour of any size with direct extension to chest wall
Meaning of T4b in Primary tumour (T) in TNM classification in staging of cancer breast
Tumour of any size with skin fixation
Meaning of T4c in Primary tumour (T) in TNM classification in staging of cancer breast
Inflammatory carcinoma
chest wall includes all of the following except:
- ribs
- intercostal muscle
- serratous anterior muscle
- pectoral muscle and fascia
pectoral muscle and fascia
Regional lymph nodes (N) in TNM classification in staging of cancer breast
N0
N1
N2
N3
Meaning of N0 in Regional lymph nodes (N) in TNM classification in staging of cancer breast
No L.N metastasis.
Meaning of N1 in Regional lymph nodes (N) in TNM classification in staging of cancer breast
Mobile ipsilateral axillary L.N
Meaning of N2 in Regional lymph nodes (N) in TNM classification in staging of cancer breast
Fixed ipsilateral axillary L.N
Meaning of N3 in Regional lymph nodes (N) in TNM classification in staging of cancer breast
Ipsilateral supraclavicular L.N
other textbooks consider:
N3:palpable ipsilateral internal mammary L.N
M1: palpable ipsilateral supraclavicular L.N
Metastasis (M) in TNM classification in staging of cancer breast
M0
M1
Meaning of M0 in Metastasis (M) in TNM classification in staging of cancer breast
No distant metastasis
Meaning of M1 in Metastasis (M) in TNM classification in staging of cancer breast
Distant metastasis including contralateral Axillary L.N and breast
(or palpable ipsilateral supraclavicular L.N)
Interpretation of TNM classification in staging of cancer breast
Clinical Significance of stages
Interpretation of stages
Clinical Significance of stages in Interpretation of TNM classification in staging of cancer breast
Clinical Significance of stage one and two
Clinical Significance of stage three
Clinical Significance of stage four
Clinical Significance of stage one and two in Interpretation of TNM classification in staging of cancer breast
Curable breast cancer
Clinical Significance of stage three in Interpretation of TNM classification in staging of cancer breast
Locally advanced breast cancer
Clinical Significance of stage four in Interpretation of TNM classification in staging of cancer breast
metastatic breast cancer
Interpretation of stages of TNM classification in staging of cancer breast
Stage 0
Stage I
Stage IIA
Stage IIB
Stage IIIA
Stage IIIB
Stage IIIC
Stage IV
Interpretation of Stage 0 of TNM classification in staging of cancer breast
Tis N0 M0
Interpretation of Stage I of TNM classification in staging of cancer breast
T1 N0 M0
Interpretation of Stage IIA of TNM classification in staging of cancer breast
T2 N0 M0
T1 N1 M0
T0 N1 M0
Interpretation of Stage IIB of TNM classification in staging of cancer breast
T3 N0 M0
T2 N1 M0
Interpretation of Stage IIIA of TNM classification in staging of cancer breast
T0-3 N2 M0
T3 N1-2 M0
Interpretation of Stage IIIB of TNM classification in staging of cancer breast
T4 N0-2 M0
Interpretation of Stage IIIC of TNM classification in staging of cancer breast
any T N3 M0
Interpretation of Stage IV of TNM classification in staging of cancer breast
any T any N M1