CHAPTER 14: BREAST RECONSTRUCTION Flashcards

1
Q

Describe the anatomy of the breast

A

Boundaries

  • 2nd - 6th rib
  • sternal edge
  • mid axillary line
  • deep superomedial = pec fascia, inferolateral = serratus fascia
  • axillary tail of Spence
  • 10-100 acini -> lobule -> lobe -> lactiferous duct -> nipple
  • lobes separated by fibrous septae, upper breast = suspensory ligaments of Astley Cooper
  • Montgomery’s tubercles = sebaceous glands under areolar

NAC

  • 4TH ics
  • sebaceous glands
  • montgomery glands
  • tubercles of Morgagni (elevations of gland openings)
  • radial smooth muscle fibres (erection)
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2
Q

What is the blood supply to the breast?

A

Similar to blood supply to pec major

  • IMA perforators
  • lat thoracic
  • pectoral branches of thoracoacromial axis
  • anterolateral and medial intercostal perforators
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3
Q

What is the lymphatic drainage of the breast?

A

lateral -> axilla and infraclavicular
medial -> intercostal spaces to int thoracic parasternal nodes (3-20%)
cxns b/t med & lat

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4
Q

What is the nerve supply to the breast?

A

2nd - 6th intercostals
Nipple - 4th intercostal med & lat branches
Overlying skin - cutaneous branches T4-6, lat cutaneous
Lactation - hormonal

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5
Q

Describe the stages of breast development

A

Embryology - breast develops in 4th week as downgrowth from a thickened mammary ridge of ectoderm (milk line) from axilla to inguinal region

Tanner’s stages of pubertal breast dvlpmt
1 - prepubertal
5 - adult

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6
Q

Describe the surface anatomy of the breast

A

Penn - described the ideal breast measurements
Sternal -> nipple & nipple -> = 21cm
Nipple -> IMF = 6.8cm
NAC = 3.8 - 4.5cm

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7
Q

How is bra cup size measured?

A
Measure circumference of chest at IMF & maximal projection
MP - IMF = INCHES
0 = AA
1" = A
2" = B
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8
Q

Breast cancer epidemiology

A

30,000 new cases / yr in UK, 50% req mastectomy
~ 7500 breast recons / yr
50% under 65, 50% of these req mastectomy
2nd most common cancer after skin in women
1 in 8 lifetime risk (12%)
1 in 9 women who live to 85
Breast = 25% of general surgery referrals
90% breast clinic referrals are d/c

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9
Q

What is the aetiology of breast cancer?

A

multifactorial, exo and endogenous factors

  • gender (99% women)
  • age
  • Fhx (no. and proximity), their menstrual status, age of diagnosis, bilat cancer
  • linked w early menarche, late menopause, late 1st pregnancy
  • premalignant histology
  • unilat ca -> inc risk of contralateral ca
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10
Q

How is breast cancer classified histologically?

A

DUCTAL - derive from ductal element (majority)
NON-DUCTAL - derive from epithelium of breast lobules

Non-invasive and invasive (WHO)
malignant transformation process
NORMAL -> HYPERPLASIA ->ATYPICAL HYPERPLASIA -> DCIS -> INVASIVE CA -> takes 10-20yrs
80% adenocarcinoma (males?)
risk of mets increases with no. of +ve nodes, to lung, liver, bone

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11
Q

What types of ductal ca’s are there?

What types of non-ductal ca’s are there?

A

DCIS (intraductal ca - still in bm of ducts)

  • subtypes - comedo, non-comedo
  • 10% bilat, 20% multicentric, 30%->invasive
  • mammogram - microcalcification

Invasive ductal

  • 75% of all breast ca
  • adenoca of ductal elements
  • grey gritty spiculated hard

LCIS

  • no mammogram changes, marker of invasive disease, not precursor (1% -> invasive)
  • usu incidental finding
  • 40% bilateral, 60% multifocal

Invasive lobular

  • 5-10% invasive ca
  • extensively infiltrative /o distinct mass
  • no microcalcification
  • sim prognosis to inv ductal
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12
Q

What are the special types of breast ca?

A

Medullary ca

  • 6% of invasive ca
  • soft fleshy well circumscribed
  • good prognosis even w mets

Tubular ca

  • 2%, = well diff adenoca
  • well diff, good prog

Mucinous / Colloid

  • < 5%
  • soft gel mass
  • well diff, excellent prog

Phyllodes
- mixed CT and epithelial tumour
90% 5yr survival, depends on grade and size of tumour

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13
Q

What are the breast cancer genes?

A

4-5% of all breast ca’s are inherited
AD with high penetrance
>25% of cases under 30y.o. = genetic
> 4 cases under 60 in family = likely genetic
BRCA1 lifetime risk of breast ca = 85%
50% BRCA1 carriers with ca treated by lumpectomy and DXT will develop recurrence / 2nd ca
BRCA 65% risk of ovarian ca by 70
Histo - usu grade 3, ER-ve, medullary type, early onset, bilat
TP53 assoc w sarcoma
BRCA 2 less

Ashkenazi Jews - 2% have BRCA 1/2 mutn

Carriers offered

(a) SSM and recon (risk reducing mastectomy)
- only 90% effective in reducing risk of ca
(b) annual screening
(c) prophylactic tamoxifen - usu not helpful as most are ER-ve

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14
Q

How is a breast lump assessed?

A

Risk assessment - age, FHx, endogenous oestrogen
Triple assessment - clinical exam, radiology, pathology
MDT discussion

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15
Q

UK Breast screening

A
  • women b/t 50-70, gradually 47-73 (2016)
  • identifies 6/1000 screened
  • MRI better for premenopausal women, BRCA pts
    USS (for solid vs cystic)
  • High res USS can identify some cancers and for DXT chemo response
  • MRI for implant imaging
  • linguine sign (implant pulled away from capsule, leaving multiple parallel lines = stepladder sign)
  • snowstorm appearance
  • Eklund mammogram views for breast implants
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16
Q

What is the role of mammograms?

A
  • part of NHSBSP
  • women every 2-3yrs
  • US every yr above 40
  • signs - microcalcifcation, density changes, asymmetry , architectural distortion
  • Swedish trials - decreased 44% mortality w reg mammogram
  • BC f/u - annual mammogram
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17
Q

Staging of breast cancer

A
TNM Staging & 5yr survival (%)
I : <2cm T1 (85%)
II : mobile axillary nodes N1 (65%)
IIIa : fixed axillary nodes N2 (40%)
IIIb : chest wall / skin involvement T4 or int mammary nodes N3 (25%)
IV : distant mets M1 (10%)
Stage 
I Early good prog
II good prog
III  locally advanced, poor
inflammatory BC (III)

TNM staging, Nottingham Prognostic Index

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18
Q

What are the goals of treatment?

A
  • optiimise local control
  • accurate staging
  • longterm survival
  • preserve / restore body form
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19
Q

When is breast conservation surgery considered?

Name a trial supporting this.

A

stage 1-2 disease
contraindicated - multiple lesions, diffuse microcalcification
relative contra - small breast + large ca, radiation induced, ongoing pregnancy

NSABP B06 trial
no diff in survival b/t total mastectomy vs lumpectomy vs lumpectomy and DXT

Current Rx - lumpectomy with -ve margins, DXT, ANS / clearance

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20
Q

BCS - quadrantectomy. How do you reconstruct?

A

usu for T2 tumours
circumareolar orientated mobilisation of breast mound and direct closure of overlying skin
thoraco-epigastic flaps for skin following lower quadrant resection
axillary tail transposition flap for upper outer quadrant
wise pattern reduction
symmetrisizing contralateral breast

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21
Q

What is the follow-up for breast ca?

A

Postop 3mths (check arm mobility)
6mthly 2yrs
annual 4yrs +/- d/c 6yrs

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22
Q

Classify the different types of mastectomy

A
  1. subcutaneous (NAC preserved)
  2. skin sparing (NAC excised)
    - preserves native breast skin & IMF
    - indications: prophylaxis, DCIS,stage 1-2 invasive ca, phyllodes, immediate recon
  3. simple (total)
    - stage 3-4
    - remove entire breast, NAC and skin overlying tumour
  4. modified radical
    - simple mast + ax level 1&2 clearance
  5. risk reducing
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23
Q

What are the indications of risk reducing mastectomy?

A
Hi risk women (>25% lifetime risk)
BRCA 1,2 gene mutation carriers
- contralateral RRM (depends on histo)
- 2 relatives, 1 <60
- 90% risk reduction
- upper outer quadrant - highest risk of recurrence
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24
Q

What is management of the axilla in breast ca?

A

ax LN clearance / sampling
DXT if +ve nodes
prognosis= 90% 5yr with -ve nodes, 60% 1 +ve LN
sentinel LNB
25% clinically normal LN have micromets
Level of dissection - I,II,III (pec minor)

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25
What is the treatment for DCIS?
``` local recurrence - after surgical excision only ~ 30% (50% will become invasive) NHSBP B17 (Fisher 1993) - lump only 16% local recurrence - lump + DXT 7% extensive DCIS => SSM ```
26
What systemic therapies are there for breast ca?
increase disease free survival in premeno CMF C, methotrexate, 5FU FAC - 5FU, A, C AC - doxorubicin, cyclophosphamide Receptors ER/PR TAMOXIFEN / LETROZOLE (postmeno) HER2 (Human epidermal growth factor 2) HERCEPTIN triple -ve
27
What is the role of neo-adjuvant therapy?
neo-adjuvant chemo may downstage tumour size, and allow BCS, but no survival advantage DXT usu postop
28
How does radiotherapy work?
High energy X rays damage tumour cells, whilst normal cells recover b/t cycles eradicate remaining ca cells and reduce local recurrence uses - following lumpectomy - following mastectomy - following ALND (NOT clearance - inc lymph oedema) - neoadjuvant
29
What are the side effects of DXT?
Common - skin rxns: red, hyperpigment, tender, itch, blister - aches, shooting pain - tired Uncommon - lung tissue inflammation (dry cough, SOB) - dec appetite, nausea - axillary hardening, fibrosis, lymphoedema Rare - fibrosis, decrease breast size, telangectasia, fracture, parasthesia
30
What and how do breast cancer drugs work?
``` Oestrogen receptor antagonists aromatase inhibitors (Arimidex, Femara) - blocks androgen to estrogen conversion - should NOT be used premeno (doesnt inhibit ovarian estrogen synthesis gonadorelin analogues (Zoladex - goserelin) cytotoxic chemo trastuzumab (Herceptin) Progestogens Retinoids ```
31
How do you classify breast reconstruction?
``` immediate vs delayed oncoplastic expander implant flap and expander implant flap only ```
32
What are the principles of breast reconstruction?
choice based on - patient - cancer and adjuvant Rx (DXT) - contralateral breast size - availability of autologous tissue Questions to ask - does pt want good match only in bra or in & out of bra? - match contralateral breast to recon or recon to c/l breast? - does c/l breast need symmetrisation? if pt doesn't want c/l breast op, abdo flap can create any shape / ptosis
33
What are the principles of breast conservation surgery & oncoplastics?
better sited scars primary recon of defects - e.g. SSM and immediate recon, or BBR & mastopexy techniques to resect tumour (BCS) BCS lower pole - superior pedicle Wise medial - dermoglandular flap of lat breast tissue with Wise incision central upper - upside down keyhole Therapeutic mammaplasty (McCulley, Nottingham) - use mammoplasty techniques post WLE to avoid contour defects - can use more than 1 pedicle
34
What are the principles of expander implant recon?
suitable for reconstructing small non-irradiated breasts chest wall DXT increases capsular contracture, skin less pliable and doesn't expand, increased risk of wound dehiscence tissue expander - round if small, anatomical for more projection if larger - subpectoral +/- ADM lower pole - base at or lower than contralateral IMF - avoid making pocket too high - overexpand, to create ptosis
35
What is a Becker expander implant?
it consists of an outer layer of low-bleed silicone gel (25=25% gel, 50=50%), with inner cavity for saline expansion. smooth or textured - expansion through remote port, which may be removed or expander may be replaced for permanent impact
36
Expander and flap recon - pros and cons
indication - if implant only or autologous not suitable Pros - easy, reliable, well vascularised tissue (post DXT) low complications Cons - still requires implant, donor scar poor Can do extended LD for more volume
37
How do you classify flap only breast recon?
Pedicled vs free
38
Pedicled TRAM
Described by Holstrom 1979, then Hartrampf 1982 (transverse abdo island flap pedicle = superior epigastrics can be supercharged (IMA, thoracodorsal) turbocharge - link R & L DIEP art and vein fat necrosis 7-16% endoscopic delay - ligate DIEA
39
Free TRAM
``` IMA thoracodorsal (end to end circumflex scapular or thoracodorsal above serratus branch to preserve LD (retrograde flow from intercostal supply to serratus) ``` contraindicated - midline scar, liposuction, prev abdominoplasty
40
Who described the zones of a TRAM flap?
``` Hartrampf I ipsilateral medial II contralateral medial III ipsilateral lateral IV contralateral lateral ``` ``` Holme (2006) - true zones I ipsilateral medial II ipsilateral lateral III contralateral medial IV contralateral lateral ```
41
DIEP flap
most perforators around umbo lat perforators dominant - 55% med 18% single medial row 27%
42
Who described IMA & V for free flap breast recon?
Ninkovic 1995 Arnez BJPS 1995 shorter pedicle needed remove 3rd / 4th costal cartilage >80% TRAMS ipsilateral advantages cf thoracodorsal - spares LD, better positioning, zone IV lateral not medial, avoids lymphoedema risk disadvantages - iatrogenic pneumothorax, resp mvmts during anastomosis
43
What paper looked at abdo scars and TRAM flaps?
Takeishi PRS 1997 Pfannenstiel - investigate (may or may not be divided) lower paramedian - vessels divided lower midline - design flap higher (means transverse abdo scar postop) subcostal - free flap ok based on inf epigastric appendix
44
Who described DIEP flap
Bob Allen 1994 abdo skin and sc tissues based on 1-2 perforators from DIEA intermuscular dissection, DIEA passed through muscle split preserve horizontal nerve flaps can be made sensate must discard zone IV Blondeel 1999 100 free DIEPs no need to go down to ext iliac if IMA/V raise pedicle side 1st, leave other as lifeboat ipsilat ->IMV, contralat -> thoracodorsal vac anatomy - lat br of DIEP connected to perfs = 50% - med & lat branches equal = 15% - 1 common vessel - 30% ``` open up fascia widely 99% success 7% fat necrosis <1% donor bulging turbocharge with SIEV in 8% ```
44
What paper advocates preop angio for DIEP flap?
Masia JPRAS
45
What is the risk of hernia in DIEP and TRAM?
Free TRAM 16%hernia, 14%bulge PRS 2008 Ganem | DIEP <1%, 9%
46
S-GAP flap
Bob Allen 1995 dissect perforator through gluteus maximus to sup gluteal artery skin 29x3cm 5-8cm pedicle can make sensate with dorsal br of lumbar segmental to 4th intercostal adv - if DIEP not possible single perforator, hidden scar, no loss of function, sciatic nerve covered by muscle disadv - fat firmer, scar unsightly, short perforator
47
I-GAP flap
- adv: scar in crease, larger than SGAP - perforators on both sides of sciatic n pedicle 8cm - dissect from greater trochanter then medially
48
Rubens flap
``` Hartrampf 1991 (based on Iliac crest flap (Taylors) deep circumflex iliac vessels long consistent pedicle need to carefully repair muscles of donor site ```
49
Lateral transverse thigh flap
TFL muscle on lat circumflex femoral | donor contour defect
50
Superficial inferior epigastric flap
Arnez vessels are v small quick to raise but longer micro artery present in 10%?
51
TMG / TUG flap recon
Transverse myocutaneous gracilis flap perforators in upper 1/3 up to 30cm long (add longus to inf gluteal fold, 10cm wide can be used for augmentation post bariatric, combined with thigh lift can turbo/supercharge using long saphenous
52
Fat injection
for adjustments massive vol / definitive recon controvery calcification may complicate imaging Cytori system - lipoaspirate mixed with stem cells (fat grafting on to expanders prior to definitive implant - fat graft programming. Calabresi and Urena)
53
Anatomy of the nipple
nipple contains ductal cells therefore must be removed areolar is skin appendage & doesn't require resection unless within margins central on breast mound 35-45mm diameter at or just above IMF level
54
What are the goals of nipple recon
position, symmetry, colour, size, projection, ?sensitivity if marked asymmetry - place on pt of max projection ask pt to wear prosthesis / position ECG dot on day of surgery
55
Describe the different ways of nipple recon
``` Nipple graft (Adams 1944) nipple sharing (Millard 1972) - lower 1/2 or tip sutured into minimally de-epithelialised bed other composite grafts - ear lobe - toe pulp - papillomas! ```
56
Name some local flap nipple recons
dermal fat flap (Hartrampf and Culbertson 1984) skate flap (Little, Adv Plas Surg 1987) star flap Anton, Eskenazi and Hartrampf 1991) fish tail McCraw 1992 CV flap (Bostwick 1998) Bell flap (Eng 1996)
57
Other autologous / allogenic nipple recon
cartilage (rib), n=bone, silicone (tends to extrude)
58
Nipple recon
Draw CV flap Skate Stick on Tattoo only Autologous
59
What are the common indications for skin sparing mastectomy?
- prophylactic mastectomy - stage 1-2 invasive breast ca (although BCS and DXT is also adequate Rx) - DCIS - multicentric tumours - Phyllodes tumour - where immediate recon is planned
60
What is the treatment algorithm for breast recon?
SMALL Expander implant LD with implant Extended LD MEDIUM Expander implant LD with implant free flap ``` LARGE free flap (bipedicled DIEP / TRAM) ``` Contralateral breast reduction
61
What are the pros and cons of immediate and delayed breast recon
``` Immediate Pros - 1 main op - more aesthetic - less psychological trauma - cheaper ``` Delayed - loss of native skin envelope and IMF - requires dissection of previously operated / irradiated tissues
62
What was the NICE guidelines for 'Improving breast cancer care'
* all breast cancer patients should be managed by multi-disciplinary teams * breast reconstruction should be available at the initial surgical operation * breast cancer referrals should only be made to units which deal with at least 100 new cases per year * there should be regular network-level audits of service provision and the outcomes attained, including an assessment of patients’ and carers’ experiences.
63
What is the National Mastectomy and Breast Reconstruction Audit?
- described provision of and access to breast reconstruction in England and Wales - evaluated current clinical practice in mastectomy and breast reconstruction - measured outcomes following mastectomy with or without reconstruction - assessed the quality of information provided to women undergoing mastectomy and their satisfaction with the reconstructive choices made.
64
National Breast Mastectomy and Reconstruction Audit 2008 2009
Looked at primarily 18216 women 150 NHS hospitals, 114 independent 1 in 5pts immediate, 1 in 10 had delayed recon 2008 Although overall satisfaction rates of pts are high, there is inequity in availability of IBR, likely due to waiting list targets and providing op for BC pts within 31 days of diagnosis 2009 Pts for IBR increased from 11% 2005-2006 to 21% in 2008-2009 There was a wide variation b/t breast cancer networks, suggesting IBR is more widely available in some BCNs than others
65
NBMRA 2010 2011
2010 local complication - 10% mastectomy only (1 in 5 antibiotics) - 15-18% recon gp (1 in 4 had abx) Implant loss at 3 months following BR 9% of IBR patients 7% of DBR patients Unplanned return to theatre following BR 5% of IBR and 6% of DBR patients Free flap BR who had an unplanned return to theatre 13% of IBR and 11% of DBR patients Unplanned re-admission within 3 months 9% of mastectomy patients, 16% of IBR patients and 14% of DBR patients ``` 2011 Mastectomy only 83% satisfied with appearance clothed 42% unclothed 75% confident in social setting 10% pain in breast area 12% arm pain 41% satisfied with sex life ``` ``` Immediate, delayed breast recon 90 93 59 76 85 92 7 4 8 9 52 60 ```