Breast / Oncological PROSPECT 2020 Moderate Pain Chronic Pain 25–80%

Breast Surgery / Mastectomy

Postoperative pain management for mastectomy, lumpectomy, axillary clearance, and breast reconstruction. Based on PROSPECT 2020 (Jacobs et al., Anaesthesia) — oncological breast surgery guideline.

PROSPECT 2020 ↗

Moderate

Pain intensity

PVB / PECS

First-line blocks

25–80%

Chronic pain incidence

2020

PROSPECT

Overview

Breast surgery encompasses a spectrum from simple lumpectomy to mastectomy with axillary clearance and immediate reconstruction. Postoperative pain is typically moderate, but the procedure carries a disproportionately high risk of chronic pain — affecting an estimated 25–80% of patients to some degree, including phantom breast pain, intercostobrachial neuralgia, and neuropathic pain from nerve injury. This makes acute pain management strategy particularly consequential for long-term outcomes.

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PROSPECT 2020 summary (Jacobs et al., Anaesthesia; literature to Oct 2019): Basic analgesia — paracetamol + NSAIDs — pre- or intraoperatively, continued postoperatively. Pre-operative gabapentin and dexamethasone are also recommended. For major breast surgery, a regional technique (paravertebral block or PECS block) and/or local anaesthetic wound infiltration should be considered for additional pain relief. Paravertebral block may be continued postoperatively via catheter. Opioids reserved for rescue.

Chronic Post-Mastectomy Pain Syndrome

⚠️

A significant proportion of women — estimates range from 25% to 80% — experience persistent pain following breast cancer surgery, compromising functionality and quality of life. This is one of the highest chronic pain rates of any common surgical procedure, making prevention strategy clinically central, not an afterthought.

Recognised contributors and components include:

Intercostobrachial neuralgia — injury to the intercostobrachial nerve during axillary dissection, causing numbness/pain in the upper inner arm and axilla
Phantom breast pain — particularly after mastectomy, analogous to phantom limb phenomena
Neuroma formation at the surgical site or along injured nerve branches
Severe acute pain as an established risk factor for transition to chronic pain — reinforcing the value of effective regional analgesia at the time of surgery

Regional techniques (paravertebral block particularly) have evidence not just for acute pain but for reducing the prevalence of chronic pain after breast surgery when used preincisionally — one of the stronger chronic-pain-prevention signals among PROSPECT-covered procedures.

Analgesic Pathway

🕐 Pre-operative

Paracetamol 1g PO
NSAID PO (if no contraindication)
Gabapentin 300–600mg PO — specifically recommended pre-op
Dexamethasone — can be given pre-op or intra-op
Paravertebral block — pre-incisional, evidence for chronic pain reduction

🔪 Intra-operative

Paravertebral block or PECS block (if not given pre-op)
Dexamethasone 8 mg IV (if not given pre-op)
Paracetamol 1g IV (if not given pre-op)
Local anaesthetic wound infiltration — alternative/adjunct

💊 Post-operative

Paracetamol 1g QDS regular
NSAID regular ≤5 days
Opioid PRN rescue
Continue PVB catheter infusion — major surgery/reconstruction
Early mobilisation

✓ Recommended | ◎ Optional/conditional. Based on PROSPECT 2020 (Jacobs et al.).

Systemic Analgesia

✓ PROSPECT Recommended

Paracetamol + NSAIDs form the basic foundation. Gabapentin and dexamethasone, given preoperatively, are specifically recommended additions for this procedure — gabapentin reflecting the neuropathic component common to breast surgery pain, and dexamethasone for combined analgesic and antiemetic benefit.

Agent	Dose	Route	Timing	Notes
Paracetamol	1 g	IV/PO	QDS, regular	Foundation throughout
Ibuprofen/Celecoxib	Standard doses	PO	QDS/BD	NSAID or COX-2; ≤5 days
Gabapentin	300–600 mg	PO	Pre-op, 1–2h before	Specifically recommended for this procedure — neuropathic pain component
Dexamethasone	8 mg	IV	Pre-op or intra-op	Analgesia + PONV prophylaxis
Oxycodone	5–10 mg	PO PRN	4–6h	Rescue only

Regional Blocks

For major breast surgery (mastectomy ± axillary clearance, reconstruction), regional technique is recommended for additional pain relief and chronic pain prevention.

Paravertebral Block (PVB)

PROSPECT ✓ First-choice

Targets the thoracic spinal nerves directly at the level of the surgical incision (typically T2–T6). Strongest evidence base, including reduction in chronic post-mastectomy pain when performed pre-incisionally. Can be continued via catheter postoperatively.

CoverageMost complete — multi-dermatomal

RiskPneumothorax, hypotension (higher than fascial planes)

Volume15–20 mL per level or single higher-volume injection

PECS I & II Block

PROSPECT ✓ Alternative

PECS I targets the lateral and medial pectoral nerves (between pec major/minor); PECS II adds a deeper injection (between pec minor and serratus anterior) covering the long thoracic, intercostobrachial, and intercostal nerves T2–T6.

CoverageAnterior/lateral chest wall, axilla (PECS II)

RiskLower pneumothorax risk than PVB

Volume10 mL (PECS I) + 20 mL (PECS II interfascial)

Serratus Anterior Plane Block

Comparable alternative

LA deposited deep or superficial to serratus anterior at the level of the 5th rib in the mid-axillary line. Theorised lower pneumothorax risk than PVB given superficial plane. Not in original PROSPECT recommendation but extensive subsequent evidence supports it.

CoverageLateral chest wall, axilla

Non-inferiorityNon-inferior to PVB for non-mastectomy breast surgery (RCT)

Volume20 mL unilateral / 16 mL/side bilateral

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Erector spinae plane (ESP) block has also been studied extensively for breast surgery since the PROSPECT 2020 review (which called for further research on this technique). Meta-analyses show ESP and serratus blocks provide similar analgesia to PVB and each other, though it remains unclear which fascial plane technique is definitively "best" — choice often comes down to operator experience and specific risk profile considerations (e.g. avoiding PVB-associated pneumothorax/hypotension risk in favour of a superficial alternative).

PECS Block — Technique Summary

See the full PECS I & II block page for complete anatomy and step-by-step technique. Brief summary:

PECS I — interpectoral plane
Linear probe placed below the clavicle, lateral aspect, identifying pectoralis major and minor. Inject 10 mL between the two muscles, targeting the lateral and medial pectoral nerves.
PECS II — extend deeper
From the same probe position, advance further to the plane between pectoralis minor and serratus anterior, at the level of the 3rd–4th rib. Inject 20 mL — this covers the intercostobrachial nerve and lateral cutaneous branches of intercostal nerves T2–T6, plus the long thoracic nerve.

Dosing

Component	Agent	Concentration	Volume
PECS I	Ropivacaine	0.375–0.5%	10 mL
PECS II (interfascial)	Ropivacaine	0.375%	20 mL

Which Block? — Comparative Evidence

Comparison	Finding
PECS-2 vs Serratus plane (chronic pain)	RCT found PECS-2 more effective than serratus plane block for reducing chronic post-mastectomy pain at follow-up
Serratus vs PVB (non-mastectomy breast surgery)	Non-inferiority RCT: serratus block non-inferior to PVB for acute pain/opioid consumption in non-mastectomy procedures
ESP vs Serratus (meta-analysis)	Comparable efficacy and safety; no clear superiority of either technique
PVB (overall)	Remains PROSPECT's first-choice recommendation; most extensive evidence base including chronic pain prevention

Practical takeaway: PVB remains the benchmark, particularly when chronic pain prevention is a priority (e.g. mastectomy with axillary clearance). PECS or serratus blocks are reasonable, lower-risk alternatives — particularly valuable when avoiding PVB-specific risks (pneumothorax, hypotension) is a priority, such as in ambulatory/day-case breast surgery.

Practical Analgesic Protocol

Suggested protocol for mastectomy with axillary clearance:

Suggested Protocol — Mastectomy + Axillary Clearance

PRE-OP

Paracetamol 1g PO · Celecoxib 200 mg PO · Gabapentin 300 mg PO · PVB (pre-incisional): Ropivacaine 0.5% 15–20 mL at T3–T4 level

INTRA-OP

GA · Dexamethasone 8 mg IV · Paracetamol 1g IV (if not given pre-op)

POST-OP

Paracetamol 1g QDS · Celecoxib 200 mg BD (≤5 days) · Oxycodone 5 mg PRN · Early mobilisation

Clinical Disclaimer Educational reference only — not medical advice. Verify all doses against local formulary. Individual patient assessment required by a qualified practitioner.

References

Jacobs A, Lemoine A, Joshi GP, Van de Velde M, Bonnet F; PROSPECT Working Group. PROSPECT guideline for oncological breast surgery: a systematic review and procedure-specific postoperative pain management recommendations. Anaesthesia. 2020;75(5):664–673. PMID 31984479 ↗
Fujii T, Shibata Y, Akane A, et al. A randomised controlled trial of pectoral nerve-2 (PECS 2) block vs serratus plane block for chronic pain after mastectomy. Anaesthesia. 2019;74(12):1558–1562.
Serratus anterior plane versus paravertebral nerve blocks for postoperative analgesia after non-mastectomy breast surgery: a randomized controlled non-inferiority trial. PMC. 2021. PMC8380889 ↗
Analgesic efficacy and safety of erector spinae plane block versus serratus anterior plane block in breast surgery: meta-analysis. PMC. 2024. PMC11657579 ↗
Kairaluoma PM, Bachmann MS, Rosenberg PH, Pere PJ. Preincisional paravertebral block reduces the prevalence of chronic pain after breast surgery. Anesth Analg. 2006;103(3):703–708.
Gartner R, Jensen MB, Nielsen J, Ewertz M, Kroman N, Kehlet H. Prevalence of and factors associated with persistent pain following breast cancer surgery. JAMA. 2009;302(18):1985–1992.