Topic Overview

Mnemonics – Pectoral Region

1. Walls of Axilla

👉 “A Major Minor SubLat Serrat Humerus”

• Anterior wall → Pectoralis Major, Pectoralis Minor

• Posterior wall → Subscapularis, Latissimus dorsi, Teres major

• Medial wall → Serratus anterior (with ribs)

• Lateral wall → Humerus (intertubercular sulcus)

2. Branches of Axillary Artery (1-2-3 Rule)

👉 “Screw The Lawyer, Save A Patient”

• 1st part → Superior thoracic

• 2nd part → Thoracoacromial, Lateral thoracic

• 3rd part → Subscapular, Anterior circumflex humeral, Posterior circumflex humeral

3. Branches of Thoracoacromial Artery

👉 “CAD-P”

• Clavicular

• Acromial

• Deltoid

• Pectoral

4. Axillary Lymph Node Groups

👉 “People Have Small Cute Arms”

• Pectoral (anterior)

• Humeral (lateral)

• Subscapular (posterior)

• Central

• Apical

5. Nerve Supply of Pectoralis Major

👉 “Major has Two Bosses”

• Supplied by both Medial and Lateral pectoral nerves.

6. Root Value of Long Thoracic Nerve

👉 “C5,6,7 keep the Wings to Heaven”

• Injury → winged scapula (serratus anterior paralysis).

7. Quadrants of Breast (for carcinoma site)

👉 “Upper Outer is the Winner”

• Upper outer quadrant → most common site of carcinoma.

8. Venous Drainage of Breast

👉 “AIM”

• Axillary vein

• Internal thoracic vein

• Most posterior intercostal veins

9. Clinical Signs of Carcinoma Breast

👉 “DRaPe”

• Dimpling of skin

• Retraction of nipple

• Peau d’orange

• enlarged axillary nodes