Linear guide                                                             Anatomical guide                                                             Anatomical limit                                                             Place of incision A. posterior to the medial border of the coracobrachialis muscle   B. begins at the lateral border of the first rib and terminates at the inferior border of the tendon of the teres major muscle   C. along the anterior margin of the hairline of the axilla D. through center of the base of axillary space and parallel to long axis of the upper extremity when abducted (middle of the armpit)

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