One or two deltopectoral lymph nodes (or infraclavicular nodes) are found beside the cephalic vein, between the pectoralis major and deltoideus, immediately below the clavicle.
They are situated in the course of the external collecting trunks of the arm.
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References
This article incorporates text in the public domain from page 699 of the 20th edition of Gray's Anatomy (1918)
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