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Intercostal vein → Azygos → Batson vertebral plexus → infection of inner vertebral body
The internal thoracic drains into the subclavian, intercostal drains into the azygos system which is a more direct path to the vertebral drainage.
tertius is an anterior muscle and overlays the dorsum of foot as it fans out to the toes. Does not relate to the lateral malleolus.
wrong question to post on agree with above