Left Rib Cage Lump, It was painless and non tender and fixed to the rib anteriorly (Fig 1).

Photograph showing the swelling over the left anterior-lateral chest wall.

What is Rib Flare and How to Tell if You Have It Common causes of rib flare and tips for maintaining rib health

Tumors of the rib - ScienceDirect

Pain Under Left Rib: Symptoms, Causes, Treatment, and More

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Lump on Upper Left Side of Stomach, 7 Possible Causes

Slipping Rib Syndrome - Physiopedia

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Lump on Upper Left Side of Stomach, 7 Possible Causes