What causes thickness on the rib and lump in the diaphragm with a history of breast cancer?
Patient: I had breast cancer in the left breast and had radiation since then (2010) I have this nagging pulse and slight thickening on the right side under my right rib.  I am over weight, I feel a hard lump in diagphram did ultra sounds, and ct it is not my liver or gall bladder.  Sometimes it stiffens and tightens Doctor: Hi.If the CT and ultrasound is normal this lumpish feeling may be just an inflammation of the underlying ribs or muscles.That is why it stiffens and tightens .Take an anti-inflammatory and you will be fine.