hi,i have recently found a lump on the left side of my ribcage it is above my breast and on the second rib bone down ,it is the size of a walnut,not painful at al ,feels solid as tho its part of my bone,it does not move an you can easily see it sticking out through my skin,im always tired and sufer with terrible backache,my nan passed away when she was 36,due to bone cancer,im 27