Pain below left rib. feels like a firm, swollen area that s sore to rub. Have recently been hospitalized for low RBC of 6.6. Was given 2 units of blood. Next norning it came up to 7.6. I was given a large iron iv injection, followed with 3 iron pills a day. by day 2 it was up to 8.0 when I was released. While in hospital, I received an Endoscopy which did not indicate bleed however it was gastric, & had a medium sized hernia at the top of my stomach. the pain under lower left rib has been over the last 2 days, and some serious stomach pains in the upper portion. Last Sun-Mon I experienced brown urine, which by today had cleared up. I ve never experienced that before.My Dr today was wondering if I might have an enlarged spline, with my explain my blood loss. Can you t ell me the functions of the spline, what an enlarged one can be caused from & how it would produce blood loss, that would show up in my stool?