Can you give us any guidance for the above referenced situation? My 16 year old daughter was diagnosed with mono (positive for the EB Virus) in May 2008. She had an initial ultra sound and blood work to confirm. Since that initial diagnosis, she has swelling underneath the left bottom rib cage with varying degrees of pain. Because of the swelling and pain, she has had 2 ct scans both negative for any abnormality of the spleen! (One as a follow up to the mono, the other in the ER after severe pain and swelling under the rib cage). She has seen a pulmonary specialist as the doctor suggested subcutaneous emphesyma. (She has allergy and exercise induced asthma). Chest x-rays were done and that was ruled out. Nothing suspicious on the x-rays. She has had blood workups done three times and there were no abnormalities in the second two. The first one diagnosed the mono, the 2nd to follow up, the third in the ER. She is still having extreme pain, especially after exercising. Everyon