Today I went to a surgeon for removal of what was thought to be a Lipoma from the area right under my right collar bone. When the surgeon got in, he determined that it was NOT a lipoma, but instead- it was possibly a non benign ganglion cyst . He removed it as best he could and it is being biopsied this week. My question is three part? Are the symptoms of a lipoma and a ganglion cyst fairly consistent? Why would this cyst not have been diagnosed by one of the three tests (x ray, ultrasound and MRI)? Is it uncommon to find a ganglion cyst in the aforementioned location?