I recently had a patient encounter that threw me for quite the loop. While precepting for my residents, we encountered a patient who had a mysterious lump the size of a golf ball inside her armpit. I wasn’t surprised the resident had been stumped, as I too felt lost for a while after running through a series of questions. Of course, patience prevailed and we eventually figured out what was going on, and I’m happy to say the patient has recovered and is doing well!