My baby is 18 months old... Frm last two months she is occasionally showing her right knee again and again... And crying...i think she is having knee pain...I took her to 2 3 pediatrician all said it can either growing pain or transient synovitis. ... But two days back in noticed whenever I bend her legs some bone like structure comes out at knee portion...but when i open her legs there is nothing....this dsnt happen with left knee ....I am worried...today she was also complaining of knee pain... Holding her right knee and crying...this happens fr few mins and goes back to normal..she is crawling cruising well...I pressed her knee it dsnt hurt...she moves her legs well... Attached here is the pic of same...may be u will get it... Is it normal bone or she is having any issue with knee ... Plzzz reply docs...