Recent MRI finding: A fat island or a haemangioma is seen at L4 vertebral body and a similar smaller lesion is seen in L5 vertebral body. How can you know if it is a Haemangioma & how do you know if it is growing in size ? I was told it could have been there for months or years & Dr can't differentiate between a fat island or Haemangioma. Can you help or explain what is the procedure to find out the difference please.