cafe au lait spots

Recently i was diagnosed with a grade 2 astrocytoma my neuro-oncologist asked me if I had any relatives with any cafe au lait spots. AT the time I couldn't think but my 5 yr old has 5 and a freckle under his arm. My two year old has one on his butt cheek and a freckle on his penis and another freckle on his lower abdomen areas not exposed to the sun. My five year old has complained of ankle pain for over a year. Has always been extremely smart but has started having short term memory problems and attention problems.He also complains of stomach aches and can't concentrate. I am worried he has signs of neurofibromatosis. But I do not have a clue where to start our pediatrician just blows everything off.The spots on his arms and hands are several inches large.