Can vomiting in a 2-year-old signal a brain tumor?

Hi doctor,

My two-year-old daughter keeps vomiting once a week literally, the last three Thursdays and counting today. She has no other symptoms and is completely acting normal outside of the vomiting. Each time she throws up once and goes on about her day. I am a little concerned because my husband's brother was diagnosed with brain cancer at five, so it runs in her family. Is this something I should be concerned about?

Please advise.

Thank you.

Hi doctor,

Thank you for your reply.

She is not bottle-feeding, and we do not force-feed. She eats a lot on her own, and she is a bit overweight. She just randomly started vomiting every Thursday. Two weeks ago in the morning, last Thursday in the afternoon, and now early this morning at midnight. Her activity is fine, and she does get constipated frequently. She also only vomits one time and then goes about her day. She went right back to a sound sleep. I am very confused. Please help.

Thank you.

Hi doctor,

Thank you for your reply.

I have been watching what we have been feeding her, and nothing really correlates to what is causing her vomit. She eats different foods each time she has vomited. An apple, a piece of pizza, and last night it was French fries. We even paused her milk intake to see if it was milk. It is the craziest thing.

Please help.

Thank you.