You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is BRAF V600E mutationsare seen in all of the following except and explain in detail?
BRAF V600E (valine converting to glutamate at 600thposition)is seen in the following cancers

Langerhan’s cell histiocytosis
Hairy cell leukemia
Malignant melanoma
Pilocytic astrocytoma (WHO Grade I astrocytoma)
Ovarian carcinoma
Endometrial carcinoma
Colorectal carcinoma
Papillary carcinoma thyroid
Erdheim Chester disease