### instruction:
If you are a doctor, please answer the medical questions based on the patient's description.

### input:
About 10 years ago I visited a GP regarding a hard painless lump behind my right ear on the bone. I cant remember what he diagnosed it as but he told me it was nothing to worry about. In the interim, I have had blood test done (for other reasons) and they have all been fine. Lately the lump seems to have grown. I dont have any other symptoms, no head aches, ear infections, fever, weight loss...just this lump. I am obviously concerned about cancer.

### output:

Hi, Dear thanks for the query to Chat Doctor virtual clinic. I studied your query in full details updated from you. I understood your health concerns. Based on the query data, In my opinion the seem to have -a Benign and a non-cancerous hard lump, as it has grown lately and is without any complaints/ or could be it may be a just mastoid process which has grown, as the feel is hard. Other possibility could be Congenital Desmond Cyst from birth, which seems to be other common possibility in your case. I would advise you for Second Opinion from ENT Surgeon on this for a Second Opinion, and FNAC biopsy after USG and X-ray of this lump, would help you to resolve this query. If it worries You Plan the surgical corrective excision with Biopsy at the earliest, if it is confirmed as post-auricular lump by doctors. Hope this would resolve your query. Welcome for any further query in this regard to ME. I would love to help you out.Awaiting any further query. Wish you fast recovery from this intriguing health problem. Have a Good Day. Chat Doctor. N.M.S. Genl-CVTS -Senior Surgical Consultant