<s>[INST] Hi Doctor, I have got fatty. soft, palm size lump between my shoulders. It is just under the skin and moves easily. It is soft and painless and the only problem is that it is just on my spinal cord and is visible through the piece of garment I wear. Thanks for your help. [/INST] HI,Dear,Thanks for the query to HCM.1-I have studied your query in depth.2-IN my opinion,this soft mobile palm sized   lump on the spinal crest  and between the shoulders, is -Sebaceous Cyst-if it not from the childhood or birth?Dermoid Cyst-if its since childhood? or may be Lipoma -as its painless and freely mobile.3-I would advise-to see you ER- surgeon-who would do X-ray Spine and would fix the medical cause for it amongst told above. and would treat by excision /biopsy ASAP , as it hurts you that its visible out of your garments.4-Hope this would solve yoru query to your satisfaction.5-Wellcome for more queries to me On HCM.6-Thnks once again for your inquisitive query.Have a Good Day..!! </s>