Brief Answer: you are having sacroillitis Detailed Answer: Hello, I have read your question in detail and I will try to be as simple as possible in my answer. Also you are free to answer any followup question if you think that i missed some thing or you are not getting some points. So i will start now. 1. Your sacroilliac joint, which is present at lower back, just behind hip is showing some water collection in bone. This means there is some disease activity going on. Although it is very little, so you may not feel direct pain or any pain on pressing on your back but your thigh pain can be due to this fluid. 2.Your thigh muscles are showing fat deposition, that means your thigh muscles are getting weaker and at the place of muscle tissue there is fat. So if you stand for long time, you may feel tired a little. 3.There is sclerosis at SI joint means there is some sign of your old AS as well. And i can assure you this does not mean tumor. Whenever above mentioned fluid in joint get dried up it become little sclerotic on MRI. So its kind of change which shows that a healed disease is there. 4. Hamstring tendinosis is pain and swelling in muscles of back thigh. This can happen during playing any sport, doing yoga and doing any activity which put strain on thigh muscles. .So this explains your deep pain in thigh . 5.Your hip joints are normal, there is no water, or calcium deposition or loss of blood flow in hip joints. They are in very good condition. 6. Atrophy of tensor XXXXXXX muscles again mean that your thigh muscles are getting weaker. So if I summaries all MRI finding it means that there is some weakness of your thigh muscles, and there is some fluid in your SI joint. So there is nothing very serious or alarming about it. There is no tumor or any such thing which can become a serious issue in future. These findings are reported even in some normal person as well. I would like you to suggest that for time being do not do any yoga exercise as it may cause thigh muscle strain. Take protein in diet like egg, fish, chicken. For pain relief you can take either Amytryptalin and tramadol after consulting with doctor. Also apply warm water over thigh( you can sit in a tub) when you are taking bath. It will reduce your pain. Taking calcium and vitamin D also makes muscle healthy. I hope I had answer all your queries. Feel free to question any thing else. Thanks for giving me this opportunity and take care.

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Brief Answer: physio will help Detailed Answer: hello, i can understand your concern. Medical terms are bit confusing. Let me try to solve your queries. 1. When i say heal AS , I mean sclerosis suggest that disease in bone is not active, but in other part it can be in active state as it is multi system disorder. There are blood investigation like ESR which tells about disease activity in body. AS can not be completely cured, best we can do is to suppress the disease activity so it no longer affect muscles in body. This is called remission. Sclerosis is suggestive of remission of AS in your si joint. 2. Dormant TB is when disease is not active and it does not need any treatment. 3. Your bladder problem and your thigh muscle wasting can be due to nerve compression at back. I would like to get MRI of your spine if there is any nerve compression. 4.Yes, physiotherapy will help but first we get MRI to see extent of nerve compression . 5.Your MRI does not suggest that any contrast was used. Also there is no need of contrast if we are looking for SI joint or spine. 6.You can post your MRI spine report to Us also. If there is any nerve compression an orthopaedic surgeon will be able to help you. 6. In your age at least one gram of calcium should be taken. Thanks for asking followup questions. It was my privilege to help you. Let me know if i can help you any further.

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