As per available information-History and MRI reports, It looks like your thickening of attachment of muscles of thigh. This muscle is used during walking activities.Hence. whenever it is used for long period, pain arises. One need to know reason for thickening and scarring,which could by due to previous trauma,surgery,infection or inflammation at the affected part.
Next Steps
Detailed evaluation with elaborate history and physical examinations and targeted investigations
Health Tips
Physiotherapy under supervision following examination and other relevant investigations