A 10-year-old boy complains balanced undramatic about back pain, which had suddenly occurred without trauma, training, fight, starting at the top, descending to the sacrum. Ibuprofen up to 4x tgl, without its effect. Clinically located approximately on 4 days a movement pain in all directions, pressure pain all Spinous processes and paraspinal muscles including trapezius muscle myogelosis about TH 3-6 right.

Laboratory tests no signs of inflammation. Has anyone an idea for further diagnosis?