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Table 1 Clinical Data on 9 operated patients

From: Anatomical, Clinical and Electrical Observations in Piriformis Syndrome

Patient 1 2 3 4 5 6 7 8 9
Sex M f m f f m m f f
Age(years) 32 32 58 23 44 15 39 15 65
Weight(kg) 70 60 99 58 57 110 76 55 80
Side L L L R L R R R R
Sport - - Football Walker Swim football Walker Walker -
Gluteal trauma - - - - - yes - - -
Preop. Steroid injection 0 1 3 0 2 0 0 0 0
Delay to surgery (years) 3 7 3 4 2 3 6 2 19
Sciatica yes yes yes Drop foot yes yes yes yes yes
Pain on sitting position + + + + + + + + +
Gluteal atrophy - - - + - - + + +
Pain on digital pressure + + + + + + + + +
H-reflex peroneal nerve + + + + +   +   +
Preop.MRI (spine) 1 1 4 7 3 1 3 2 1
Preop.MRI (pelvis) Veinous sign Piriformis hypertrophy   Veinous sign Veinous sign Piriformis hypertrophy Veinous sign   Normal
From surgery to pain relief One year 6 months 3 months 2 weeks No relief 1 year 1 year 4 months 1 month
Residual gluteal pain - + - - + - - - +
Functional result Excellent Good Excellent Excellent Bad Excellent Excellent Excellent good
  1. The preoperative and last followup evaluation concerning the clinical status and the results of the MRI images and the H-reflex of the peroneal nerve.