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Table 1 Clinical and neurophysiological findings of previous case reports which describe syringomyelia presenting as foot drop

From: Chiari malformation type 1 presenting as unilateral progressive foot drop: a case report and review of literature

  Panda AK et al. [8] Saifudheen K et al. [9] McMillan HJ et al. [10] Narry Muhn et al. [11] Ilya Laufer et al. (Case 2) [12] Patient described in this case report
Case 1 Case 2
Age at presentation (years) 16 14 5 4.5 5.5 9 6
Main complaint Rapidly progressive right sided foot drop for 2 months Rapidly progressive bilateral foot drop for 1 week Left foot drop for 2 months Abrupt onset right foot drop Rapidly progressive left foot drop Right foot weakness for 1 month Rapidly progressive left foot drop for 1 month
Muscle power (Affected limb) Out of 5 Hip Flexors 5 N/C 5 N/C Normal 5 5
Extensors 5 N/C 5 N/C Normal 5 5
Ankle Dorsi-flexion 0 N/C 0 1 Weak 5 0
Plantar flexion 3 N/C 4+ N/C Normal 2 3
Reflex Knee Diminished Diminished Normal Absent Absent Absent Diminished
Ankle Absent Diminished Absent Absent Diminished Diminished Absent
Nerve conduction Common fibular nerve Latency 3 mV Normal 4.2 mV 5.4 mV Normal N/C 2.8 mV
Amplitude 2.6 ms Low 1.5 ms 2.6 ms low N/C 3.3 ms
Velocity 43.1 m/s Normal 44 m/s 45 m/s Normal N/C 59 m/s
Tibial nerve Normal Normal Normal Normal Normal N/C Normal
Electromyography Fibrillation waves in right TA, PL, MG, GM Fibrillation waves in TA, MG Fibrillation waves in right TA, PL, MG, GM Active denervation of TA Fibrillation waves in TA, TP, MG N/C Fibrillation waves in left TA. Left MG was Normal
  1. Note: TA Tibialis Anterior, PL Peronius Longus, MG Medial Gastrocnemius, GM Gluteus Medius, TP Tibialis Posterior, N/C Not Commented