Refrain from back use short term when patient resumes use a back with a frame and hip belt as this will reduce incidence of backpack palsy 
Surgical consultation (nonemergent, generally)
Physical therapy / occupational therapy
Rucksack paralysis
Parsonage-Turner syndrome
Tick paralysis
Toxic neuropathy
Meralgia paresthetica
Progressive neuropathy secondary to exposure 
Horner syndrome
See weakness, numbness