Causes of Pure motor neuropathy

"PHD is A TALL degree"
P= Poliomyelitis
H= Hereditary spinal muscular atrophy
D= Dapsone intoxication
A= Adult variant of Hexosaminidase deficiency
T= Tick bite paralysis
A= Acute intermittent porphyria
L= Lead intoxication
L= Lambert Eaton Syndrome
L= LMN form of Amyotrophic lateral sclerosis