116. Atypical AIDP with predominantly sensory involvement and increased duration of SAPs

The diagnosis of AIDP is based on clinical, electrophysiologic, and CSF data. Increased duration of cMAPs has been recently considered in the diagnosis of CIDP. However, the contribute of sensory neurography has not been well characterized. We describe a case of a 26 years old woman who came to our attention for oral and upper limb tingling which occurred ten days after flu-like symptoms and progressively extended to lower limbs. A first EMG revealed an increased distal latency of motor nerves and interestingly, a significantly increased duration (total and negative) of SAPs of median and ulnar nerves bilaterally. At admission, neurological examination revealed diffuse hypopallestesia in the extremities and absence of OT reflexes in lower limbs. CSF examination revealed a mild hyperproteinorrachia (0,74 g/l, normal value