Acute mononeuropathy in a child with newly diagnosed type 1 diabetes mellitus.
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BACKGROUND
Neuropathy is a frequent complication of diabetes mellitus (DM), increasing with the duration of the disease, poor glycemic control and advanced age. Acute presentation of a neuropathy in the setting of a newly diagnosed type 1 DM is rare and holds a diagnostic challenge.
METHODS
A 10-year-old girl, presented at the emergency service with complaints of polydipsia, polyuria, asthenia and weight lost over the last 15 days, accompanied by difficulties in flexing the right foot, during the previous week. The patient denied any pain, paresthesias, or altered sensibility. There was no fever documented, or recent infectious intercurrence or trauma. On physical examination, she was conscious, collaborative and space and time-orientated, had a diminished strength in the right foot, namely in the dorsiflexion, conditioning a steppage gait ipsilateral. Hyperalgesia was felt in the dorsum of the right feet to the ankle. DM type 1 was diagnosed based on serum glucose of 629 mg/dL and mild ketoacidosis. Investigation for infectious, immune and nutritional aetiologies for the mononeuropathy was negative. Electrophysiological study was suggestive of a lesion of the peroneal nerve on the popliteal cesspit, but was not conclusive. The patient started physiotherapy during her hospital stay and exhibited a slight improvement in the dorsiflexion of the foot. Four months later she was asymptomatic and with good glycaemic control.
CONCLUSIONS
Diabetic neuropathy is a heterogeneous group that still lacks adequate comprehension. Its approach is empirical and demands exclusion of other etiologies. A definitive diagnosis is not always possible and sometimes is retrospective.
