Primary palmar hyperhidrosis presenting with unilateral symptoms: a report of two cases and review of the literature.

Two cases of primary palmar hyperhidrosis are presented. T2-T3 sympathetic ganglionectomy of the affected side completely alleviated perspiration of the palms, but oversweating of the contralateral palms appeared a few weeks later. A similar sympathetic ganglionectomy of the second side, 1 month and 1 year later, resulted in renewed oversweating of the palm on the first operated side within 3 months of the second operation. During the same period, 127 other patients with primary palmar hyperhidrosis underwent a bilateral upper dorsal sympathectomy, though the condition did not recur in any of these patients. The possible mechanism(s) of why overperspiration of the second hand developed after the first sympathectomy in these two patients, and why it recurred in the first hand after the second operation are examined, but remain obscure.