We report the case of a right-handed 67-year-old uremic woman with severe left carpal tunnel syndrome (CTS) in whom preoperative neurophysiologic data suggested that the thenar motor branch (TMB) of the median nerve ran an anomalous course that was confirmed during surgical release. The patient had undergone periodic hemodialysis for 10 years through a vascular graft at the left forearm. The pa...

Figure 1. Volar incision of forearm incorporating a carpal tunnel release. Figure 2. Incisions for the release of the thenar (T) and hypothenar (H) compartments.

Unlike carpal tunnel syndrome, isolated neuropathy of the recurrent motor branch of the median nerve is a rare condition as a cause of thenar muscle wasting. A focused neurophysiological approach is mandatory to reach the proper diagnosis and start specific treatment early enough to prevent possible irreversible hand function disabilities. This is a description of 16-year-old female patient who...