High-resolution ultrasound of the posterior femoral cutaneous nerve: visualization and initial experience with XXXX .

@entity1 @entity2096 @entity2101 @entity158
OBJECTIVE: The posterior femoral cutaneous nerve (PFCN) is a sensory nerve originating from the sacral plexus. @entity2096 leads to @entity158 within the inferior gluteal region and the posterior aspect of the thigh. As electrophysiological assessment is challenging, diagnosis of @entity2096 has been, thus far, primarily based on clinical findings, which can result in misdiagnosis. Therefore, alternative confirmatory assessments such as an imaging modality that could aid in the diagnosis of @entity2096 would be desirable. The purpose of this study was to determine the feasibility of visualization of the PFCN with @entity2101 ( @entity2101 ) and to test this technique in our clinical routine. MATERIALS AND METHODS: The study consisted of two parts. In the first part, @entity2101 -guided perineural ink injections along the course of the PFCN were performed at the posterior aspect of the thigh in 26 lower limbs of 14 fresh non-embalmed cadavers. Subsequent dissection confirmed correct identification of the nerve. In the second part, @entity1 with a suspected @entity2096 were examined and a selective @entity2101 -guided nerve block was performed to verify the suspected diagnosis. RESULTS: The PFCN was correctly identified with @entity2101 in 96.2  % (25/26) of cadavers. Further, six @entity1 with a suspected lesion of the PFCN were examined, and the diagnosis was proven by successful @entity2101 -guided block in all cases. CONCLUSION: We confirmed the reliable visualization of the PFCN using @entity2101 . This offers a new technique for the assessment of the PFCN, which could also be demonstrated with the case series presented.
