Case: We present a case of a 30-year-old man with severe ulnar nerve neuropraxia and first dorsal interosseous muscle wasting. Intraoperatively, a large venous plexus compressing the terminal division of the deep motor branch of the ulnar nerve was identified as a contributing factor. Conclusion: This is the first documented instance of compression of the terminal branch of the ulnar nerve caused by a venous plexus, resulting in neurapraxia. This rare anatomical variant caused progressive functional impairment and was successfully treated with ligation of vessels distally along with proximal and distal nerve decompression.
Pluta et al. (Wed,) studied this question.