Iñiguez Alemán, Juan ManuelHermida Cordova, Hernan Arturo2022-02-012022-02-01202100283746http://dspace.ucuenca.edu.ec/handle/123456789/37919https://www.scopus.com/record/display.uri?eid=2-s2.0-85116108732&doi=10.35366%2f100994&origin=inward&txGid=fd1f30e1c533b2ec7ba110bdcee46701The cervical rib can be a rare finding in asymptomatic subjects. When it produces compression, it affects variably the vasculonervous structures of the brachial plexus; the clinical is progressive, related to movement; diagnosis is by exclusion, imaging studies indicate the site of osteo-neuro-vascular conflict and electrophysiological studies indicate the degree of neural involvement. Next, we present a young male patient with an eight-month history of paresis and right dysesthesias, with an image of bilateral cervical ribs with different anatomical characteristics; this case discusses how a variant of the anatomy produces pathology and when it is not related to compression.es-ESBrachial plexusThoracic outletRib cervical