“…According to Gutiérrez et al (2016), there is a clinical condition called quadrangular space syndrome, with neurological symptoms, vascular symptoms, weakness and hypotrophy of the deltoid and/or teres minor, however, it is rare for all symptoms to be present at the same time. In addition, there is a higher frequency of incomplete manifestations of the syndrome, producing pain on lateral rotation against resistance, with normal neurological examination and no visible hypotrophy of the deltoid muscle, therefore, this syndrome is often underdiagnosed due to its non-specific clinical features.…”