Final answer:
In a medical context, circumferential comparisons between arms are used for diagnosing conditions like lymphedema. Reference points such as the lateral border of the scapula or the lateral circumflex artery could be used during these assessments.
Step-by-step explanation:
The section that allows circumferential comparisons between arms likely refers to a medical examination or assessment wherein measurements of the arms are taken to compare and detect differences in size or structure. Such comparisons may be critical in diagnosing conditions that lead to asymmetry between limbs, such as lymphedema or muscle hypertrophy. In this context, health professionals might examine the lateral border of the scapula or assess blood flow using an artery like the lateral circumflex artery. These anatomical landmarks could be reference points for ensuring accurate and consistent circumferential measurements.