位于肺尖部和乳腺的恶性肿瘤或者上述部位肿瘤放射治疗后常常累及臂丛神经,少数情况下,如起源于颈椎、锁骨或第一肋骨的骨肉瘤等也可以侵犯臂丛神经。但臂丛神经良性肿瘤少见。关于这类肿瘤,需要回答的重要问题包括是否为神经源性起源?如果是神经源性起源,是良性还是恶性?如果 Brachial plexus is often involved in malignant tumors of the lungs and breasts, or in the above-mentioned areas. Radiosuppression, such as osteosarcoma originating from the cervical spine, clavicle or first rib, can also invade the brachial plexus. However, benign brachial plexus tumors rare. Important questions to ask about such tumors include whether they are of neurogenic origin, benign or malignant if of neurogenic origin, and if