本征是指因肺尖部肿瘤的浸润、压迫而引起上肢的顽固性疼痛和同侧的Horner氏综合病征的一组病征。1924年,pancoast首先提出,目前仍习惯称本征为Pancoast氏 Intrinsic refers to a set of signs of intractable pain in the upper extremities due to infiltration and compression of the apical tumor and ipsilateral Horner’s syndrome. In 1924, pancoast first proposed that it is still customary to call the intrinsic Pancoast’s