The final stage of syphilis, following a latent period that may last years, characterized by spread of the disease to many organs and tissues, including the skin, bones, joints, heart, brain, and spinal cord.第三期梅毒：在一个有可能长至数年的潜伏期结束后到来、以疾病向许多器官和组织包括皮肤、骨骼、关节、心脏、大脑和脊髓的扩散为特征的梅毒晚期