1·If the ostium of sinus were traumatized, it might become an etiologic factor of chronic sinusitis.
若伤口波及鼻窦开口，将导致慢性鼻窦炎的形成。
2·Conclusion (1) Intestinal vascular malformation was the most common etiologic factor and should be paid attention to.
结论(1)肠道血管畸形已成为下消化道出血的主要原因，值得重视。
3·Conclusion: We could not identify a single etiologic factor responsible for the lesion in the splenium of the corpus callosum.
结论：我们无法确定胼胝体压部的病灶是由一个单一的病因所致。
4·Objective: to discuss the evolution of hyperthyroidism under different iodine circumstances, and give a summary of transition, such as etiologic factor and methods of diagnosis and treatment.
目的：探讨在各个历史时期不同的碘环境下甲状腺功能亢进(甲亢)的演变趋向，总结其原发疾病及诊断治疗手段的变迁。