虹膜粘连Iris Synechia · 眼 · 特殊感觉系统 · NTP ntp-0337

Comment：
Ocular synechiae are abnormal adhesions of the iris to other ocular structures. Causes include intraocular inflammation, especially of the iris and ciliary body. Synechiae can also be sequelae of many ocular diseases, such as cataract, increased intraocular pressure, compressive or invasive intraocular neoplasms, and inflammation resulting from various causes. Anterior synechia ( Figure 1 , Figure 2 , Figure 3 , and Figure 4 ) is an adhesion of the iris to the posterior cornea due to abnormal fibrovascular tissue formation. Posterior synechia ( Figure 3 , Figure 4 , Figure 5 , and Figure 6 ) is an adhesion of the iris to the anterior lens capsule and/or vitreous due to abnormal fibrovascular tissue formation. There can also be concurrent anterior and posterior synechiae ( Figure 3 and Figure 4 ). Associated lesions include staphyloma (partial protrusion of the iris into the corneal stroma), entropion uveae (posterior inversion of the pupillary margin of the iris), occlusion of the pupil by an abnormal fibrovascular membrane, and inflammation, among others.

Recommendation：
Synechiae should be diagnosed whenever present, but should not be graded. The site modifier "iris" should be included in the diagnosis. A modifier indicating whether the synechia is anterior or posterior should also be included in the diagnosis. If both anterior and posterior synechiae are present, no modifier should be used, but it should be indicated in the pathology narrative that both are present. Associated lesions (e.g., inflammation) should be diagnosed separately.