History
Since true polycoria and pseudopolycoria are so rare, there is not much history on the disorders in the tradition of modern western medicine. According to an article published in 2002, there have only been 2 cases of true polycoria since 1966.Early Chinese history names multiple legendary figures as having double pupils, which as a result was led to a beliefs that a child born two double pupils were destined to be a great king or sage. Xiang Yu, Hegemon of Chu, blood brother and later arch nemesis of Liu Bang, the founding emperor of the Han dynasty, was given great esteem due to his prowess in combat and auspicious double pupil. After overthrowing the Qin dynasty together, he was named Hegemon of the loose series of kingdoms he created in its wake, while he gave Liu Bang the remote province of Han. The Civil War that followed called the Chu-Han contention, ending with a Han victory and a legendary last stand by the Hegemon. See also
Eye injury
Iridodialysis
Monocular diplopia
Coloboma


== References ==
Areas consistent with proliferation can be found in some cysts. In rare cases, this leads to formation of a tumor, known as a proliferating trichilemmal cyst. The tumor is clinically benign, although it may display nuclear atypia, dyskeratotic cells, and mitotic figures. These features can be misleading, and a diagnosis of squamous cell carcinoma may be mistakenly rendered. Treatment
Surgical excision is required to treat a trichilemmal cyst. The method of treatment varies depending on the physicians training. Most physicians perform the procedure under local anesthetic. Others prefer a more conservative approach. This involves the use of a small punch biopsy about one-fourth the diameter of the cyst. The punch biopsy is used to enter the cyst cavity. The contents of the cyst are emptied, leaving an empty sac. As the pilar cyst wall is the thickest and most durable of the many varieties of cysts, it can be grabbed with forceps and pulled out of the small incision. This method is best performed on cysts larger than a pea that have formed a thick enough wall to be easily identified after the sac is emptied. Small cysts have thin walls, so are easily fragmented on traction. This increases the likelihood of cyst recurrence. This method often results in only a small scar, and very little if any bleeding. See also
Proliferating epidermoid cyst
List of cutaneous conditions

References


== External links ==