Koka Kirthi, Tongbram Andrea, Mukherjee Bipasha, Muthusamy Raman, Nambi Azhahia, Biswas Jyotirmay
Orbit, Oculoplasty, Reconstructive & Aesthetic Services, Sankara Nethralaya, Medical Research Foundation , Chennai , India.
Translational Research Platform for Veterinary Biologicals (TRPVB), Tamil Nadu Veterinary and Animal Sciences University (TANUVAS) , Chennai , India.
Orbit. 2019 Dec;38(6):503-506. doi: 10.1080/01676830.2018.1563201. Epub 2019 Jan 22.
Thelazia callipaeda is a rare parasitic infestation caused by spiruroid nematode of the genus Thelazia. We report a case of a 74-year-old gentleman who presented with a painless swelling of left lower lid since 15 days. Examination revealed a firm mobile mass along the inferior orbital rim. Magnetic Resonance Imaging showed a well-defined preseptal cystic lesion and Ultrasound screening revealed multiple mobile worms within. Patient underwent cyst excision in toto under local anesthesia. Four long refractile worms were isolated from within the cyst cavity. Species identification confirmed the parasite as Thelazia callipaeda. Periocular thelaziasis usually presents as free floating worms in the conjunctival sac, anterior chamber or vitreous cavity. It is important to be aware of this rare entity which should be considered as a differential diagnosis in endemic areas.
结膜吸吮线虫是一种由吸吮属的旋尾线虫引起的罕见寄生虫感染。我们报告一例74岁男性病例，该患者自15天前以来左眼下睑出现无痛性肿胀。检查发现沿眶下缘有一个质地硬、可活动的肿块。磁共振成像显示一个边界清晰的睑前囊性病变，超声筛查发现囊内有多个可活动的虫体。患者在局部麻醉下接受了囊肿全切术。从囊肿腔内分离出4条长的可折射虫体。物种鉴定证实该寄生虫为结膜吸吮线虫。眼周吸吮线虫病通常表现为结膜囊、前房或玻璃体腔内自由漂浮的虫体。认识到这种罕见疾病很重要，在流行地区应将其视为鉴别诊断的考虑因素。
