title: Spectrum of orbital disease in South India: an aravind study of 6328 consecutive patients.
abstract: OBJECTIVE
  To review the incidence of orbital diseases in South India and to compare with other case series published.
  
  
  METHODS
  Retrospective review of 6328 consecutive patients with orbital disease evaluated at Aravind Eye Hospital between January 1997 and December 2008. The main outcome measure was incidence of orbital disease in South Indian population, as determined by clinical and histopathologic criteria. A literature review was conducted to compare the results of this study with those of previously published reports.
  
  
  RESULTS
  Of the 6328 patients, 2161 (34.1%) had inflammatory orbital disease, 1965 (31.0%) had systemic conditions involving the orbit, 1277 (20.1%) had neoplasm, 600 (9.4%) had congenital lesions, 308 (4.8%) had trauma, and 17 (0.2%) had vascular disease. Of the 2161 patients presenting with inflammatory disease, 1473 (68.1%) had idiopathic orbital inflammation, 270 (12.5%) had infection, 126 (5.8%) had dacryoadenitis, and 292 (13.5%) had other etiologies. Among the 1965 patients presenting with systemic disease involving the orbit, 1938 (98.6%) were diagnosed with thyroid orbitopathy, 22 (1.1%) with amyloidosis, and 5 (0.2%) with sarcoidosis. Of the 1277 patients with neoplasm, the tumor was vascular in 369 (28.8%), neural in 336 (26.3%), lymphoid or leukemic in 131 (10.2%), secondary neoplasm in 82 (6.4%), epithelial in 68 (5.3%), adipose in 53 (4.1%), metastatic in 39 (3.0%), and fibrous, fibro-osseous, striated muscle, histiocytic, and other cellular origin in 40 (3.1%), 37 (2.8%), 23 (1.8%), 21 (1.6%), and 78 (6.1%), respectively. Of the 600 patients with congenital lesions, 427 (71.1%) had dermoid and 170 (28.3%) had dermolipoma, followed by meningoencephalocele.
  
  
  CONCLUSIONS
  The most common causes of orbital disease in South India are inflammatory (34.1%) and systemic conditions (31.0%). With the exception of higher incidence of inflammatory etiologies, these data are largely consistent with prior published reports.
authors.affiliation: Orbit and Oculoplasty Services, Aravind Eye Hospital, Madurai, Tamil Nadu, India. usha@aravind.org
authors.forename: Usha R
authors.initials: UR
authors.lastname: Kim
authors.forename: Hadi
authors.initials: H
authors.lastname: Khazaei
authors.forename: William B
authors.initials: WB
authors.lastname: Stewart
authors.forename: Akash D
authors.initials: AD
authors.lastname: Shah
mesh_terms: D006801:Humans; D015994:Incidence; D007194:India / Q000453:epidemiology; D009916:Orbital Diseases / Q000145:classification / Q000175:diagnosis / Q000453:epidemiology*; D012189:Retrospective Studies