JK Chung, et al. SUDORIFEROUS CYST ACCOMPAINED WITH ESOTROPIA rim and floor by use of CT and MRI. In this case, the CT and the MRI showed that the cyst compressed the eyeball and displaced the globe, and allowed for the rectus muscle to be found. We believe that the CT and the MRI were helpful to evaluate the status between the cyst mass and the healthy surrounding tissues and aided in making decisions about the time to operate although neither the CT nor the MRI was helpful for the differential diagnosis. The management of apocrine gland cysts is usually a simple observation if the lesion is small and asymptomatic, but occasionally requires complete local excision if the lesion is symptomatic or cosmetically unacceptable.1 In past reports, Saunders4 had excised a congenital sudoriferous cyst from an 18 months old and Mims et al3 have operated on a 24 month old. In these previous reported cases, there were no complications, such as encroachment upon the visual axis, an increase in the size, or inflammation. On the other hand, Rosen and Li8 had excised the mass and reconstructed the orbital rim with a calvarial bone graft in a 45-year-old woman who presented with a painless lump in her left lower eyelid. The histopathology of this report lesion had features typical of a sudoriferous cyst. Grossly, it had a thin wall and contained clear fluid. Microscopically, the lesion was a solitary cyst lined by two layers of non-keratinizing cuboidal epithelial cells with apical snouts on the luminal side of the cell. The cyst was periodic acid-Schiff (PAS)-positive, with diastase-resistant granules on their apical surface, similar to what has been previous reported.8,9 In this case, the radiologic appearance, the clinical features, and the histopathologic results of the cyst were compatible with the diagnosis of a sudoriferous cyst. We recommend that if a congenital orbital cyst affects the globe or the extra-ocular muscles, one should excise the mass as early as possible and regularly follow up and evaluate for strabismus and amblyopia. References 1. Shields JA, Shields CL. Orbital cyst of childhood- classification, clinical features, and management. Surv of Ophtjalmol 2004;49:281-99. 2. Allington HV, Allington JH. Eyelid tumors. Arch Dermatol 1968;97:50-65. 3. Mims J, Rodrigues M, Calhoun J. Sudoriferous cyst of the orbit. Can J Ophthalmol 1977;12:155-6. 4. Saunders JF. Congenital sudoriferous cyst of the orbit. Arch Ophthalmol 1973;89:205-6. 5. O'Brain CS, Braley AE. Common tumors of the eyelids. JAMA 1936;107:933. 6. Reese AB. Discussion of "Common tumors of the eyelids". JAMA 1936;107:937. 7. Doxanas MT, Green WR, Arentsen JJ, Elsas FJ. Lid lesions of childhood: a histopathologic survey at the Wilmer Institute (1923~1974). J Pediat Ophthalmol 1976;13:7-39. 8. Rosen WJ, Li Y. Sudoriferous cyst of the orbit. Ophthal Plast Reconstr Surg 2001;17:73-5. 9. Spencer WH. Ophthalmic pathology: an atlas and textbook, 3rd ed. Vol. 3. Philadelphia: WB Saunders, 1986;2254-6 123