title: Orbital melanoma with calcification: A diagnostic dilemma.
abstract: Primary orbital melanoma is rare and has varied initial presentation. A 28-year-old female presented with proptosis and decreased vision in the left eye. Computed tomography scan showed an orbital mass with contrast enhancement and calcification around the optic nerve leading to a diagnosis of meningioma. The patient chose to be on observation. Loss of vision with an increase in proptosis was seen at 6 months follow-up. On surgical exploration, a well-defined pigmented mass was seen encasing the optic nerve. Histopathological analysis revealed a malignant melanoma. Metastatic workup was negative. Left eye lid sparing exenteration was done. A high index of suspicion is necessary in a rapidly growing suspected optic nerve sheath meningioma and a differential diagnosis including orbital melanoma be considered.
authors.affiliation: Department of Orbit, Oculoplasty and Ocular Oncology, Aravind Eye Hospitals and Postgraduate Institute of Ophthalmology, Madurai, Tamil Nadu, India.
authors.forename: Sukhdeep
authors.initials: S
authors.lastname: Bains
authors.affiliation: Department of Orbit, Oculoplasty and Ocular Oncology, Aravind Eye Hospitals and Postgraduate Institute of Ophthalmology, Madurai, Tamil Nadu, India.
authors.forename: Usha
authors.initials: U
authors.lastname: Kim
authors.affiliation: Department of Pathology, Aravind Eye Hospitals and Postgraduate Institute of Ophthalmology, Madurai, Tamil Nadu, India.
authors.forename: R
authors.initials: R
authors.lastname: Shanti
mesh_terms: D000328:Adult; D002114:Calcinosis / Q000175:diagnosis*; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008545:Melanoma / Q000175:diagnosis*; D009915:Orbit / Q000000981:diagnostic imaging*; D009918:Orbital Neoplasms / Q000175:diagnosis*; D014057:Tomography, X-Ray Computed