Primary malignant melanoma of the lacrimal sac
- 1Department of Ophthalmology, Tangdu Hospital, The Fourth Military Medical University of PLA, Xian, People's Republic of China
- 2Department of Pathology, Tangdu Hospital, The Fourth Military Medical University of PLA, Xian, People's Republic of China
- Correspondence to Professor Yang-Jun Li, Y-JL and S-JZ contributed equally to this paper.
Primary malignant melanoma of the lacrimal sac is extremely rare. It is usually diagnosed at an advanced stage after excision or biopsy of a tumour. We treated a 59-year-old man with tearing and bloody discharge from the right eye. Clinical examination revealed a firm, localised mass at the inner canthus consistent with a lacrimal sac swelling. Sac washout demonstrated obstruction to entry into the lacrimal sac with a reflux of blood-stained fluid. The pathological findings and the immunohistochemical studies showed a malignant melanoma of the lacrimal sac. We performed radical surgery and radiation therapy. Follow-up 4 months after surgery revealed no evidence of recurrence. Because this tumour often presents with symptoms similar to dacryocystitis and may masquerade as a chronic dacryocystitis, ophthalmologists should be aware of this disease entity when encountered with patients with epiphora and mass in the medial canthal area.
Contributors The six authors are justifiably credited with authorship, according to the authorship criteria. In detail: Conception, design, analysis and interpretation of data, drafting of the manuscript, final approval given; acquisition of data, analysis and interpretation of data, final approval given and critical revision of manuscript, final approval given.
Competing interests None.
Patient consent Obtained.