- Bonafide cysts of the lacrimal sac are rare, with only a few reports in the literature.1–3 Most are probably congenital in origin while others may be acquired. The epithelial lining of these cysts can be squamous or ciliated-respiratory in type, depending on the region of the sac lining that spawns the lesion. Conjunctival cysts arising from the medial regions of the forniceal conjunctiva must be distinguished from cysts deriving from the lacrimal sac. Other cyst-like conditions may be formed by closure of a dacryocystocele as a result of trauma or inflammation.
- Pleomorphic adenoma is a neoplasm named for its mixture of disparate tissue elements, including branching double-layered ductules within a fibroid, myxoid, cartilaginoid, and (rarely) adipocytic stroma.1 A rare cutaneous tumour presumably arising from apocrine or eccrine sweat ducts, it has been described in the eyelid, where it may occupy various locations, including the sub-brow region.1,2 Well-recognized tumours with identical histology may arise from the ductules of the major salivary glands and all portions of the lacrimal gland.
- Natural killer T-cell lymphoma (NKTL) is an uncommon form of systemic lymphoma that derives from natural killer (NK) cells or cytotoxic T lymphocytes, or both. Although nasal or paranasal sinuses are characteristically involved, occurrence within the ocular adnexa is rare where B-cell lymphomas predominate.1 We report an NKTL that was initially confined to a lower eyelid, mimicking a follicular conjunctivitis.