Lacrimal sac melanoma.

A 48-year-old woman presented with a 5-month history of unilateral epiphora and progressive growth of a left-sided medial canthus mass. CT revealed a nonenhancing soft tissue mass of the left lacrimal sac with widening and erosion of the nasolacrimal canal. The tumor was resected and pathologically confirmed to be malignant melanoma.

Bilateral eyelid edema and orbital cellulitis associated with Pott's puffy tumor.

Pott's puffy tumor is rarely associated with orbital cellulitis. We describe a pediatric patient with Pott's puffy tumor and right-sided orbital cellulitis. He underwent urgent surgical drainage of a glabellar subperiosteal abscess and completed a six week course of intravenous antibiotics with complete resolution of infection and no long-term sequelae.

Spasm of the near reflex in a patient with multiple sclerosis.

A 33-year-old woman with a history of relapsing-remitting multiple sclerosis presented with complaints of episodic horizontal diplopia and blurred vision over the past two months. The patient gave a past history of similar episodes of diplopia that had occurred with previous clinical relapses of her multiple sclerosis. On eye movement examination, the patient exhibited intermittent spasms of convergence coupled with miosis.