Sinus Histiocytosis Involving the Lacrimal Sac and Duct

To the Editor.  —In a recent issue of the Archives, Dolman et al¹ described a 17-year-old girl with unilateral epiphora secondary to sinus histiocytosis involving the lacrimal drainage system. The authors stated that their case, to the best of their knowledge, was the first example of lacrimal sac and nasolacrimal duct infiltration by this rare disorder.Two previous reports also should be considered. In 1988, Karcioglu et al² described a 15-year-old boy with sinus histiocytosis who had chronic dacryocystitis and distension of both lacrimal sacs. Involvement of the nasolacrimal drainage system was cited as the underlying reason for the obstruction. In a seminal report published in 1979 describing the ophthalmic manifestions of sinus histiocytosis in 13 patients, Foucar et al³ mentioned "increased lacrimation" as a symptom; additional details about lacrimal examinations, however, were not included.Although the report by Dolman and coworkers¹ is a valuable contribution