[Diagnostic and therapeutic problems of dacryocystolithiasis]

An uncommon case of a woman with dacryocystolithiasis is reported with results of mineralogical investigation of the stone removed. This stone was found to consist of tricalcium phosphate following its removal by dacryocystorhinostomy. At present dacryocystolithiasis is one of the differential diagnoses of malignant tumors of the paranasal sinuses and lacrimal excretory system.