This case is recorded because of the rarity of the condition and because it showed a feature which has not to our knowledge been noted in cases hitherto reported, namely, the association of chyluria with menstruation. REPORT OF CASE The patient, a married woman, aged 28, of British nationality, first came to our attention in November, 1931, when her husband (a doctor) sought our advice because she was passing milky urine. It soon became apparent that the condition was chyluria. We interviewed the patient and obtained the following history: Except for the common ailments of childhood she had always enjoyed excellent health. Normal menstruation commenced just before the age of 13; it was always normal. At 16, the patient began to pass milky urine for the first time; this was ascribed to a chill after bathing. For about six months the urine was almost always milky, and then, without special