Chiari-Frommel syndrome is a late complication of pregnancy and breastfeeding, usually caused by a tumour in the hormone controlling pituitary gland (situated under the brain), but there are other rare causes. The menstrual periods of affected women fail to restart after breastfeeding has finished and they cannot stop their production of breast milk. Blood tests show abnormal hormone production by the pituitary gland, and a CT or MRI scan reveals the pituitary tumour. Surgery to remove the pituitary tumour is usually very successful.
(Last modified: 22nd Oct 2014)