A 25-year-old lady presents with spontaneous nipple discharge of 3-months duration. On examination, the discharge is bloody and from a single duct. The following statements about management of this patient are true except -
Ultrasound can be a useful investigation Radical duct excision is the operation of choice Galactogram, though useful, is not essential Majority of blood-stained-nipple discharges are due to Papillomas or other benign condition