Breast terminal duct epithelium which assumes a columnar morphologic appearance has been recognized for decades, and has been referred to by a variety of names, including abnormal involution, cystic ...

LITTLE attention has been paid to polypoid epithelial tumors of the bile ducts in spite of their favorable prognosis, often disabling symptoms, difficulty of clinical recognition and relation to ...

Although metaplastic changes can occur in the extrahepatic bile ducts, a detailed morphologic study of these lesions has not been done. We examined the bile duct mucosa in 42 pancreaticoduodenectomy ...