Mammary hamartoma is a rare benign lesion of the female breast. Diagno
sis is usually made by either radiological and or histological means.
Clinical diagnosis has been reported to be difficult. Between December
1994 and Tune 1995, three patients were found to have mammary hamarto
mas. All of them presented with breast lump greater than 6 cm in size.
All hamartomas were well-delineated, soft and lobulated. Mammogram in
these patients showed typical radiological 'breast in the breast' app
earance of mammary hamartoma. A correct clinical diagnosis of mammary
hamartoma was made in the third patient after the experience of manage
ment gained through the first two patients with mammary hamartoma. We
believe that clinical diagnosis of mammary hamartoma is possible with
both awareness of and experience of examining patients with this rare
disease.