[Unilateral gigantomastia of pregnancy: case-report of a giant breast hamartoma].

Breast hamartoma is a benign tumour consisting of fat, fibrous and glandular tissue. A young woman in her 19th week of pregnancy underwent exceptional surgery for a unilateral gigantomastia secondary to a rapid-growth giant hamartoma during her second pregnancy. Rigourous clinical and ultrasonographic examinations were performed followed by multiple biopsies. The decision to perform surgery was guided by the risk to skin integrity and of tumour infarct. Our report provides detailed information on gestational benign breast tumours, on the specificities of medical imaging and breast surgery in pregnant patients.