Hiperplasia estromal seudoangiomatosa. Una lesión de la mama infrecuente y de presentación variable

Pseudoangiomatous stromal hyperplasia is a rare benign mammary lesion. It is characterised by an overgrowth of fibrous connective tissue that produces numerous spaces resembling vascular structures. This lesion usually affects women of reproductive age but has been described in patients aged between 12 and 75 years. It may appear as an incidental finding in histological analysis after surgery for benign or malignant disease, either as a painless breast tumour, simulating a fibroadenoma, or as a gigantomastia or deformity that becomes more evident on comparison with the contralateral breast. Percutaneous ultrasound-guided biopsy allows definitive identification of the type of lesion and exclusion of malignant disease, such as low-grade angiosarcoma. Treatment is surgical and includes both surgical removal of the lesion and mastectomy with prosthetic reconstruction. We describe a series of three cases with different clinical presentations and treatment. The first case was a radiological and histopathological finding related to a breast deformity and asymmetry, while the remaining two cases presented as a palpable, single and painless breast tumour.