Pathology - Radial scar

Pathology - Radial scar
Definition • A benign sclerosing breast lesion distinguished by a central area of scarring encircled by a radiating margin of proliferative glandular tissue. Radial scars vary in size from minuscule microscopic lesions to bigger, clinically discernible masses. Lesions above 1 cm in size are occasionally referred to as 'complex sclerosing lesions.'

Epidemiology • Radial scars are rather prevalent lesions. • Incidence rates fluctuate significantly based on their definition.

The aetiology and pathophysiology of radial scars remain mostly unknown. One concept posits that they signify a reparative process in reaction to regions of tissue injury in the breast.

Presentation • Large radial scars are typically identified on mammography as stellate or spiculated masses. They can nearly replicate the appearance of a cancer. Macroscopy • Radial scars present as stellate, firm lumps that appear to infiltrate the adjacent parenchyma. • They can be readily mistaken for invasive carcinomas upon macroscopic examination.

Histopathology • Radial scars are symmetrical, stellate lesions of the breast with a distinctive zonal architecture. The lesion's center (the nidus) consists of tight collagen bundles and elastic tissue containing entrapped, randomly organized tubules. • Encircling the nidus are radially oriented clusters of ducts and lobules, each directed towards the center of the lesion. The ducts and lobules in this region generally display pronounced benign alterations, such as fibrocystic change, sclerosing adenosis, and significant usual epithelial hyperplasia.

Prognosis: Radial scars are classified as benign lesions; yet, their existence is linked to a twofold elevated risk of later breast cancer development