Breast

Localized inflammatory swelling that is very tender & fluctuant on palpation. Lateral side Medial side
Acute suppurative mastitis (abscess)

FNA: tissue necrosis with neutrophils in acute mastitis

Acute suppurative mastitis (abscess)

resembles breast carcinoma

TB mastitis

The histopathologic examination of the specimen revealed granulomas with epitheloid histiocytes, Langhans' giant cells, and intense lymphocytic infiltration at the periphery.
TB mastitis

Acid-fast bacilli (arrows) in tissue sections of the patient (Ziehl-Neelsen stain, original magnification x 1,000).
TB mastitis

A patient with IGM of the right breast status-post incisional breast biopsy. Clinical presentation of IGM may mimic common entities such as breast mastitis, as well as more involved diagnoses such as malignancy. 2. Patient with a firm mass having multiple sinuses, in her left breast, before treatment. Note the breast asymmetry.
Idiopathic granulomatous mastitis

Grossly the excised mass resembles infiltrating carcinoma

Idiopathic granulomatous mastitis


Photomicrograph of hematoxylin and eosin specimen from (1). Arrows indicate granulomatous inflammation centered on breast lobules, while arrowhead indicates the presence of multinucleated giant cells within non-caseating granulomatous inflammation (magnification 100Ч; bar = 150 μm). Idiopathic granulomatous mastitis

Duct ectasia Breast

Some of the dilated ducts contain a thick dark material.


Retraction of skin in a patient with fat necrosis (arrow). Traumatic fat necrosis of the female breast and its differentiation from carcinoma.
Fat necrosis breast clin

Fat necrosis Breast

Post-traumatic fat necrosis involving breast. There is a central focus of necrotic fat surrounded by inflammatory cells.