Mammography:
They are present as irregular masses in 75% of the cases, circumscribed
oval or round masses in 18% of the cases and with indistinct margins or
architectural distortion in 8% of the cases [14,41]. They are often
hyperdense or isodense [14]. Even if the mass is circumscribed, it
is infiltrated on microscopy. Retrospective careful review of the images
often demonstrates some focally indistinct or spiculated margins.
Generally, microcalcifications are not seen [14,41,42,43]. GCTBs are
usually small, less than 3 cm in diameter. Some other reported features
are hypodense rim and heterogeneity [11,14,41]. GCTBs are frequently
reported in the upper and upper inner quadrant of the breast in up to 83
% of the cases [40], which matches the cutaneous sensory branches
of the supraclavicular nerve [7,40,44], but they are reported in all
quadrants and in the axilla. GCTB can not only invade adjacent
structures such as overlying skin or muscles [14], but also can
invade adjacent fibroadenomas or lymph nodes [46] and be associated
with fat necrosis [16] or breast malignancy [28,40].