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Breast Imaging Case of the Day¹

¹ From the Departments of Radiological Sciences (D.C.) and Pathology (P.M.C.), University of California, Irvine Medical Center, 101 The City Drive, Orange, CA 92868-3298. From the 1998 RSNA scientific assembly. Received February 19, 1999; revision requested March 3 and received April 8; accepted April 12. Address reprint requests to D.C.

View larger version (90K): [in a new window]   Figure 1a.   (a, b) Initial craniocaudal (a) and mediolateral oblique (b) mammograms of the right breast demonstrate a circumscribed area of lucency with a thin capsule in the upper outer quadrant (arrow), a finding that is compatible with a lipid cyst. (c) Magnified craniocaudal view of the area of interest shows the lipid cyst to better advantage.

View larger version (105K): [in a new window]   Figure 1b.   (a, b) Initial craniocaudal (a) and mediolateral oblique (b) mammograms of the right breast demonstrate a circumscribed area of lucency with a thin capsule in the upper outer quadrant (arrow), a finding that is compatible with a lipid cyst. (c) Magnified craniocaudal view of the area of interest shows the lipid cyst to better advantage.

View larger version (129K): [in a new window]   Figure 1c.   (a, b) Initial craniocaudal (a) and mediolateral oblique (b) mammograms of the right breast demonstrate a circumscribed area of lucency with a thin capsule in the upper outer quadrant (arrow), a finding that is compatible with a lipid cyst. (c) Magnified craniocaudal view of the area of interest shows the lipid cyst to better advantage.

View larger version (107K): [in a new window]   Figure 2a.   (a, b) Craniocaudal (a) and mediolateral oblique (b) mammograms obtained 3 years after Figure 1 no longer show the lipid cyst. However, new heterogeneous microcalcifications are seen in the same area (arrow). (c) Coned compression magnification craniocaudal view demonstrates the calcifications more clearly.

View larger version (113K): [in a new window]   Figure 2b.   (a, b) Craniocaudal (a) and mediolateral oblique (b) mammograms obtained 3 years after Figure 1 no longer show the lipid cyst. However, new heterogeneous microcalcifications are seen in the same area (arrow). (c) Coned compression magnification craniocaudal view demonstrates the calcifications more clearly.

View larger version (136K): [in a new window]   Figure 2c.   (a, b) Craniocaudal (a) and mediolateral oblique (b) mammograms obtained 3 years after Figure 1 no longer show the lipid cyst. However, new heterogeneous microcalcifications are seen in the same area (arrow). (c) Coned compression magnification craniocaudal view demonstrates the calcifications more clearly.

View larger version (184K): [in a new window]   Figure 3.   Photomicrograph (original magnification, x200; hematoxylin-eosin stain) of a specimen obtained at stereotactically guided core needle biopsy demonstrates necrotic adipocytes centrally. The adipocytes lack cell nuclei and are surrounded by bands of fibrosis. Deeply basophilic calcium deposits are scattered throughout the fibrotic area.