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Cases of the Day¹

Breast Imaging Case of the Day

¹ From the Departments of Radiological Sciences (D.C.) and Pathology (P.M.C.), University of California, Irvine Medical Center (N.B.R.), 101 The City Drive, Orange, CA 92868-3298. From the 1998 RSNA scientific assembly. Received November 6, 1998; revision requested November 23 and received December 21; accepted December 22. Address reprint requests to D.C.

View larger version (65K): [in a new window]   Figure 1a.  (a) Mediolateral oblique mammogram of the left breast shows a circumscribed mass (arrowhead) and an unsuspected spiculated lesion superior to it (arrow). (b) Craniocaudal mammogram does not clearly show the palpable mass but does show the spiculated lesion (arrow). (c) Coned magnification mediolateral oblique mammogram shows the translucent center of the spiculated lesion with asymmetric clumping of spicules.

View larger version (58K): [in a new window]   Figure 1b.  (a) Mediolateral oblique mammogram of the left breast shows a circumscribed mass (arrowhead) and an unsuspected spiculated lesion superior to it (arrow). (b) Craniocaudal mammogram does not clearly show the palpable mass but does show the spiculated lesion (arrow). (c) Coned magnification mediolateral oblique mammogram shows the translucent center of the spiculated lesion with asymmetric clumping of spicules.

View larger version (68K): [in a new window]   Figure 1c.  (a) Mediolateral oblique mammogram of the left breast shows a circumscribed mass (arrowhead) and an unsuspected spiculated lesion superior to it (arrow). (b) Craniocaudal mammogram does not clearly show the palpable mass but does show the spiculated lesion (arrow). (c) Coned magnification mediolateral oblique mammogram shows the translucent center of the spiculated lesion with asymmetric clumping of spicules.

View larger version (159K): [in a new window]   Figure 2a.  (a) Photomicrograph (original magnification, x5; hematoxylin-eosin stain) shows infiltrative growth of tubular carcinoma into adjacent fat; this growth pattern gives the lesion its spiculated appearance. (b) Photomicrograph (original magnification, x200; hematoxylin-eosin stain) shows tubules with patent lumina and angulated borders. The individual cells show low-grade cytologic features with little nuclear pleomorphism.

View larger version (151K): [in a new window]   Figure 2b.  (a) Photomicrograph (original magnification, x5; hematoxylin-eosin stain) shows infiltrative growth of tubular carcinoma into adjacent fat; this growth pattern gives the lesion its spiculated appearance. (b) Photomicrograph (original magnification, x200; hematoxylin-eosin stain) shows tubules with patent lumina and angulated borders. The individual cells show low-grade cytologic features with little nuclear pleomorphism.