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Diagnostic ultrasound ( PDFDrive )

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784 PART III Small Parts, Carotid Artery, and Peripheral Vessel Sonography

A

B

FIG. 21.35 Use of Color Doppler Ultrasound for Mural Nodules. (A) Mural nodules caused by intracystic carcinoma, as in this case, tend

to be fed by multiple vessels. (B) Mural nodules caused by papillary apocrine metaplasia (PAM) rarely develop a ibrovascular stalk with demonstrable

low on color Doppler ultrasound.

A B 1 2C RAD

C

FIG. 21.36 Microcysts. Clustered microcysts can represent (A) ibrocystic change, in which the microcysts are caused by papillary apocrine

metaplasia (PAM), or (B) neoplasm, in which the microcysts represent ducts distended with secretions and micropapillary ductal carcinoma in situ

(DCIS). Unfortunately, the gray-scale appearances of ibrocystic change and DCIS may be indistinguishable. (C) However, clustered microcysts

caused by micropapillary DCIS frequently show internal blood low on color or power Doppler ultrasound, whereas clustered microcysts caused

by PAM, as with mural nodules caused by PAM, rarely have demonstrable internal low.

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