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We report 3 cases in which small liver lesions were revealed on sonography with the supplemental use of a high‐frequency transducer. In all 3 cases, the patients had cirrhosis or chronic liver disease. The lesions were not seen on computed tomography or magnetic resonance imaging. Sonography plays a pivotal role in surveillance for hepatocellular carcinoma and, with modern transducer technology, may be the first imaging modality to show an early small tumor. A more thorough search for focal liver lesions with adjunctive use of high‐frequency transducers may prolong the examination time but can improve surveillance for hepatocellular carcinoma.

OBJECTIVE: To evaluate patterns of enhancement in the nipple-areolar-complex (NAC) on contrast-enhanced MRI. METHODS: We reviewed the MR images of 37 patients in which enhancement of the NAC was demonstrated on gadolinium-enhanced dynamic fast radiofrequency spoiled gradient recalled echo (fast-SPGR) images. Time intensity profiles derived from signal intensity values were constructed, and findings correlated with histological results. RESULTS: Three types of curve were observed. In the first type seen in adenoma of the nipple, rapid initial increase in signal intensity with an early peak (1 min) occurred followed by gradual washout. In the second type seen in direct invasion from carcinoma, subareolar intracystic papilloma, or Paget's disease, rapid initial increase in signal intensity followed by a more gradual increase or plateau was seen. In the third type seen in carcinoma without nipple invasion, fibrocystic disease and fibroadenoma, a gradual increase in signal intensity was observed throughout the examination period. CONCLUSION: Early and prominent enhancement of the NAC on contrast-enhanced MRImay indicate the presence of a primary lesion in the NAC or secondary involvement by a primary tumor elsewhere in the breast.

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