case_images: PMC10601741_01
case_images: Physical findings: front view (a) and lateral view (b). A mass with elasticity and hardness was observed just below the right nipple. Subcutaneous hemorrhage due to needle biopsy can be seen.
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case_images: PMC10601741_01_cro-2023-0016-0001-533382_F01.jpg
case_images: F1
case_images: There were no abnormal findings on the skin or nipple, and no axillary lymph nodes were palpable (Fig. 1).
case_images: Findings from ultrasonography: a a well-defined intracystic tumor formed a level of liquid (blue arrow), and blood collection was suspected. b The papillary lesions arose from the cyst wall. c By Doppler ultrasound, blood flow was observed in solid components.
case_images: cro-2023-0016-0001-533382_F02.jpg
case_images: PMC10601741_01_cro-2023-0016-0001-533382_F02.jpg
case_images: F2
case_images: The cyst contained a fluid level formation, suggesting retention of blood (Fig. 2).
case_images: Pathological findings: a the cut surface of the tumor. The papillary lesions arose from the cyst wall. b, c Hematoxylin and eosin staining. Mildly atypical cells showed papillary growth with fibrous stalk. d Immunohistochemistry for p63, showing a lack of staining in cancer cells.
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case_images: PMC10601741_01_cro-2023-0016-0001-533382_F03.jpg
case_images: F3
case_images: Gross examination reveals a cystic structure 35 mm in diameter just below the nipple and an internal papillary lesion (Fig. 3). Myoepithelial cells were sometimes absent at the peripheral borders of the compressively proliferating tumor (Fig. 3).