PMC6465717_01
(a) CT scan showing a high contrast mass, but no axial lymph node swelling. Abnormal findings were observed in distant organs. (b) Contrast-enhanced MRI showing a mass in the same region that had early arterial enhancement and gradual washout.
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F1
The patient was admitted to our hospital with complaints of a mass in the right breast without axial lymph node swelling on computed tomography (CT) (Fig. 1a). Contrast-enhanced mic resonance imaging (MRI) showed a mass with early arterial enhancement and gradual washout measuring 9.3 x 5.8 x 10.7 mm (Fig. 1b).
The tumor shows trabecular growth patterns with a rosette formation.
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F2
The final pathologic diagnosis was NECB with small polygonal cells having a small amount of cytoplasm, high nuclear-cytoplasmic ratio, and finely granular chromatin (Fig. 2).
(a) CT reveals the presence of anterior mediastinal lymph node metastasis. (b) After chemotherapy, CT reveals no lymph node metastases.
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F3
Forty months after a right breast mastectomy, CT revealed anterior mediastinal lymph node recurrence (Fig. 3a). CT was performed after the chemotherapy and anterior mediastinal lymph node recurrence was not detected (Fig. 3b).