Accurate resection of nonpalpable, ultrasonography undetectable breast cancer tumor by preoperative indocyanine green injection using stereotactic mammography: A case report.

INTRODUCTION: and importance: Tumor localization is vital in the surgical management of nonpalpable breast cancer. Various localization methods exist, each with their own disadvantages. Therefore, we need to investigate the optimal method of diagnosis for this condition.

CASE PRESENTATION: A 66-year-old woman presented to our facility with a microcalcification detected on screening mammography (MMG). The lesion was neither palpable nor detectable on ultrasonography (US). Three-dimensional stereotactic biopsy using MMG revealed ductal carcinoma in situ. The precise tumor location was needed to perform breast-conserving surgery.

CLINICAL DISCUSSION: Our hospital did not have radioisotope imaging; hence, wire placement would have been difficult for this lesion location. To aid in localization, indocyanine green (ICG) and fluorescence imaging were used. ICG was injected preoperatively using stereotactic MMG, which enabled clear visualization of the lesion. Then, an accurate resection was performed. The patient was discharged without any complications 2 days after surgery.

CONCLUSION: The findings of this case report suggest that stereotactic MMG-guided ICG can be useful in localizing breast cancer tumors that are nonpalpable and undetectable by US.