Local recurrence of breast cancer caused by core needle biop
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Needle tract seeding is the implantation of tumor cells at the site of needle passage during needle biopsy. Histopathological examination of resected specimens after biopsy shows an incidence of 22%–50%. However, reports of actual local recurrence are extremely rare.

A 67-year-old woman was diagnosed with ductal carcinoma by histopathology and underwent right mastectomy and sentinel lymph node biopsy. Histopathological examination revealed non-invasive ductal carcinoma. One year after the first operation, a mass was found at the site of the core needle biopsy (CNB) scar near the previous surgical wound on the right chest. Histological examination revealed the tumor as adenocarcinoma, and a skin lesion resection was performed. After surgery, radiation therapy and endocrine therapy were performed. She remains relapse-free as of this writing, 9 months after resection.

The risk of seeding is high with multiple punctures in CNB, in cases with a short period until surgery, and in mucinous carcinoma. Considering these factors, CNB puncture should preferably be at a site that is included in the resection area during surgery. If not resected, close follow-up is necessary considering the possibility of local recurrence.

Source: https://www.sciencedirect.com/science/article/pii/S2210261220304053?dgcid=rss_sd_all
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