Of the remaining 55 patients (49.55%) with positive SLN, there were 9 (16.36%) ITC (total tumor load (TTL) less than 250 mRNA CK19 copies/μL), 30 (54.55%) micrometastases and 16 (29.09%) macrometastases (TTL between 270 and 2,190,000 mRNA CK19 copies/μL). The gene discussed is KRT19; the disease is neoplasm.