CD79A and neoplasm: However, co-localisation studies (e.g., double staining) would be required to confirm a direct relationship, which we did not perform in this pilot study This expression pattern, with epithelial cells exhibiting positivity for both CD79a and IgA, may indicate a shared or overlapping pathway in immune response or tumor immunology, warranting further investigation to elucidate the mechanisms underlying this phenomenon and its implications for tumor behavior and treatment.