ERBB2 and neoplasm: USG-guided biopsy from scalp swelling malignant trichilemmal tumor with loss of CD34USG-guided Tru-cut biopsy of right breast IMC Her2-enriched molecularA PET CT scan showed multiple malignant-looking lesions in the right breast; right level I, II, and III axillary lymphadenopathy; and a large, malignant-looking solid cystic lesion involving the scalp on the left side of the nape of the neck.