Pathology General aa87c9fb Blood born metastasis is unusual of - A Osteosarcoma B Medullary carcinoma breast C Chorio carcinoma D Renal cell carcinoma High-Yield Explanation Lymphatic or vascular invasion is never seen in medullary Carcinoma of breast. Osteosarcoma, Choriocarcinoma and RCC metastatize to distant organs by vascular invasion.