From the NIH: Collagen provides clues to diagnose spread of cancer to lymph nodes.
D001943:Breast Neoplasms / Q000556:secondary*; D002277:Carcinoma / Q000556:secondary*; D003094:Collagen / Q000032:analysis*; D005260:Female; D005455:Fluorescent Antibody Technique; D006801:Humans; D008207:Lymphatic Metastasis / Q000175:diagnosis*
D003094:Collagen