title: Necrobiotic granuloma formation at a collagen implant treatment site.
mesh_terms: D003094:Collagen; D005145:Face / Q000601:surgery; D005260:Female; D005549:Foreign-Body Reaction / Q000209:etiology*; D006801:Humans; D008875:Middle Aged; D019736:Prostheses and Implants / Q000009:adverse effects*; D013518:Surgery, Plastic
chemical_list: D003094:Collagen