In a case report [15] by Naik et al. in 2005, a metastatic intramuscular mass removed from the suprapubic area of a 56-year-old man with rectal adenocarcinoma turned out at histology to be a lesion without muscular tissue made of nidus of mature bone tissue with osteoblasts and osteocytes alternated with necrotic areas and deposits of mucin with no bone marrow formation or cartilage tissue. This evidence concerns the gene MUC5AC and rectum adenocarcinoma.