The excessive weight loss is an ominous sign, with roughly 20% of cancer deaths attributed to cachexia (Lee,1999).And there present at diagnosis with cachexia at more than 80% of patients pancreatic cancer and 60% of patients with lung cancer(Tisdale ,2002).
More than 50% of patients with advanced head and neck cancer have significant weight loss and possible cachexia ( Buntzel and Kuttner ,1995).