Abstract
Rare tumors represent one-fifth of all cancers. The entire half of the patients, however, the diagnosis of a rare malignant tumor dies.
Symptoms are rare tumors similar to tumors frequently. However, it is extremely important to pay attention to differences, to ensure earlier diagnosis and thus higher treatment success in patients with rare tumors.
Their infrequent occurrence and great variability is caused by a diagnostic and therapeutic uncertainty or embarrassment. Often lacking uniform treatment recommendations; treatment of these malignancies are often governed only by retrospective studies and is based only on individual clinical cases.