Patients with diagnosis histologically confirmed T-cell or NK-cell lymphoma will be registered in the study, despite of their planned treatment. Registration will be made on-line on a key restricted accessible web-database after obtaining the informed consent dated and signed by the patient. Every registered patient has as well to undergo a central histopathology review by a panel of experts. The referring pathologist will collect and review the patological material sent by the participating centers, without knowing the clinical outcome of the patient. Validated cases have to be supplied of information regarding treatment procedures and follow up updating for at least 5 years. The primary endpoint is the overall survival and other endpoints such as event free survival; progression free survival, complete and partial response rates.
