Prognosis of extranodal NK/T-cell lymphoma (ENKL). (A) ENKLs of nasal origin show better prognosis than that of extranasal origin (P = .01). (B) When restricted to limited stages (I + II), the prognosis of nasal and extranasal ENKLs are almost the same (P = .86). (C) For advanced stages (III + IV), there is no statistical difference (P = .08).