Acute nonlymphocytic leukemias and dysmyelopoietic syndromes in patients treated for Hodgkin's lymphoma

The clinical, hematological, and cytogenetical features of six patients with hematological disorders secondary to Hodgkin's lymphoma (HL), are described. Three patients developed a dysmyelopoietic syndrome (DMS); three, an acute nonlymphocytic leukemia (ANLL). Chromosomal analyses showed a normal karyotype in one case and an abnormal one in five cases: one with a 53-chromosome clone, two with a pseudodiploid pattern plus hyperdiploid subclones, and two with a hypodiploid pattern. Trisomy 21 was observed in two cases, tetrasomy 21 in one case, monosomy 5 and monosomy 7 in two cases. The correlations of chromosomal changes with hematological abnormalities or clinical aspects are discussed.

Normal bone marrow karyotype in paroxysmal nocturnal hemoglobinuria--a cooperative European study

Sixteen patients with paroxysmal nocturnal hemoglobinuria (PNH) from five European centers have been submitted to chromosome analysis. All of them had a normal bone marrow karyotype. The associations between some chromosomally abnormal cases reported in the literature and "typical" PNH or PNH phenomenon during the course of other hematological disorders are discussed.