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During a 15-year period, 161 adult patients were diagnosed with secondary acute myeloid leukemia (s-AML) in the region of Southern Denmark. In 73 patients, the AML diagnosis was preceded by myelodysplastic syndrome (MDS-AML), in 31 patients by an antecedent hematologic disease, and in 57 patients by treatment with chemotherapy and/or irradiation (t-AML). Cytogenetic analysis was carried out in 93%, of which 61% had clonal chromosome aberrations. MDS-AML correlated to a normal karyotype (P

History was taken systematically for 100 azoospermic, nonvasectomized men referred consecutively to a Danish fertility clinic. The men were examined by ultrasound, and their blood samples were analyzed for karyotype, Y microdeletions, and cystic fibrosis transmembrane conductance regulator gene mutations. In 29% of patients, the condition could be explained by genetic abnormalities; in 22%, by diseases or external influence; and in 27%, by former cryptorchidism. The azoospermic condition remained unexplained in only 22%.

Papillomatous tissue samples from 12 adult patients with laryngeal papillomatosis were examined by light microscopy before and after interferon-alpha (IFN) treatment. Increased atypia, a change in intra-epithelial differentiation, sclerosis of the underlying stroma and infiltration of especially plasma cells were found in tumour tissue removed after 3 weeks of IFN treatment. These morphological findings do not explain the effects exerted by IFN on the growth pattern of adult laryngeal papillomatosis, but provide a basis for further studies.