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. 2007 Nov;31(11):1461-8.
doi: 10.1016/j.leukres.2007.03.015. Epub 2007 May 16.

Idiopathic cytopenia of undetermined significance (ICUS) versus low risk MDS: the diagnostic interface

Friedrich Wimazal  1 , Christa Fonatsch, Renate Thalhammer, Ilse Schwarzinger, Leonhard Müllauer, Wolfgang R Sperr, John M Bennett, Peter Valent
Affiliations

Idiopathic cytopenia of undetermined significance (ICUS) versus low risk MDS: the diagnostic interface

Friedrich Wimazal et al. Leuk Res. 2007 Nov.

Abstract

It may sometimes be difficult to diagnose low risk MDS in patients with mild cytopenia. We report on 10 patients with mild to marked, unexplained cytopenia without definitive signs of a myeloid neoplasm. In two patients, a karyotype-abnormality (trisomy 14; monosomy 7) was detected in a small subset of bone marrow cells. Progression to overt MDS was seen in two patients including the one with monosomy 7. In the remaining cases, no MDS developed in a follow-up of at least 6 months. The phrase "idiopathic cytopenia of undetermined significance (ICUS)", as also suggested by Mufti and co-workers, is proposed and long term follow-up is recommended to assess the evolution.

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