Myelodysplastic Syndromes (MDS)

Myelodysplastic syndromes, also termed myelodysplastic neoplasms in current classifications, are clonal disorders of the haematopoietic stem cell. The abnormal clone produces blood cells inefficiently and with dysplastic structure, so the marrow may be crowded with developing cells while the circulation remains short of functional red cells, neutrophils, or platelets. The resulting cytopenia determines what the nurse sees first: - Anaemia causes fatigue, reduced exercise tolerance, dyspnoea, dizziness, tachycardia, or chest discomfort when oxygen delivery cannot meet tissue demand. - Neutropenia weakens the inflammatory response. A serious infection may produce little local redness, drainage, or sputum, so fever or a subtle change in condition deserves attention. - Thrombocytopenia causes petechiae, easy bruising, gum or nose bleeding, prolonged bleeding from minor trauma, gastrointestinal blood loss, or, at very low counts, spontaneous serious haemorrhage. MDS can affect one lineage or several. Cytopenias may progress gradually, fluctuate with treatment, or worsen abruptly with infection, bleeding, medication toxicity, or transformation to AML. Prognosis is therefore not determined by the haemoglobin value alone; blast percentage, cytogenetic abnormalities, molecular findings, and the depth of the cytopenias all...