ICD-11 definition : Fechtner syndrome is one of the MYH9 syndromes (a group that includes four clinical
forms with similar manifestations resulting from mutations in the MYH9 gene: May-Hegglin
anomaly and Sebastian and Epstein syndromes) which are characterized by a macrothrombocytopenia
that is usually severe but paradoxically results in few if any symptoms. Macrothrombocytopenia
is defined by the presence of giant platelets, with a diameter equal or superior to
the diameter of a red cell. Fechtner syndrome inconstantly associates renal involvement
(interstitial glomerulonephritis), sensorineural deafness (especially in the high
frequency range), and cataract (potentially bilateral).;
Fechtner syndrome is one of the MYH9 syndromes (a group that includes four clinical
forms with similar manifestations resulting from mutations in the MYH9 gene: May-Hegglin
anomaly and Sebastian and Epstein syndromes) which are characterized by a macrothrombocytopenia
that is usually severe but paradoxically results in few if any symptoms. Macrothrombocytopenia
is defined by the presence of giant platelets, with a diameter equal or superior to
the diameter of a red cell. Fechtner syndrome inconstantly associates renal involvement
(interstitial glomerulonephritis), sensorineural deafness (especially in the high
frequency range), and cataract (potentially bilateral).