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BabyScreen+ newborn screening v0.1863 RUNX1 Zornitza Stark Classified gene: RUNX1 as Green List (high evidence)
BabyScreen+ newborn screening v0.1863 RUNX1 Zornitza Stark Gene: runx1 has been classified as Green List (High Evidence).
BabyScreen+ newborn screening v0.1862 RUNX1 Zornitza Stark edited their review of gene: RUNX1: Changed rating: GREEN
BabyScreen+ newborn screening v0.1773 RUNX1 Zornitza Stark Marked gene: RUNX1 as ready
BabyScreen+ newborn screening v0.1773 RUNX1 Zornitza Stark Gene: runx1 has been classified as Amber List (Moderate Evidence).
BabyScreen+ newborn screening v0.1773 RUNX1 Zornitza Stark Classified gene: RUNX1 as Amber List (moderate evidence)
BabyScreen+ newborn screening v0.1773 RUNX1 Zornitza Stark Gene: runx1 has been classified as Amber List (Moderate Evidence).
BabyScreen+ newborn screening v0.1772 RUNX1 Zornitza Stark gene: RUNX1 was added
gene: RUNX1 was added to gNBS. Sources: ClinGen
for review, treatable, haematological tags were added to gene: RUNX1.
Mode of inheritance for gene: RUNX1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Phenotypes for gene: RUNX1 were set to Platelet disorder, familial, with associated myeloid malignancy, MIM# 601399
Review for gene: RUNX1 was set to AMBER
Added comment: Assessed as 'moderate actionability' in paediatric patients by ClinGen.

HTHCPS is characterized by mild to moderate thrombocytopenia with normal platelet size, abnormal platelet functioning (defective release of delta granules and/or aggregation defects), and an increased risk of developing a haematologic malignancy.

Age of onset of bleeding can be highly variable, with some individuals presenting in early infancy and others not recognizing their symptoms until much later in life. Severe thrombocytopenia or profound platelet dysfunction can result in recognition during the perinatal or infancy period. Hematologic malignancies can occur in childhood or adulthood; the range of age of onset is wide with a median age of 33 years.

Use of clotting promotors (e.g., desmopressin, epsilon aminocaproic acid, tranexamic acid) can be used for surgeries, injuries, or dental treatments. Platelet transfusions may be used for severe bleeding or procedures with a high bleeding risk.

Though there is no specific treatment for HTHCPS, there are recommendations regarding the indications and timing of hematopoietic stem cell transplantation (HSCT) that vary. HSCT in pre-malignancy patients, particularly in the absence of any clonal progression, is debatable due to transplantation-associated risks and incomplete penetrance. Some suggested indications for HSCT include severe or symptomatic cytopenias, severe marrow dysplasia (particularly in the context of falling blood counts), complex or high-risk (e.g., monosomy 7) cytogenetic abnormalities (particularly if the clones are large or increasing in size) and increasing blasts >5%.

Consider use of a medical alert bracelet for thrombocytopenia, platelet dysfunction, or hematologic malignancy as indicated.
Sources: ClinGen