Cytopenia - NOT Fanconi anaemia

Gene: TCN2

Amber List (moderate evidence)

TCN2 (transcobalamin 2)
EnsemblGeneIds (GRCh38): ENSG00000185339
EnsemblGeneIds (GRCh37): ENSG00000185339
OMIM: 613441, Gene2Phenotype
TCN2 is in 12 panels

1 review

Louise Daugherty (Genomics England Curator)

I don't know

Gene reviewed due to Haematology Specialist Test Group considering the inclusion of relevant neutropenia thrombocytopenia genes. The Specialist Test Group 21st October 2019 (consisting of 4 centres: WWMGLH, NWGLH, YNEGLH, LSGLH) all agreed that there was only enough evidence to rate this gene Amber. Additional comments from Haematology Specialist Test Group (Copy of Extra genes R91_consensus_v2.xlsx) 21st October 2019. Wessex and West Midlands GLH: Transcobalamin II deficiency - megaloblastic anaemia and pancytopenia; North West GLH: Syndromic; Yorkshire and North East GLH: no comment submitted; London South GLH: This gene is frequently requested, it is quite a specific phenotype - this gene is on R92 so think reasonable to keep it on this panel too.
Created: 4 Nov 2019, 7:30 p.m. | Last Modified: 4 Nov 2019, 7:30 p.m.
Panel Version: 0.135


Mode of Inheritance
BIALLELIC, autosomal or pseudoautosomal
  • Expert Review Amber
  • Expert review Amber
  • North West GLH
  • London South GLH
  • Yorkshire and North East GLH
  • Wessex and West Midlands GLH
  • Transcobalamin II deficiency, 275350
Clinvar variants
Variants in TCN2
Panels with this gene

History Filter Activity

4 Nov 2019, Gel status: 2

Added New Source, Status Update

Louise Daugherty (Genomics England Curator)

Source Expert Review Amber was added to TCN2. Rating Changed from Red List (low evidence) to Amber List (moderate evidence)

4 Nov 2019, Gel status: 1

Added New Source

Louise Daugherty (Genomics England Curator)

Source Expert review Amber was added to TCN2.

4 Nov 2019, Gel status: 1

Set mode of inheritance, Set Phenotypes

Louise Daugherty (Genomics England Curator)

Mode of inheritance for gene TCN2 was changed from to BIALLELIC, autosomal or pseudoautosomal Added phenotypes Transcobalamin II deficiency, 275350 for gene: TCN2

4 Nov 2019, Gel status: 1

Created, Added New Source, Set mode of inheritance

Louise Daugherty (Genomics England Curator)

gene: TCN2 was added gene: TCN2 was added to Cytopenia - NOT Fanconi anaemia. Sources: Wessex and West Midlands GLH,Yorkshire and North East GLH,London South GLH,North West GLH,NHS GMS Mode of inheritance for gene: TCN2 was set to