TCN2

transcobalamin 2
OMIM: 613441, Gene2Phenotype

11 panels

Panel	Reviews	Mode of inheritance	Details
Filter panels 11 panels
Green TCN2 in COVID-19 research Level 2: Viral research Version 1.146	review	BIALLELIC, autosomal or pseudoautosomal	Sources IUIS Classification February 2018 SCID v1.6 A- or hypo-gammaglobulinaemia v1.25 London North GLH NHS GMS GRID V2.0 Congenital neutropaenia v1.22 Victorian Clinical Genetics Services North West GLH ESID Registry 20171117 Combined B and T cell defect v1.12 Agranulocytosis v1.3 Expert Review Green NHS GMS North West GLH London North GLH IUIS Classification February 2018 Victorian Clinical Genetics Services Expert Review Green ESID Registry 20171117 GRID V2.0 Congenital neutropaenia v1.22 SCID v1.6 Combined B and T cell defect v1.12 Agranulocytosis v1.3 A- or hypo-gammaglobulinaemia v1.25 Phenotypes Transcobalamin-2 precursor Transcobalamin II deficiency Agammaglobulinemia Megaloblastic anemia, pancytopenia, if untreated for prolonged periods results in intellectual disability pancytopenia Transcobalamin II deficiency, 275350 neutropenic colitis Defects of Vitamin B12 and Folate metabolism megaloblastic bone can have a presentation similar to severe combined immunodeficiency Combined immunodeficiencies with associated or syndromic features
Green TCN2 in Primary immunodeficiency or monogenic inflammatory bowel disease Level 2: Immunology Version 8.78 Latest signed off version: v8.0 (30 Apr 2025)	review	BIALLELIC, autosomal or pseudoautosomal	Sources Expert Review Green Other NHS GMS North West GLH London North GLH IUIS Classification February 2018 Victorian Clinical Genetics Services ESID Registry 20171117 GRID V2.0 Congenital neutropaenia v1.22 SCID v1.6 Combined B and T cell defect v1.12 Agranulocytosis v1.3 A- or hypo-gammaglobulinaemia v1.25 Phenotypes Transcobalamin II deficiency, 275350 Transcobalamin II deficiency can have a presentation similar to severe combined immunodeficiency pancytopenia neutropenic colitis Agammaglobulinemia megaloblastic bone Transcobalamin-2 precursor Defects of Vitamin B12 and Folate metabolism Megaloblastic anemia, pancytopenia, if untreated for prolonged periods results in intellectual disability Combined immunodeficiencies with associated or syndromic features
Green TCN2 in Cytopenias and congenital anaemias Level 3: Anaemias and red cell disorders Level 2: Haematological disorders Version 1.123	review	BIALLELIC, autosomal or pseudoautosomal	Sources Expert Review Green Literature Phenotypes Transcobalamin II deficiency can have a presentation similar to severe combined immunodeficiency pancytopenia neutropenic colitis Agammaglobulinemia megaloblastic bone marrow thrombocytopenia neutropenia failure to thrive hypotonia, myoclonic like movements, pallor, purpura, anaemia, thrombocytopenia, megaloblastosis, aplastic bone marrow.
Green TCN2 in Rare anaemia Level 2: Haematology Version 3.19 Latest signed off version: v3.0 (22 Mar 2023)	review	BIALLELIC, autosomal or pseudoautosomal	Sources Expert Review Green North West GLH Yorkshire and North East GLH London South GLH NHS GMS Wessex and West Midlands GLH Phenotypes megaloblastic bone marrow failure to thrive 275350 Transcobalamin II deficiency pancytopenia neutropenic colitis thrombocytopenia Transcobalamin II deficiency neutropenia hypotonia, myoclonic like movements, pallor, purpura, anaemia, thrombocytopenia, megaloblastosis, aplastic bone marrow can have a presentation similar to severe combined immunodeficiency Agammaglobulinemia
Amber TCN2 in Cytopenia - NOT Fanconi anaemia Level 2: Haematology Version 4.32 Latest signed off version: v4.0 (30 Apr 2025)	review	BIALLELIC, autosomal or pseudoautosomal	Sources Expert Review Amber Expert review Amber NHS GMS North West GLH London South GLH Yorkshire and North East GLH Wessex and West Midlands GLH Phenotypes Transcobalamin II deficiency, 275350
Green TCN2 in Undiagnosed metabolic disorders Level 3: Specific metabolic abnormalities Level 2: Metabolic disorders Version 1.642	review	BIALLELIC, autosomal or pseudoautosomal	Sources Expert Review Green Literature Phenotypes Transcobalamin II deficiency (Disorders of cobalamin absorption, transport and metabolism) A- or hypo-gammaglobulinaemia Agranulocytosis Combined B and T cell defect Congenital neutropaenia Intellectual disability SCID
Green TCN2 in Likely inborn error of metabolism Level 2: Metabolic Version 8.91 Latest signed off version: v8.0 (30 Apr 2025) Component of the following Super Panels: Childhood onset leukodystrophy Hypotonic infant Paediatric disorders Unexplained death in infancy and sudden unexplained death in childhood	review	BIALLELIC, autosomal or pseudoautosomal	Sources Expert Review Green London North GLH NHS GMS Phenotypes Congenital neutropaenia Intellectual disability A- or hypo-gammaglobulinaemia Agranulocytosis Combined B and T cell defect SCID Transcobalamin II deficiency (Disorders of cobalamin absorption, transport and metabolism)
Red TCN2 in Fetal anomalies Level 2: Fetal (including NIPD) Version 6.140 Latest signed off version: v6.0 (30 Apr 2025)	review	BIALLELIC, autosomal or pseudoautosomal	Sources Expert Review Red PAGE DD-Gene2Phenotype Phenotypes Transcobalamin II deficiency
Green TCN2 in DDG2P Version 6.424 Latest signed off version: v6.0 (30 Apr 2025) Component of the following Super Panels: Paediatric disorders	review	BIALLELIC, autosomal or pseudoautosomal	Sources DD-Gene2Phenotype Expert Review Green Phenotypes Transcobalamin II deficiency
Green TCN2 in Intellectual disability Level 2: Developmental disorders Version 9.285 Latest signed off version: v9.0 (30 Apr 2025) Component of the following Super Panels: Childhood onset leukodystrophy Hypotonic infant Paediatric disorders	review	BIALLELIC, autosomal or pseudoautosomal	Sources Expert Review Green Literature Phenotypes Transcobalamin II deficiency can have a presentation similar to severe combined immunodeficiency pancytopenia neutropenic colitis Agammaglobulinemia megaloblastic bone marrow thrombocytopenia neutropenia failure to thrive hypotonia, myoclonic like movements, pallor, purpura, anaemia, thrombocytopenia, megaloblastosis, aplastic bone marrow.
Red TCN2 in Childhood onset dystonia, chorea or related movement disorder Level 2: Neurology Version 7.13 Latest signed off version: v7.0 (30 Apr 2025)	review	Not set	Sources Expert Review Red London North GLH