Case#: Patient 5 (P5) is a 19-year-old Chinese female.

DiseaseAssertion: Patients are asserted to have "CTLA4 haploinsufficiency (CTLA-4 h).

FamilyInfo: The patients mother, who harbors the same CTLA4 variant reported a history of chronic urticaria, alopecia areata, and intermittent diarrhea for over 10 years.

CasePresentingHPOs: HP:0001903 (Anemia), HP:0007418 (Alopecia totalis), HP:0002254 (Intermittent diarrhea), HP:0000964 (Eczematoid dermatitis), HP:0002716 (Lymphadenopathy), HP:0004818 (Paroxysmal nocturnal hemoglobinuria), HP:6000344 (Anti-intrinsic factor antibody positivity), HP:0000988 (Skin rash), HP:0004386 (Gastrointestinal inflammation), HP:0034839 (Lymphoid hyperplasia), HP:0040088 (Abnormal lymphocyte count), HP:0020062 Decreased hemoglobin concentration, HP:0025066 (Decreased mean corpuscular volume), HP:0025547 (Decreased mean corpuscular hemoglobin concentration)

CaseHPOFreeText: Patient's symptoms onset at age 10. Gastrointestinal endoscopy showed chronic inflammation and lymphoid hyperplasia. Patient has been treated with subcutaneous injections of abatacept (125mg) with notable clinical improvement. Fine white hair has started to regrow on her scalp, eyebrows, and eyelashes, and facial skin shows mild scaling.

CaseNotHPOs:

CaseNotHPOFreeText: Autoimmune screening including antinuclear antibodies were negative.

CasePreviousTesting: None reported.

GenotypingMethod: Genotyping was performed via whole exome sequencing.

PreviouslyPublished No prior article is known to contain information on the same proband.

Variant: The patient is heterozygous for the NM_005214.4 CTLA4):c.151C>T (p.Arg51Ter) variant.

ClinVar: 161109

gnomAD: The variant was not found in gnomAD v4.1.1.

SupplementalData: There is no supplemental data.

Case#: Patient 7 (P7) is a 50-year-old Chinese male.

DiseaseAssertion: Patients are asserted to have "CTLA4 haploinsufficiency (CTLA-4 h).

FamilyInfo:

CasePresentingHPOs: HP:0012735 (Cough), HP:0002014 (Diarrhea), HP:0000988 (Skin rash), HP:0001596 (Alopecia), HP:0004313 (Decreased circulating immunoglobulin concentration), HP:0004386 (Gastrointestinal inflammation)

CaseHPOFreeText: Patient's symptoms onset in his late 30s with respiratory and gastrointestinal symptoms. He developed pruritic rashes on the abdomen and bottom of the feet, as well as alopecia. Gastrointestinal histopathology finding included intestinal metaplasia in the gastric angle and pyloric mucosa, as well as lymphoid follicle formation in the descending duodenum.

CaseNotHPOs: HP:0003493 (Antinuclear antibody positivity), HP:0034092 (Anti-cyclic citrullinated peptide antibody positivity),

CaseNotHPOFreeText: Patient was negative for inflammatory bowel disease antibodies.

CasePreviousTesting: None reported.

GenotypingMethod: Genotyping was performed via whole exome sequencing.

PreviouslyPublished No prior article is known to contain information on the same proband.

Variant1: The patient is heterozygous for the NM_005214.4 CTLA4):c.151C>T(p.Arg51Ter) variant.

ClinVar1: 161109

gnomAD1: The variant was not found in gnomAD v4.1.1.

Variant2: The patient is heterozygous for the NM_012452.3(TNFRSF13B):c.788C>T (p.Thr263Ile) variant.

ClinVar2: 1696714

gnomAD2: This variant has an allele frequency of 0.00009138 in gnomAD v4.1.1. (https://gnomad.broadinstitute.org/variant/chr17-16939641-G-A?dataset=gnomad_r4)

Variant3: The patient is heterozygous for the NM_012452.3(TNFRSF13B):c.178C>T (p.Arg60Cys) variant.

CAID3: CA8414096

gnomAD3: This variant has an allele frequency of 0.00006666 in gnomAD v4.1.1. (https://gnomad.broadinstitute.org/variant/chr17-16952467-G-A?dataset=gnomad_r4)

SupplementalData: There is no supplemental data.