Chronic Atrophic Gastritis Presenting as Hemolytic Anemia due to Severe Vitamin B12 Deficiency

Table 1

Laboratory data.

Lab	Value	Reference range
WBC	2.4	4.5–11.0 10  3/uL
ANC	1.2	1.8–8.0 10  3/uL
HGB	4.9	13.2–17.5 g/dL
HCT	14.9	40.0–53.0%
MCV	98.7	80.0–100.0 fL
Platelet	57	140–450 10  3/uL
Glucose	93	70–99 mg/dL
Na	138	136–145 mmol/L
K	4.4	3.5–5.2 mmol/L
Chloride	105	96–110 mmol/L
Carbon dioxide	21	24–31 mmol/L
BUN	14	5–25 mg/dL
Cr	1.15	0.61–1.24 mg/dL
AST	105	10–42 U/L
ALT	55	10–60 U/L
ALP	29	38–126 U/L
Total bilirubin	4.2	0.2–1.3 mg/dL
Direct bilirubin	0.5	0.0–0.2 mg/dL
Troponin	0.01	<0.08 ng/mL
LDH	6392	91–200 U/L
Haptoglobin	<6	30–225 mg/dL
Reticulocyte count	1.38	0.40–2.50%
Direct coombs IgG	Positive	Negative
Ferritin	304.3	24–336 ng/mL
Serum iron	81	45–180 ug/dL
TIBC	227	260–480 ug/dL
Vitamin B12	<50	180–914 pg/mL
Folate	22	>4.0 ng/mL
Homocysteine	42.6	5.0–15.0 umol/L
Intrinsic factor antibody	Negative	Negative
Antiparietal cell	20.7	0.0–20.0 units = negative
Antibodies (first test)		20.1–24.9 = Equivocal
Antiparietal cell	19.2	0.0–20.0 units = negative
Antibodies (second test)		20.1–24.9 = Equivocal