Table 1. Pertinent laboratory tests taken on hospital admission with their values and reference ranges.
Laboratory tests: serum vitamin B12, homocysteine, methylmalonic acid, intrinsic factor blocking antibody, and vitamin E, complete blood count, and urinalysis. Two-month follow-up of serum vitamin B12 >2,000 pg/mL. *Abnormal values; †clinically significant values.
| Laboratory Test | Value on Admission | Reference Range |
| Vitamin B12 | 285 pg/mL† | 232-1,245 pg/mL |
| Homocysteine | 17.1 umol/L*† | <11.4 umol/L |
| Methylmalonic Acid | 3,155 nmol/L*† | 87-318 nmol/L |
| Intrinsic Factor Blocking Antibody | Positive*† | Negative |
| Hb | 13.8 g/dL | 13.0-17.7 g/dL |
| MCV | 90.4 fL | 79-97 fL |
| Nucleated RBCs | 0 | 0-100 |
| Vitamin E | 12.1 mg/L | 5.7-19.9 mg/L |
| Urine Ketones | Trace* | Negative |
| Glucose | 121 mg/dL* | 74-106 mg/dL |