Table 1.
Lab work in diagnosis of the etiology of the recurrent aphthous stomatitis.
| CBC | WBC | 9.5 th/μL | 3.8–10.8 th/μL |
| Hgb | 13.5 g/dL | 11.7–15.5 g/dL | |
| Hct | 42.1% | 35–45.0% | |
| MCV | 86.1 fL | 80–100 fL | |
| Platelet | 301 th/uL | 7.5–12.5 th/uL | |
| Absolute lymphocyte | 3891 cells/uL | 200–950 cells/uL | |
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| CMP | Na | 143 MEQ/L | 135–146 MEQ/L |
| K | 5.0 MEQ/L | 3.5–5.3 MEQ/L | |
| Cl | 106 MEQ/L | 98–110 MEQ/L | |
| CO2 | 32 MEQ/L | 20–32 MEQ/L | |
| Albumin | 4.4 g/dL | 3.6–5.1 g/dL | |
| Bilirubin | 0.3 g/dL | 0.2–1.2 g/dL | |
| AST | 27 IU/L | 10–35 IU/L | |
| ALT | 37 IU/L | 6-29 IU/L | |
| BUN | 17 mg/dL | 7–25 mg/dL | |
| Creatinine | 0.83 mg/dL | 0.5–1.10 mg/dL | |
| Calcium | 12.1 mg/dL | 8.6–10.2 mg/dL | |
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| Micronutrients/vitamins | B12 | 484 pg/mL | 254–1320 pg/mL |
| B1 | <7 nmol/L | 8–30 nmol/L | |
| B6 | <2 ng/μL | 2.1–21.7 ng/μL | |
| B2 | 43.5 nmol/L | 6.2–39 nmol/L | |
| B3 | <20 ng/mL | <20–30000 ng/mL | |
| Vitamin D 25 (OH) | 19 ng/mL | 30–100 ng/mL | |
| Transthyretin | 27.7 mg/dL | 20–40 mg/dL | |
| Folate | 13.1 ng/mL | 3.1–17.5 ng/mL | |
| TIBC | 370 mcg/dL | 250–450 mcg/dL | |
| Ferritin | 147.8 ng/mL | 8–252.0 ng/mL | |
| Iron | 48 ng/mL | 50–170 ng/mL | |
| Zinc | 53 mcg/dL | 60–130 mcg/dL | |
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| Serologies/autoimmune work up | ANCA | Negative | Negative |
| ANA | Negative | Negative | |
| Rheumatoid factor | Negative | Negative | |
| TTG-IGA | Negative | Negative | |
| Lupus panel | Negative | Negative | |
| SSA/SSB | Negative | Negative | |
| T4 | 1.02 ng/dL | 0.76–1.46 ng/dLf | |
| TSH | 1.12 mIU/L | 0.358–3.740 mIU/L | |
| A1c | 6.2% | <5.5% | |
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| Infectious work up | HIV | Negative | Negative |
| HSV 1 | Positive abs | Negative | |
| Hepatitis C ab | Negative | Negative | |
| H pylori (stool antigen) | Negative (after eradication) | Negative | |
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| Lipid Panel | Total cholesterol | 217 mg/dL | <200 mg/dL |
| HDL | 67 mg/dL | >50 mg/dL | |
| Triglyceride | 263 mg/dL | <150 mg/dL | |
CBC: complete blood count, WBC: white blood cell, Hgb: hemoglobin, Hct: hematocrit, MCV: mean corpuscular volume. CMP: comprehensive metabolic panel. AST: aspartate aminotransferase. ALT: alanine transaminase. TIBC: total iron-binding capacity. ANCA: antineutrophil cytoplasmic antibodies. ANA: antinuclear antibodies. TTG-IGA: tissue transglutaminase-immunoglobulin A. SSA/SSB: Sjögren's-syndrome-related antigen A/Sjögren's-syndrome-related antigen B. TSH: thyroid stimulating hormone. HIV: human immunodeficiency virus.