01 November 2025
: Case report 
Post-COVID-19-Associated Asymptomatic Sarcoidosis with Hypercalcemia and Renal Dysfunction: A Case Report and Literature Review
Challenging differential diagnosis, Rare disease, Rare coexistence of disease or pathology
Mrudula Thiriveedi
ABDEF 1*, Hersh Patel DF 2, Caitlin Curran BEF 2, Siddharth Patel DEF 1, Sujatha Baddam DEF 3, Rafik ElBeblawy DEF 1, Punuru J. Reddy ADE 1
DOI: 10.12659/AJCR.950045
Am J Case Rep 2025; 26:e950045
Table 1 Laboratory values on admission.
| Laboratory data | Measured value | Reference range |
|---|---|---|
| White blood cell count | 5.49 | 4.8–10.8×1000 cells/microL |
| Hemoglobin | 10.1 | 13.5–17.5 g/dL |
| Mean corpuscular volume (MCV) | 79.2 | 80–100 fL |
| Platelet count | 207 | 130–400×1000 cells/microL |
| Percent reticulocyte count | 0.8 | 0.8–2.1% |
| Peripheral blood smear | Normal | |
| Sodium | 140 | 136–145 mmol/L |
| Potassium | 3.8 | 3.5–5.1 mmol/L |
| Chloride | 104 | 98–107 mmol/L |
| Bicarbonate | 26 | 22–29 mEq/L |
| Blood urea nitrogen | 17 | 8–22 mg/dL |
| Creatinine | 2 | 0.7–1.2 mg/dL |
| Glucose | 98 | 70–104 mg/dL |
| Calcium | 13.3 | 8.8–10.2 mg/dL |
| Total bilirubin | 0.46 | 0.20–1 mg/dL |
| Aspartate transaminase (AST) | 14 | 10–30 U/L |
| Alanine transaminase (ALT) | 12 | 10–36 U/L |
| Alkaline phosphatase (ALP) | 135 | 32–104 U/L |
| Vitamin D-25 hydroxy | 55 | 30–100 ng/mL |
| Parathyroid hormone (PTH) | 15 | 15–65 pg/mL |
| Vitamin D 1,25 hydroxy | 108 | 18–78 pg/ml |
| Angiotensin-converting enzyme (ACE) | 70 | 16–85 U/L |