21 June 2025
: Case report 
Diffuse Alveolar Hemorrhage as the First Presentation of Systemic Lupus Erythematosus: A Case Report
Unusual clinical course, Challenging differential diagnosis, Management of emergency care
Selma Later ABCDEFG 1*, Muzan Abdelbagi
ABCDEFG 1, Amjad Zaaroura ABCDEFG 1, Reda Mohamed Sherif ABCDEF 2, Khaled Mohammed Yehia Alsayed Abdel Salam Aldebese ABCDEF 2, Mostafa Mohamed Eisa ABCDEF 2, Mohamed H. Badawy ABCDEFG 2
DOI: 10.12659/AJCR.947096
Am J Case Rep 2025; 26:e947096
Table 1 Laboratory results and corresponding reference values.
| Laboratory test | Value | Reference range |
|---|---|---|
| White blood cells (×10/L) | 36.47 | 4–10 |
| Hemoglobin (g/dL) | 7.3 | 12–15 |
| Hematocrit (%) | 23 | 36–46 |
| Mean corpuscular volume (fL) | 96.2 | 80–100 |
| Mean corpuscular hemoglobin concentration (g/dL) | 31.7 | 31.5–34.5 |
| Reticulocyte percentage | 7.6% | |
| Lactate dehydrogenase (IU/L) | 450 | |
| Platelets (10/μL) | 158 | 150–450 |
| Partial thromboplastin time (s) | 30 | 25–35 |
| Prothrombin time (s) | 15.3 | 9–14 |
| Erythrocyte sedimentation rate (mm/h) | 41 | 0–20 |
| D-dimer (mg/L) | 8.15 | 0–0.5 |
| Urea (mmol/L) | 14.12 | 2.5–6.4 |
| Creatinine (μmol/L) | 323 | 53–97 |
| Troponin-I (ng/L) | 394.49 | 0–60 |
| Pro-brain natriuretic peptide | >35 000 | 0–125 |
| C-reactive protein (mg/L) | 33.9 | 0–3 |
| Procalcitonin (ng/mL) | 12.48 | 0–1 |
| Arterial blood gas results | ||
| pH arterial | 7.10 | 7.35–7.45 |
| pCO2 arterial (mm Hg) | 26.3 | 32–48 |
| pO2 arterial (mm Hg) | 46.6 | 83–108 |
| Lactate (mmol/L) | 11.4 | 0.5–2.2 |
| Bicarbonates (mmol/L) | 8.9 | (22–26) |