Additional investigations
| CXR | Lungs and pleural recesses are clear. Normal mediastinal contours. | |||||
| CTPA | There is no large volume of ground-glass change, consolidation and no pleural fluid. There are no classical features of COVID-19. | |||||
| Blood film | Polychromasia. Rare basophilic stippling seen. Platelet anisocytosis with some large forms. Some neutrophil hypersegmentation | |||||
| Parvo virus | IgG positive, IgM negative | |||||
| Mycoplasma IgM | Negative | |||||
| COVID-19 PCR | Positive | |||||
| ANA | <400 weakly positive | Presumed false positive | ||||
| ANCA | Negative | |||||
| Anti-GBM | Negative | |||||
| CK | 85 U/L | |||||
| DAT | Anti-C3D positive 2+ | Anti IgG negative Anti IgA negative Anti IgM negative AntiC3c negative | All others negative | |||
| Reticulocyte count × 109/L | 124 | 206 | 259 | 306 | ||
| Haptoglobin, g/L | <0.30 | <0.30 | ||||
| Urine PCR | Normal | |||||
| Ferritin, μg/L | 2452 | Acute phase reactant | ||||
| B12, ng/L | 420 | |||||
| Folate, μg/L | 8.9 | |||||
| G6PD, U/gHb | 9.3 | |||||
| Free kappa/lambda light chain ratio | 26.97/26.60 1.01(normal) | No evidence of myeloma | ||||
ANA, anti-nucleur antibody; ANCA, antineutrophil cytoplasmic antibody; CK, cretainine kinase; CTPA, CT pulmonary angiogram; CXR, chest X-Ray; DAT, direct antiglobulin test; GBM, glomerular basement membrane ; G6PD, glucose-6-phosphate dehydrogenase; Hb, haemoglobin.