Systemic lupus erythematosus in brief for famous questions in an exam.
systemic lupus erythematosus butterfly rash malar rash

A clinical photograph of a patient's face demonstrating dermatological and mucosal manifestations of Systemic Lupus Erythematosus (SLE). A classic malar rash (butterfly rash) is present, characterized by symmetric, erythematous-to-violaceous patchy lesions over the malar eminences and the bridge of the nose, notably sparing the nasolabial folds. Additionally, the perioral region exhibits significant erythema and mucosal involvement. The lips show evidence of hemorrhagic lesions, with visible blood crusting and a small fissure on the lower lip, suggestive of vasculitis or active systemic inflammation. These visual findings are key diagnostic indicators for SLE, particularly when associated with hematological abnormalities such as thrombocytopenia. The photograph provides a clear example of cutaneous lupus manifestations for clinical diagnosis and medical education.

This clinical dermatology photograph displays the classic malar or butterfly rash of systemic lupus erythematosus (SLE) on the central face. Modality is clinical photography using standard white-light illumination; frontal/anterior view; color-balanced, high-resolution capture to depict superficial erythema and patchy hyperemia across the malar eminences and nasal bridge. The rash forms a bilateral, 'butterfly' distribution that typically reaches the cheeks and bridge of the nose while sparing the nasolabial folds. The observed features include confluent to patchy, erythematous macules and plaques with uniform erythema, mild perivascular edema, and subtle textural change without overt crusting or scaling in this image. The clinical morphology is characteristic for acute cutaneous lupus erythematosus; photosensitivity may exacerbate lesions. This cutaneous finding is one of the diagnostic criteria for SLE when aligned with serologic abnormalities (ANA, anti-dsDNA) and systemic features; its presence increases diagnostic probability in a compatible patient. Differential considerations include rosacea, seborrheic dermatitis, contact dermatitis, and dermatomyositis rash; however, the malar distribution and nasal bridge involvement help distinguish lupus. Clinically, this image supports SLE workup and educational reference for recognizing lupus-associated facial rash in medical students, residents, and researchers; useful for pattern-recognition training and multimodal data repository indexing. This image emphasizes clinical-context interpretation and education.

Clinical photograph of a female patient presenting with characteristic dermatological manifestations of Systemic Lupus Erythematosus (SLE). A white arrow points to a malar rash, also known as a butterfly rash, which is characterized by fixed erythema and slight edema across the bridge of the nose and the malar eminences of the cheeks, typically sparing the nasolabial folds. A yellow arrow indicates a discoid rash on the upper chest, appearing as a well-demarcated, erythematous, raised papule/plaque with a slightly hyperpigmented or scarred center. The patient also has a nasogastric tube in place, secured with tape, and appears to have thin hair, potentially representing non-scarring alopecia. The clinical significance of these visual findings is their role as diagnostic criteria in rheumatology for SLE. The presentation is suitable for intermediate to advanced medical education regarding autoimmune connective tissue diseases and cutaneous lupus manifestations.
lupus nephritis histology wire loop lesions glomerulonephritis

A composite medical image featuring four panels (A-D) illustrating clinical, radiological, and pathological findings of a complex case involving Lupus Nephritis and severe Herpes Zoster. Panel A is a light microscopy image (H&E stain) of a renal biopsy showing glomerular endothelial and mesangial hypercellularity with characteristic 'wire-loop' lesions, consistent with Class IV-G Lupus Nephritis. Panel B presents axial chest CT scans (lung and mediastinal windows) displaying bilateral, scattered patchy and nodular opacities with ill-defined borders, suggestive of diffuse alveolar hemorrhage. Panels C and D are clinical photographs of the neck and chest region showing the progression of skin lesions. Panel C depicts the acute phase of Herpes Zoster, characterized by confluent, grouped vesicles on an intense erythematous base extending across multiple dermatomes. Panel D shows the same region post-antiviral treatment, demonstrating resolving lesions with dried-up exudate and crusting on a fading erythematous base. This figure serves as an educational resource for multi-organ manifestations in immunocompromised patients, specifically highlighting systemic lupus erythematosus complications and disseminated viral infection.

Imaging modality: light microscopy of renal tissue. A single glomerulus is shown in cross section from a renal cortical biopsy. The specimen is stained with Hematoxylin and Eosin (H&E) and viewed at high magnification. The glomerular tuft demonstrates increased cellularity within the capillary loops, consistent with endocapillary proliferation. Mesangial matrix appears expanded, and there are scattered infiltrating cells in the capillary lumens. Capillary lumina are variably narrowed, suggesting early glomerular inflammation. The basement membranes are not clearly visible as thickened in this field, and no overt segmental sclerosis or crescent formation is evident in this slice. The surrounding renal parenchyma shows mild tubulointerstitial involvement, including tubules with pale cytoplasm and interstitial edema, but the primary focus is the glomerulus. The staining highlights nuclei in blue and the extracellular matrix and cytoplasm in pink, typical of routine H&E preparation. This histopathology raises suspicion for a proliferative glomerulonephritis pattern, which can be seen in diseases such as postinfectious GN, IgA nephropathy, or lupus nephritis depending on ancillary tests. Clinically, findings may include hematuria, variable proteinuria, and potential decline in renal function; biopsy helps classify severity and guide therapy. Documentation of periglomerular inflammation and capillary loop involvement supports timely treatment decisions and assessment.
| System | Manifestation | Frequency |
|---|---|---|
| Constitutional | Fatigue, fever, weight loss | 90-95% |
| Mucocutaneous | Malar (butterfly) rash, discoid rash, photosensitivity, oral ulcers, alopecia | 70-80% |
| Musculoskeletal | Non-erosive arthritis/arthralgia | 75-90% |
| Renal | Lupus nephritis (proteinuria, hematuria, casts) | 50-60% |
| Hematologic | Hemolytic anemia, leukopenia, lymphopenia, thrombocytopenia | 50-65% |
| Serositis | Pleuritis, pericarditis | 40-60% |
| Neuropsychiatric | Seizures, psychosis, cognitive dysfunction, headache | 25-50% |
| Vascular | Raynaud's phenomenon, thrombosis (if aPL+) | 20-30% |
| Cardiac | Libman-Sacks endocarditis (non-infective, sterile verrucae on both sides of mitral valve) | 10-15% |
Serositis, Oral ulcers, Arthritis, Photosensitivity, Blood disorders, Renal disorder, ANA, Immunologic (anti-dsDNA/anti-Sm/aPL), Neurologic, Malar rash, Discoid rash
| # | Criterion | Key Detail |
|---|---|---|
| 1 | Malar rash | Fixed erythema over malar eminences, spares nasolabial folds |
| 2 | Discoid rash | Erythematous patches, keratotic scale, follicular plugging; may scar |
| 3 | Photosensitivity | Skin rash from unusual reaction to sunlight |
| 4 | Oral ulcers | Usually painless; oral or nasopharyngeal |
| 5 | Arthritis | Non-erosive, ≥2 peripheral joints |
| 6 | Serositis | Pleuritis or pericarditis |
| 7 | Renal disorder | Proteinuria >0.5 g/day or cellular casts |
| 8 | Neurologic disorder | Seizures or psychosis (without other cause) |
| 9 | Hematologic disorder | Hemolytic anemia, leukopenia <4000, lymphopenia <1000, or thrombocytopenia <100,000 |
| 10 | Immunologic | Anti-dsDNA, anti-Sm, or antiphospholipid antibodies |
| 11 | ANA | Positive ANA by immunofluorescence |
| Antibody | Frequency | Clinical Significance |
|---|---|---|
| ANA | 95-99% | Highly sensitive; screening test (negative ANA essentially rules out SLE) |
| Anti-dsDNA | 70% | High specificity for SLE; levels correlate with disease activity (especially nephritis) |
| Anti-Sm (Smith) | 25-38% | Most specific for SLE (low sensitivity, high specificity) |
| Anti-Ro/SSA | 49% | Neonatal lupus, congenital heart block, subacute cutaneous lupus (SCLE) |
| Anti-La/SSB | 35% | Seen with anti-Ro; protective against nephritis |
| Anti-histone | ~70% | Drug-induced lupus (but not exclusive) |
| Antiphospholipid (aPL) | 21% | Thrombosis, recurrent miscarriages (antiphospholipid syndrome) |
| Anti-ribosomal P | 10% | Neuropsychiatric lupus (psychosis) |
Key mnemonics: Anti-dsDNA = disease activity; Anti-Sm = specific; Anti-Ro = neonatal/SCLE; Anti-histone = drug-induced.
| Class | Name | Light Microscopy | Notes |
|---|---|---|---|
| I | Minimal mesangial LN | Normal | Mesangial immune deposits on IF only |
| II | Mesangial proliferative LN | Mesangial hypercellularity | Good prognosis; no specific Rx needed |
| III | Focal LN | <50% glomeruli involved | Active (A), chronic (C), or mixed |
| IV | Diffuse LN | ≥50% glomeruli involved | Most severe; worst prognosis; "wire-loop" lesions classic |
| V | Membranous LN | Subepithelial deposits | Heavy proteinuria/nephrotic syndrome |
| VI | Advanced sclerosing LN | ≥90% global sclerosis | End-stage; irreversible |

| Severity | Treatment |
|---|---|
| All patients | Hydroxychloroquine (HCQ) 200-400 mg/day - reduces flares, prevents damage, cardiovascular protection; mandatory for all SLE patients without contraindication |
| Mild disease | HCQ ± NSAIDs ± low-dose glucocorticoids |
| Moderate disease | Glucocorticoids (0.5 mg/kg/day) + immunosuppressive (azathioprine, methotrexate) |
| Severe/organ-threatening | High-dose GC ± IV cyclophosphamide (CYC) or mycophenolate mofetil (MMF) |
| Refractory | Rituximab, belimumab, voclosporin, anifrolumab |
| Clue | Think |
|---|---|
| Young woman + butterfly rash + arthritis + proteinuria | SLE |
| ANA positive + anti-dsDNA positive + low C3/C4 | Active SLE |
| Painless oral ulcers + photosensitivity | SLE |
| Positive ANA + anti-histone + no renal/CNS disease | Drug-induced lupus |
| Recurrent miscarriages + thrombocytopenia + prolonged aPTT | Antiphospholipid syndrome (secondary to SLE) |
| Neonatal complete heart block | Maternal anti-Ro antibody |
| "Wire-loop" lesion on renal biopsy | Class IV diffuse lupus nephritis |
| Libman-Sacks endocarditis | SLE (both sides of mitral valve, sterile verrucae) |
| False positive VDRL | Antiphospholipid antibodies in SLE |
