Small-sized vessel vasculitis with focal neurological sign

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Eiman Ghaffarpasand, M.D. [2]

Abbreviations: ABG= Arterial blood gas, ANA= Antinuclear antibody, ANP= Atrial natriuretic peptide, ASO= Antistreptolysin O antibody, BNP= Brain natriuretic peptide, CBC= Complete blood count, COPD= Chronic obstructive pulmonary disease, CRP= C-reactive protein, CT= Computed tomography, CXR= Chest X-ray, DVT= Deep vein thrombosis, ESR= Erythrocyte sedimentation rate, HRCT= High Resolution CT, IgE= Immunoglobulin E, LDH= Lactate dehydrogenase, PCWP= Pulmonary capillary wedge pressure, PCR= Polymerase chain reaction, PFT= Pulmonary function test.

Diseases Clinical manifestations Para-clinical findings Gold standard Additional findings
Symptoms Physical examination
Lab Findings Imaging Histopathology
Headache Fever Weight loss Arthralgia Claudication Bruit HTN Focal neurological disorder Biomarker CBC ESR Other CT scan Angiography Ultrasound/ Echocardiography Other
Small-Vessel Vasculitis ANCA-associated vasculitis Microscopic polyangiitis[1] + - - +/- - - - + Anti-PR3 antibody (C-ANCA) (40%), Anti-MPO antibody (P-ANCA) (60%) Leukocytosis, Normocytic anemia Proteinuria, Erythrocyte casts Suspected pancreatitis Mesenteric angiography for differentiating from polyarteritis nodosa - Bilateral nodular, and patchy opacities in CXR Glomerulonephritis with focal necrosis, crescent formation, and lack or paucity of immunoglobulin deposits Histological confirmation Rash, Hemoptysis 
Granulomatosis with polyangiitis (Wegener’s)[2] + +/- +/- - - - - + Anti-PR3 antibody (C-ANCA) (90%), Anti-MPO antibody (P-ANCA) (10%) Leukocytosis, Normochromic normocytic anemia Cr or BUN, Hypoalbuminemia Consolidation, Patchy or diffuse ground-glass opacities Occlusion or stenosis of LAD and RCA in coronary angiography - Single or multiple nodules and masses with cavitation in CXR Parenchymal necrosis, Granulomatous inflammation Histological confirmation Conjunctivitis,

Episcleritis,

Uveitis,

Optic nerve vasculitis

Eosinophilic granulomatosis with polyangiitis

(Churg-Strauss)[3]

+/- - - + - - - + Anti-MPO antibody (P-ANCA) (40%), Eotaxin-3 Eosinophilia, Anemia Cr or BUN, Proteinuria, Erythrocyte casts, ↑IgE levels Significant enlargement of peripheral pulmonary arteries Myocardial ischemia and infarction in coronary angiography Congestive heart failure (CHF) in echocardiography Extensive air-space opacities in CXR Small necrotizing granulomas with eosinophilic core surrounded by macrophages and epithelioid giant cells Histological confirmation Allergic rhinitisAsthma, Urticarial rash
Hydralazine-associated ANCA-associated vasculitis[4] - - - + - - - +/- Anti-MPO antibody (P-ANCA), Anti-histone antibodies Anemia - Cr or BUN, Hypoalbuminemia Bilateral pulmonary infiltrates Aneurysms or occlusions of the visceral arteries - - Pauci-immune necrotizing and crescentic glomerulonephritis Histological confirmation Sinusitis, Hemoptysis
Immune complex small-vessel vasculitis Hepatitis C virus-associated cryoglobulinemic vasculitis[5] +/- +/- + + - - + +/- HCV RNA, Cryoglobulins LeukocytosisAnemia Serum C4, Positive RF Increased hepatic echogenicity - Hepatomegaly, Splenomegaly Increased hepatic echogenicity in MRI Vasculitic skin, Antigen infilteration in lesions HCV RNA, Histological confirmation Palpable purpura, Microscopic hematuria
Cardiovascular disease Infective Endocarditis[6] + + + - - - - + NT-proBNP Normochromic-normocytic anemia Hyperglobulinemia, Cryoglobulinemia Metastatic infections, such as splenic infarct, renal infarcts, or psoas abscess - Vegetation, abscess, or new dehiscence of a prosthetic valvein echocardiography Vertebral osteomyelitis in MRI Vegetation or intracardiac abscess demonstrating active endocarditis Echocardiography (TTE) Janeway lesions, Osler nodes, Roth spots, Vertebral osteomyelitis
Leukocytoclastic Vasculitis[7] + - - + - - - + IgM, IgA, IgG Leukocytosis, Anemia Hypocomplementemia - Vascular stenosis and obstruction in visceral angiography - - Perivascular inflammatory infiltrate of neutrophils with leukocytoclasia (releasing nuclear debris) Histological confirmation Palpable purpura, Petechiae 
Pulmonary disease Non-Small Cell Lung Cancer[8] - +/- + - - - - +/- EGFR, ROS1, EML4-ALK,  PD-L1 Leukocytosis, Anemia Hypercalcemia, Hyponatremia Pulmonary lesion or mass - Pulmonary marginal lesions Staging and response to treatment in PET-CT Adenocarcinoma, Squamous cell carcinoma High resolution CT-scan Cough, Hemoptysis
Small Cell Lung Cancer[9] - +/- + - - - - +/- p53, Thyroid transcription factor-1 (TTF1) Anemia Hyponatremia Large hilar mass with bulky mediastinal adenopathy - Endobronchial ultrasound (EBUS) Standard staging Spindled cells with dark nuclei, scant cytoplasm, and fine, granular nuclear chromatin High resolution CT-scan Cough, Hemoptysis
Renal disease Acute Poststreptococcal Glomerulonephritis[10] - - - + - - + +/- Antistreptolysin-O (ASO) titers Leukocytosis Hypocomplementemia - - Normal to slightly enlarged kidneys Central venous congestion in a hilar pattern in CXR Hypercellularity of endothelial and mesangial cells, Infiltration of the glomerular tuft with polymorphonuclear cells Histological confirmation Hematuria
Hematologic disease Hemolytic-Uremic Syndrome[11] + + - + - - + + C5b-9, ADAMTS13 Anemia, Thrombocytopenia, Reticulocytosis  Lactate dehydrogenase (LDH), Hypercalcemia  Thalami, brainstem, or cerebellum abnormality Cerebral microangiopathy or hypertension Hypoechoic kidney  Abnormal hyperintensity in the brain cisterns in MRI Microthromboses include fibrin thrombi that may occlude the glomerular tuft Clinical findings coupled with laboratory abnormalities Hematuria, Proteinuria 
Chronic Lymphocytic Leukemia (CLL)[12] + + + + +/- - - +/- CD5, CD19, CD20, IgVH Absolute lymphocytosis, Smudge cells Flow cytometry Staging - - - Large atypical cells, cleaved cells, and prolymphocytes  Chromosomal and genetic testing Easy bruising
Multiple Myeloma[13] + - + + + + +/- +/- Ig light chain Anemia, Thrombocytopenia, Leukopenia Bone marrow aspiration and biopsy, ↑Cr Osseous involvement and lytic lesions Peripheral zone of increased vascularity in lesions - Punched-out lesion in skull X-ray Clonal proliferation of plasma cells Protein electrophoresis plus conventional X-rays Constipation
Non-Hodgkin Lymphoma[14] + + + + +/- +/- +/- +/- MYCBCL2BCL6, and TP53 Lymphocytosis, Anemia, Thrombocytopenia Lactate dehydrogenase (LDH), Hypercalcemia  Enlarged lymph nodes, Hepatosplenomegaly, Filling defects in the liver and spleen - Hepatosplenomegaly Mediastinal lymphadenopathy Small cleaved or noncleaved, intermediate, or large cell with a follicular or diffuse pattern Surgically excised tissue biopsy Easy bruising, Testicular mass, Skin lesion
Serum Sickness[15] + + - +/- +/- - - +/- IL-1, IL-6, TNF Leukopenia  Polyclonal gammopathy, ↑Cr, Cryoglobulinemia - - - - Arteritic lesions are focal, necrotizing, and inflammatory involving all layers of the artery Clinical findings coupled with laboratory abnormalities Hematuria, Skin rash
Disseminated Intravascular Coagulation[16] +/- + - +/- - - + + Fibrin degradation product (FDP) Thrombocytopenia, Schistocytes D-dimer, aPTT and PT Intracranial hemorrhage - - - Ischemia and necrosis due to fibrin deposition in small and medium-sized vessels Clinical findings coupled with laboratory abnormalities  Acral cyanosis, Hemorrhagic skin infarctions
Idiopathic Thrombocytopenic Purpura[17] + +/- - + - - - + FC gamma receptors (FCGR) IIb Anemia, Thrombocytopenia - HIV, ANA R/O other causes - R/O splenomegaly - Increased number of normal morphologic megakaryocytes Clinical findings coupled with thrombocytopenia Easy bruising, Purpura
Systemic disease Sarcoidosis[18] + + + + - - - +/-  IL-2 and IFN-γ Mild anemia ACE, ↑1, 25-dihydroxyvitamin D Active alveolitis or fibrosis - Hepatosplenomegaly Bilateral hilar adenopathy Noncaseating granulomas (NCGs) Histological confirmation Heart block, Ocular lesion
Legionella Infection[19] + + + + - - - +/- Inflammatory cytokines Leukocytosis with left shift, Thrombocytosis D-dimer, FDP, Hyponatremia Pleural effusion - - Nonspecific and indistinguishable CXR Intra-alveolar inflammation, Microabscesses in the parenchyma Sputum culture Cough, Diarrhea
Systemic lupus erythematosus[20] + + + + - - + + Anti dsDNA, ANA  Leukopenia, Lymphopenia, Anemia, Thrombocytopenia Cr or BUN,

ALT or AST, Proteinuria

Interstitial lung disease, Pneumonitis, Pulmonary emboli, Alveolar hemorrhage Aneurysms Pericardial effusion, pulmonary hypertension, or verrucous Libman-Sacks endocarditis in echocardiography Central nervous system (CNS) lupus white-matter changes in MRI Staging lupus nephritis Anti-dsDNA antibody test Skin rashes or photosensitivity

References

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