imaging: multiple pulmonary cavitary lesions
TRANSCRIPT
• Mr.rajan 38 yr old smoker• C/O swelling all over the body- past 4 months
5months back-he developed1. Cough-productive,scant mucoid sputum 2. chest pain-diffuse pricking increases with cough3. Breathlessness-Class iii(NO orthopnoea/PND)• No chest pain/palpitation• No haemoptysis/fever• No oliguria/dysuria/haematuria
On Examination
• Pt conscious oriented • Afebrile• No pallor /icterus / cyanosis/clubbing• B/L pitting pedal edema• Not dyspnoeic• No generalised lymphadenopathy• JVP not elevated• PR 86/min BP 110/70mm Hg
INFECTIVE CAUSES• mycobacterial –• Bacterial- staph aureus,klebsiella,psuedomonas,nocardiosis,
anaerobes• Fungal- aspergillus,blastomycosis,coccioidomycosis,
histoplasmosis• Septic emboli• Lung abscess
DIFFERENTIALSFOR MULTIPLE CAVITARY LESIONS
TRAUMA • Pulmonary contusion• Septic emboli• Lung abscessGRANULOMATOUS, INFLAMMATORY DISORDERS• Necrotizing sarcoid granulomatosis/lung• Wegeners granulomatosisCOLLAGEN VASCULAR DISORDERS• Polyarteritis nodosa• Rheumatoid lung diseaseVASCULAR DISORDERS• Pulmonary infarction with cavitationNEOPLASTIC DISORDERS• Lymphomas• Metastatic lung disease• carcinoma of lung
LOOKING AT CAVITIES• What is the anatomic distribution?
– Is It single or multiple? – If multiple , are they focally located or diffusely seen in
multiple lobes of both lungs?
• Is are the characteristics of the cavity?– Is the cavity wall thick or thin?– Is the interior lining nodular, shaggy, or smooth?
• Are there any other associated radiographic abnormalities?
INVESTIGATIONS
• Urine routine-protein 2+, 3-5 RBCs• TC 13800• DC P66 L 32 E2• ESR 56mm/hr• Platlets 1,45,000• Hb 12.8 g• Urea -17 mg• Creatinine 0.8 mg
• HIV – NR• SPUTUM AFB negative• Sputum c/s no growth• RF – neg• ANA – Neg• CRP elevated• ENT OPINION : Polyp from Lt middle
meatus, VLS-normal
FNAC OF A NODULE(CT GUIDED)
POSSIBILITIES
• 1.WEGENER’S GRANULOMATOSIS• 2.PULMONARY LANGERHANS CELL
HISTIOCYTOSIS
P-ANCA … POSITIVE
Approximately 90% of patients with active Wegener’sgranulomatosis have a positive antiproteinase-3 ANCA.
A small percentage of patients with Wegener’s granulomatosis may have antimyeloperoxidase rather than antiproteinase-3 antibodies.
Points in favour
• Renal involvement• P-ANCA positivity• Radiolgical features• Paranasal sinus involvement
Wegener granulomatosisWegener granulomatosis• Granulomatous, necrotizing, small & medium vessel vasculitis
• Any age (40-55 yrs.)
• Frequency of 3 per 100,000 persons
TRIAD RENAL-Microscopic hematuria, proteinuria, and rapidly progressive RF UPPER AIRWAYS- recurrent / nonresolving sinusitis, epistaxis, nasal
septal perforation (saddle nose deformity) LOWER AIRWAY- subglottic stenosis. Single or multiple
cavitating/noncavitating Pulmonary nodules or diffuse alveolar hemorrhage
Wegener granulomatosisWegener granulomatosis• Skin rash, migratory arthritisSkin rash, migratory arthritis
• Ocular involvement (scleritis, corneal ulceration,orbital dis.)Ocular involvement (scleritis, corneal ulceration,orbital dis.)
• Mononeuritis multiplex or CNS involvement with or without Mononeuritis multiplex or CNS involvement with or without pachymeningitispachymeningitis
• ANCA (180pt., 96%with severe dis.,83%with limited dis.)ANCA (180pt., 96%with severe dis.,83%with limited dis.)
• Lung biopsy yield 91% of casesLung biopsy yield 91% of cases
• Upper airway biopsy yield only 21%of casesUpper airway biopsy yield only 21%of cases
• Renal biopsy:focal, segmental necrotizing, crescentic Renal biopsy:focal, segmental necrotizing, crescentic glomerulonephritis with few to no immune complexes glomerulonephritis with few to no immune complexes
ANCA
• ANCA plays a central role• Antibodies directed against certain cytoplasmic
proteins in neutrophils and monocytes• Two major categories based on IF– C & P ANCA• Present in high percentage in systemic vasculitis
Kallenberg CGM et al. (2006) Mechanisms of Disease: pathogenesis and treatment of ANCA-associated vasculitides Nat Clin Pract Rheumatol 2: 661–670 doi:10.1038/ncprheum0355
Figure 1 Cytoplasmic components of ethanol-fixed neutrophils, stained by indirect immunofluorescence, in a serum sample from a patient with active
Wegener's granulomatosis and antineutrophil cytoplasmic autoantibodies to proteinase 3
RENO-PULMONARY SYNDROMES1.ANTI-GBM ANTIBODIES:
Goodpasture’s syndrome2.ANCA-POSITIVE VASCULITIS• Wegener’s granulomatosis• Microscopic polyangiitis• Churg–Strauss syndrome3.ANCA-NEGATIVE VASCULITIS• Henoch–Schönlein purpura• Mixed cryoglobulinaemia• Behçet’s disease• IgA nephropathy4.INFECTIONS
5.DRUGS• Propylthiouracil• D-Penicillamine• Hydralazine• Allopurinol6.RHEUMATIC DISEASES (immune complexes)• Systemic lupus erythematosus• Scleroderma• Polymyositis• Rheumatoid arthritis• Mixed collagen vascular disease