HRCT is investigation of choice for?
Correct Answer: Interstitial lung disease
Description: Ans. D. Interstitial lung disease.HRCT Lungs:# BASIC PRINCIPLE- Bone algorithm (Basic Principle)6- 1 mm sections 6- Narrow beam collumation 6- Small field of view6- Large matrix size# INDICATIONS (Investigation of choice for)- LUNGS:* Interstitial Lung Disease (ILD)6* Bronchiectasis ("Signet-ring" sign) 6* EmphysemaILD: Radiologic patterns of INTERSTITIAL LUNG DISEASES (ILD) | |||||Reticular patternNodular patternReticulonodularSeptal "Groundglass"pat"Tree-in-bud"|||||# Fibrosing alveolitis# Asbestosis# Sarcoidosis# Chro allergic alveolitis# LCH# LAM# Silicosis# CWP# Sarcoidosis# TB# Subacute EAA# LCH# Sarcoidosis# Lymphangitis Ca# Interst pulm edema# Lymphangitic Ca# P. jerovecii Atyp TB# NSIP# Pulm h'ge# Alveolar proteiniosis# Eosinophilic pneumoEndo TB# Collagen vas ds# Ex. Allergic alveolitis HRCTDisease1. Reticular pattern# Many ILDs2. Multiple cysts# Lymphangioleomyomatosis (LAM)# Pulmonary Histiocytosis3. Lepidote growth# Bronchoalveolar cancer4. Crazy paving# Alveolar proteinosis > silocosis5. "Tree-in-bud" appearance# Endobronchial TB and# Atypical mycobacterial TB6. 'Ground glass' hazzinessEarliest radiological finding of any ILD7. Bilateral perihitar ground glass haziness, especially in a immunocompromised individualPCP | | |ILDs primarily affecting UZs ILDs primarily affecting LZs# Extrensic ellergic alveolitis# Coal workers pneumoconiosis# Langerhan's disease# Ankylosing spondylitis# Sarcoidosis# Silicosis (Mnemonic: E-CLASS) # Fibrosing alveolitis# Asbestosis (bilat basal affection)# Interstitial pulmonary edema# Lymphangitis carcinomatosa (Mnemonic: FAIL)Additional Educational points:Role of CT, PET scan, Bronchoscopy and Image guided biopsy in Pulmonary Nodule evaluation: Investigation for SPNSensitivitySpecificityAccuracyComment1.Transthoracic FNAB95-100%91%--# Gives tissue diagnosis;# Best for evaluating SPN.2.PET (FDG) scan92-100%52-100%94%# Best non-invasive tool for evaluating SPN.3.CECT98%73%85%# If a chest x-ray shows a lung nodule, usually CECT is best to roughly know whether it is infective/congenital/ neoplasm. And main advantage of CT is it maps the lesion, apart from characterizing the lesion.# Further CT is best to guide lung & mediastinal biopsies.4.HRCT---# Not primarily useful for solitary lung nodule evaluation.# It is for diffuse or interstitial lung diseases.5.MRI---# Not much preferred for chest imaging except for pathologies like Pancoast tumor; Vascular lesions, Neurogenic tumors, etc.6.Bronchoscopy---# Should be used for central lesions (if at all) and endobronchial lesions.# Can be used if CT chest is normal.SPN=Solitary Pulmonary Nodule.
Category:
Radiology
Get More
Subject Mock Tests
Practice with over 200,000 questions from various medical subjects and improve your knowledge.
Attempt a mock test nowMock Exam
Take an exam with 100 random questions selected from all subjects to test your knowledge.
Coming SoonGet More
Subject Mock Tests
Try practicing mock tests with over 200,000 questions from various medical subjects.
Attempt a mock test now