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Abnormal Chest xray

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About common abnormalities you see in chest xrays like SPN

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Abnormal Chest xray

  1. 1. ABNORMAL CHEST XRAY
  2. 2. • Lung Parenchyma • Pleura • Hilum • Mediastinum • Diaphragm • Chest wall and bones
  3. 3. Parenchymal diseases Increased radiographic density Predominantly Airspace Predominantly Interstitial tissueDecreased radiographic density
  4. 4. ALVEOLAR DISEASE VS INTERSTITIAL DISEASE
  5. 5. ALVEOLAR DISEASE
  6. 6. CONSOLIDATION • Alveolar space filled with inflammatory exudate • Interstitium and architecture remain intact • The airway is patent • Radiologically:This transcribes to ; • A density corresponding to a segment or lobe • Airbronchogram • No significant loss of lung volume
  7. 7. • Definition Visualization of bronchi within parenchymal consolidation. • Findings Branching lucencies surrounded by consolidative opacity. • Differential non-obstructive atelectasis pneumonia pulmonary edema hemorrhage bronchoalveolar carcinoma lymphoma • Significance Excludes a pleural or mediastinal lesion AIR BRONCHOGRAM SIGN
  8. 8. AIR BRONCHOGRAM SIGN
  9. 9. BULGING FISSURES SIGN • The bulging fissure sign refers to LOBAR CONSOLIDATION where the affected portion of the lung is expanded. • The most common infective causative agents are Klebsiella pneumoniae Streptococcus pneumoniae Pseudomonas aeruginosa Staphylococcus aureus
  10. 10. SILHOUETTE SIGN • An intra-thoracic radio- opacity, if in anatomic contact with a border of heart , aorta or diaphragm , will obscure that border. • An intra-thoracic lesion not anatomically contiguous with a border or a normal structure will not obliterate that border. Right middle lobe disease
  11. 11. SILHOUETTE SIGN
  12. 12. APPLICATION
  13. 13. ITS NOT JUST IN PNEUMONIA
  14. 14. • In a small percentage of normal individual, the right heart border may not be seen • A depressed sternum can produce loss of the right heart border, an appearance which mimics middle lobe pneumonia .This is because: (a) the depressed sternum pushes the heart posteriorly and to the left; and (b) bunching of the soft tissues of the deformed chest wall causes an increase in density. PITFALLS
  15. 15. • The absence of a silhouette sign can tell you where a shadow (consolidation or mass) is NOT situated. ITS NOT JUST THE PRESENCE
  16. 16. RT. MIDDLE LOBE PNEUMONIA Indistinct borders, air bronchograms, and silhouetting of the right heart border.
  17. 17. COLLAPSE In collapse air is absorbed and not replaced in contrast to consolidation.
  18. 18. • The signs of lobar or pulmonary collapse can be divided into 1) Direct 2) Indirect COLLAPSE
  19. 19. Direct signs are; • Opacity of the affected lobe(s); • Crowding of the vessels and bronchi within the collapsed area • Displacement or bowing of the fissures . Indirect signs are: • Compensatory hyperinflation of the normal lung • Displacement of the mediastinal structures toward the affected side • Displacement of the ipsilateral hilum which changes shape • Elevation of the ipsilateral hemidiaphragm • Crowding of the ribs on the affected side COLLAPSE
  20. 20. LEFT LUNG COLLAPSE
  21. 21. Golden S Sign: • Seen in case of collapse due to a hilar mass • The mass gives a convexity to the concave displaced fissure COLLAPSE
  22. 22. DIFFERENCES COLLAPSE  Volume loss.  Associated ipsilateral shift  Linear, wedge shaped  Apex at hilum  Air bronchograms are not seen CONSOLIDATION  Normal or increased volume  No shift, or if present then contrlateral  Consolidation, air space process.  Not centred at hilum  Air bronchograms are seen
  23. 23. INTERSTITIAL DISEASE
  24. 24. • Non-homogenous • Various patterns are : Linear Septal Lines Milliary Shadow Reticulonodular, Nodular Honeycoomb Shadowing Cystic Peribronchial Cuffing DIFFUSE LUNG DISEASE
  25. 25. RETICULAR/LINEAR SHADOWING • Appears as a fine irregular network of linear opacities surrounding air –filled lung.
  26. 26. RETICULAR/LINEAR SHADOWING Fine reticular pattern Coarse reticular pattern
  27. 27. RETICULONODULAR SHADOWING • More common than reticular or nodular shadowing alone. • The nodules are less than 1cm in diameter. • Ill defined and irregular in outline.
  28. 28. CAUSES OF DIFFUSE BILATERAL RETICULONODULAR SHADOWING •Infections – Fungal, viruses, mycoplasma •Pneumoconiosis – Coal workers pneumoconiosis, silicosis,asbestosis •Collagen vascular diseases – SLE, Dermatomyositis, Scleroderma, rheumatoid lung •Cardiac – Pulmonary oedema, hemosiderosis , •Miscellaneous: Idopathic interstitial fibrosis, extrinsic allergic alveolitis, drugs, sarcoidosis, amyloidosis, alveolar proteinosis, lymphangitis carcinomatosis
  29. 29. HONEYCOMB SHADOWING • Air–containing spaces with thick walls that are lined with bronchiolar epithelium and fibrous tissue. • Due to destruction of alveoli and loss of acinar architecture • Associated with pulmonary fibrosis. • Usually 5-10 mm in size
  30. 30. LINEAR AND BAND SHADOWS • Normal structures such as the blood vessels and fissures form linear shadows within the lung fields. • However, there are many disease processes which may result in linear shadows. • Linear shadows are less than 5 mm wide, • Band shadows are greater than 5 mm thick .
  31. 31. • Pulmonary infarct • Sentinel Lines • Thickened Fissures • Pulmonary and pleural scars • Curvilinear shadows(Bullae/Pneumatocoele) • Plate atelectasis ( Fleischner Lines) etc CAUSES
  32. 32. SENTINEL LINES • Mucus-filled bronchi • Coarse lines lying peripherally in contact with the pleura and curving upwards. • Often left-sided and associated with left lower lobe collapse. • They may develop due to kinking of bronchi adjacent to the collapse.
  33. 33. KERLEY LINES Kerley's A lines (arrows) : • Linear opacities extending from the periphery to the hila • Due to distention of anastomotic channels between peripheral and central lymphatics. Kerley's B lines (white arrowheads) : • Short horizontal lines situated perpendicularly to the pleural surface at the lung base • Due to edema of the interlobular septa. Kerley's C lines (black arrowheads): Reticular opacities at the lung base representing superimposed Kerley's B lines.
  34. 34. KERLEY LINES B A C
  35. 35. • Pulmonary oedema • Pneumoconiosis • Infections (viral, mycoplasma) • Lymphangiectasia • Mitral valve disease • Lymphangitis carcinomatosis • Interstitial pulmonary fibrosis • Lymphatic obstruction • Congenital heart disease • Sarcoidosis • Alveolar cell carcinoma • Lymphangiomyomatosis • Pulmonary venous occlusive disease . CAUSES OF KERLY LINES
  36. 36. MILIARY PATTERN • Small discrete opacities • 2-4 mm in diameter • MC in Tuberculosis
  37. 37. OLD PLEURAL AND PULMONARY SCARS • Scars are unchanged in appearance on serial film. • Thin linear shadow often with associated pleural thickening and tenting of the diaphragm. • Apical scarring is a common finding with healed tuberculosis, sarcoidosis and fungal disease
  38. 38. THICKENED BRONCHIAL WALLS • Parallel TRAMLINE shadows • Ring shadows on end-on view • They are common finding in Bronchiectasis, Recurrent asthma, Bronchopulmonary aspergillosis , Pulmonary oedema Lymphangitis carcinomatosis.
  39. 39. • Discrete, well-marginated, rounded opacity • Less than or equal to 3 cm in diameter • Completely surrounded by lung parenchyma, does not touch the hilum or mediastinum, • Not associated with adenopathy, atelectasis, or pleural effusion. • Lesions larger than 4 cms are treated as malignancies until proven otherwise. SOLITARY PULMONARY NODULES
  40. 40. SOLITARY PULMONARY NODULES A right lower lobe solitary pulmonary nodule that was later identified as a hamartoma. Right lower lobe nodule later confirmed to be primary pulmonary lymphoma
  41. 41. SOLITARY PULMONARY NODULES • Intrapulmonary mass forms an acute angle with the lung edge. • Extrapleural and mediastinal masses form obtuse angles . • A nodule is assessed for its size, shape and outline and for the presence of calcification or cavitation. . Extra pleural Mass
  42. 42. SOLITARY PULMONARY NODULES • Carcinomas often have irregular, spiculated or notched margins. • Calcification favours a benign lesion although a carcinoma may arise coincidentally at the site of an old calcified focus. • Calcified metastases are rare, the primary tumour being usually an osteogenic or chondrosarcoma. • Granulomas frequently calcify and are usually well defined and lobulated.
  43. 43. SOLITARY PULMONARY NODULES Hamartoma Calcified mets in Chondrosarcoma
  44. 44. MULTIPLE PULMONARY NODULES • Multiple small nodules 2-4 mm are called miliary shadows . • Mostly metastases or tuberculous granulomas. • Calcified nodules are generally benign except for metastases from bone or cartilaginous tumours. Posteroanterior view of the chest showing multiplediffuse pulmonary nodules.
  45. 45. PULMONARY INFARCTS • These are variable in appearance. • Usually wedge shaped with base towards the periphery(HAMPTON’ S HUMP) • Resolve slowly over months decreasing in size (MELTING SIGN)
  46. 46. CAVITATING LESIONS AND CYSTS • It’s a gas filled space surrounded by a complete wall which is 3 mm or greater in thickness. • Thinner walled cavities are called CYSTS or ring shadows. • Requires a patent airway to communicate with necrotic area • Common cavitating processes are tuberculosis, staphylococcal infections and carcinoma
  47. 47. CAVITATING LESIONS Bronchogenic Ca Cavitating Staphylococcal Pneumonia
  48. 48. Common sites of the Lesion • Tuberculous cavities : Upper zone and apical segments of the lower lobes. • Lung abscesses following aspiration : Rightsided and lower zone(patient position dependant) • Traumatic lung cysts : Subpleural • Amoebic abscesses : Right base ,infection extending from the liver. • Pulmonary infarcts : Usually in lower lobes CAVITATING LESION
  49. 49. CAVITATING LESION THICK WALLED • Acute abscesses • Most neoplasms (usually squamous cell) • Lymphoma • Most metastases • Wegener's granulomas • Rheumatoid nodules THIN WALLED • Bulles • Pneumatoceles, • Cystic bronchiectasis • Hydatid cysts • Traumatic lung cysts • Chronic inactive tuberculous cavities • Neoplasms
  50. 50. CAVITATING LESION B/L Bullae Thick walled cavity with air-fluid
  51. 51. FLUID LEVELS • Fluid levels are common in primary tumors , and irregular masses of blood clot or necrotic tumor may be present. • Fluid levels are uncommon in cavitating metastases and tuberculous cavities .
  52. 52. FLUID LEVELS ON A CHEST RADIOGRAPH • Abscesses • Hydropneumothorax-Trauma, surgery, bronchopleural fistula • Oesophageal – pharyngeal pouch, diverticula Obstruction – tumours, achalasia • Mediastinal – Infections, oesophageal perforation • Pneumopericardium
  53. 53. AIR CRESCENT SIGN Crescent-shaped radiolucency within a parenchymal consolidation or nodular opacity Air fills the space between the devitalized tissue and surrounding parenchyma Opaque rim of hemorrhagic tissue peripheral to the radiolucency Common in Aspergilloma
  54. 54. WATER LILY SIGN Ruptured hydatid cysts with daughter cysts floating within the cavity.
  55. 55. • Other intracavitory lesions include inspissated pus,blood clot and cavernoliths. • Blood clot may form within cavitating neoplasms, tuberculosis and pulmonary infarcts
  56. 56. • Calcification is most easily recognized with low kVp films. • In the elderly , calcification of the tracheal and bronchial cartilage is common. • Tuberculosis is the commonest calcifying pulmonary process usually upper zone. • Chickenpox foci are smaller (1-3 mm), regular in size and widely distributed. CALCIFICATION
  57. 57. Pulmonary TB Chicken pox pneumonia CALCIFICATION
  58. 58. CALCIFICATION Punctate - Silicosis Irregular - Pleural Plaques
  59. 59. • Pleural caps • Pleural fluid • Bullae • Pancoast tumour • Pneumothorax • Infections-tuberculosis COMMON CAUSES OF APICAL SHADOWS
  60. 60. APICAL SHADOWING Apical pleural thickening/Pleural Cap • It is crescent shaped density • It may represent old pleural thickening • Also seen in Pancoast tumor – assess the ribs for notching Lung apex • Commom site for Tb , fungal infection like histoplasmosis , coccidioidomycosis, aspergillosis etc
  61. 61. APICAL SHADOWING
  62. 62. CAUSES OF AN OPAQUE HEMITHORAX • Technical . Rotation, scoliosis • Pleural. Hydrothorax, large effusion Thickening, mesothelioma. • Surgical. Pneumonectomy, thoracoplasty. • Congenital. Pulmonary agenesis. • Mediastinal . Cardiomegaly, Tumours. • Pulmonary . Collapse, consolidation, fibrosis . • Diaphragmatic hernias
  63. 63. • Comparision of lungs should reveal any focal or generalized abnormality of transradiancy. • Look for signs of obstructive or compensatory emphysema such as o splaying of the ribs o separation of the vascular markings o mediastinal displacement o depression of the hemidiaphragm UNILATERAL HYPERTRANSLUCENCY
  64. 64. • Most common causes : Patient rotation and scoliosis • With rotation to the left, the left side becomes more radiolucent. • Mastectomy is another important cause. An abnormal axillary fold is seen following a radical mastectomy. UNILATERAL HYPERTRANSLUCENCY
  65. 65. UNILATERAL HYPERTRANSLUCENCY MastectomyObstructive Emphysema
  66. 66. PLEURAL ABNORMALITIES
  67. 67. • Pleural effusion. • Pleural fibrosis/Thickening. • Pleural plaques. • Pleural calcification. • Pleural tumors. • Pneumothorax • Fibrothorax PLEURAL ABNORMALITIES
  68. 68. PLEURAL EFFUSION • Fluid in the pleural cavity. • Erect CXR- commonest appearance is an opaque meniscus at costophrenic angle. • If the effusion is very large entire hemithorax may be opaque and heart may be pushed to the normal side.
  69. 69. Features on CXR: • Blunting of the costophrenic angle • Blunting of the cardiophrenic angle • Fluid within the horizontal or oblique fissures • A meniscus will be seen, on frontal films seen laterally and gently sloping medially • With large volume effusions, mediastinal shift occurs away from the effusion Approximately 200 ml of fluid are needed to detect an effusion in the frontal film vs. approximately 75ml for the lateral PLEURAL EFFUSION
  70. 70. • LAMELLAR EFFUSION: Shallow collections between the lung surface and the visceral pleura sometimes sparing the costophrenic angle. • LOCULATED EFFUSION: Effusion within the fissures. ATYPICAL EFFUSION
  71. 71. ATYPICAL EFFUSION
  72. 72. SUBPULMONIC EFFUSION • Effusions accumulate between the diaphragm and undersurface of a lung. The following features are helpful : • Right: peak of the hemidiaphragm is shifted laterally • Left: increased distance between lower lobe air and gastric air bubble
  73. 73. SUBPULMONIC EFFUSION
  74. 74. PLEURAL PLAQUES • Plaques are focal areas of thickening of parietal pleura due to previous exposure to asbestosis. • Characteristically appear as scattered islands of well circumscribed pleural densities. • Most commonly seen posteriorly and laterally, predominantly affecting the lower third of the thorax. • Do not involve the CP angles . • May be calcified.
  75. 75. PLEURAL CALCIFICATION True calcification • Calcified pleural plaques from asbestos exposure : typically has sparing of costophernic angles • Haemothorax • Infection involving the pleura - e.g pyothorax / empyema • Tuberculous pleuritis • extra skeletal osteosarcomaof pleura .
  76. 76. • Refers to the presence of gas in the pleural space. • Open Pneumothorax: If air can move in and out of pleural space during respiration • Closed Penumothorax: No movement of air occurs • Valvular : Air enters pleural space on inspiration but doesnot leave on expiration • When this collection is constantly enlarging with resulting compression of mediastinal structures it is known as a tension pneumothorax. PNEUMOTHORAX
  77. 77. DEEP SULCUS SIGN • This sign refers to a deep collection of intrapleural air (pneumothorax) in the costophrenic sulcus as seen on the supine chest radiograph . •
  78. 78. CXR APPEARANCES • Visible visceral pleural edge see as a very thin, sharp white line • No lung markings are seen peripheral to this line • The peripheral space is radiolucent compared to adjacent lung • The lung may completely collapse • No mediastinal shift unless a tension pneumothorax is present .
  79. 79. HYDROPNEUMOTHORAX • It is the concurrent presence of a pneumothorax as well as a hydrothorax in the pleural space. • On an erect chest radiograph, classically seen as an air-fluid level.
  80. 80. FIBROTHORAX • Fibrosis within the pleural space • Occurs secondary to the inflammatory response • Seen in TB Asbestosis Hemothorax etc
  81. 81. HILAR ABNORMALITIES
  82. 82. • Superior margin of left hilum is normally higher than the right. • Whenever a left hilum appears lower than right – check whether there is other evidence suggestive of collapse of either left lower lobe or of right upper lobe ; or enlargement of right hilum(eg; tumor or nodes) HILAR ABNORMALITIES
  83. 83. • Bilateral hilar enlargement -Enlarged lymph nodes, or vascular enlargment. • Unilateral enlargement : MC due to neoplasm or infections such as tuberculosis and whooping cough. • Nodes affected by lymphoma are often asymmetrically involved. • Bilateral involvement occurs with sarcoidosis, silicosis and leukaemia HILAR ENLARGEMENT
  84. 84. HILAR ABNORMALITY
  85. 85. MEDIASTINAL ABNORMALITIES
  86. 86. MEDIASTINAL ABNORMALITIES
  87. 87. • Used to discern the anterior or posterior location of a lesion in the superior mediastinum on frontal chest radiographs. • The anterior mediastinum stops at the level of the superior clavicle. • Thus when a mass extends above the superior clavicle, it is located either in the neck or in the posterior mediastinum. • When lung tissue comes between the mass and the neck, the mass is probably in the posterior mediastinum. CERVICOTHORACIC SIGN
  88. 88. CERVICOTHORACIC SIGN A mass extending above the level of the clavicle and there is lung tissue in front of it, so this must be a mass in the posterior mediastinum.
  89. 89. ANTERIOR MEDIASTINAL MASS T cell lymphoma Anterior mediastinal masses consist of the 4 "T's" (Terrible lymphoma, Thymic tumors, Teratoma, Thyroid mass) and aortic aneurysm, pericardial cyst, epicardial fat pad.
  90. 90. RETROSTERNAL GOITRE • Retrosternal goitre The plain chest film shows a large superior mediastinal mass narrowing the trachea
  91. 91. MIDDLE MEDIASTINAL MASS MC:L ymphadenopathy due to metastases or primary tumor.  Other causes include hiatial hernia, aortic aneurysm, thyroid mass, duplication cyst bronchogenic cyst. Esophageal duplication cyst
  92. 92. POSTERIOR MEDIASTINAL MASS Mass is detected by a pleural margin search along the superomedial part of right lung. The interface is interrupted. The differentials • Neoplasm,  Lymphadenopathy,  Aortic aneurysm.  Neurenteric cyst or  Lateral meningocele  Extramedullary hematopoiesis.
  93. 93. • Lymphadenopathy is the next most frequent cause of a mediastinal swelling.. • Lymphadenopathy may occur in any of the three compartments and it is often possible to diagnose enlarged lymph nodes from their lobulated outlines and the multiple locations involved. Superior mediastinal lymph node enlargement. Note the bilateral lobular masses.
  94. 94. HILUM OVERLAY SIGN • This sign is used to distinguish between cardiac enlargement and an anterior mediastinal mass, as follows; • Hilum lateral to the lateral border of the “mass”– Cardiac enlargement. • Hilum medial to the lateral border of mass”– Mediastinal mass.
  95. 95. HILUM OVERLAY SIGN
  96. 96. HILUM CONVERGENCE SIGN • Used to distinguish between a prominent hilum and an enlarged pulmonary artery. • If the pulmonary arteries converge into the lateral border of a hilar mass, the mass represents an enlarged pulmonary artery. • If the convergence appears behind the abnormality or arises from the heart, a mediastinal mass is more likely.
  97. 97. HILUM CONVERGENCE SIGN
  98. 98. THORACOABDOMINAL SIGN • To localize the LOWER MEDIASTINAL MASS on frontal CXR
  99. 99. • It is the presence of extraluminal gas within the mediastinum. AETIOLOGY • Blunt chest trauma • Secondary to chest, neck, or retroperitoneal surgery • Esophageal perforation : – Boerhaave syndrome – Endoscopic intervention – Esophageal carcinoma PNEUMOMEDIASTINUM
  100. 100. • Air around the pulmonary artery produces a black ring appearance. • Air around the arteries arising from the aortic arch appears as a black rings and often referred to as the “ring around the artery sign”. • Angel wing sign – represents the normal thymus surrounded by mediastinal air. PNEUMOMEDIASTINUM- CXR APPEARANCES.
  101. 101. CONTINUOUS DIAPHRAGM SIGN  Continuous lucency outlining the base of the heart, representing Pneumomediastinum . • Air in the mediastinum tracks extrapleurally, between the heart and diaphragm . • Pneumopericardium can have a similar appearance but will show air circumferentially outlining the heart.
  102. 102. DIAPHRAGM
  103. 103. CAUSES OF A UNILATERAL ELEVATED DIAPHRAGM • Above diaphragm: phrenic nerve palsy; infiltration from bronchial carcinoma or mediastinal tumour. • Diaphragm: eventration, more common on the left and results from deficiency or atrophy of muscle. • Below diaphragm: right diaphragm elevation; liver or subphrenic abscess, liver secondary deposits. DIAPHRAGM
  104. 104. CAUSES OF BILATERAL ELEVATED DIAPHRAGMS • Obesity • Hepatosplenomegaly • Ascites • Pregnancy • Abdominal masses. DIAPHRAGM
  105. 105. DIAPHRAGMATIC HERNIA • A congenital defect in the diaphragm, more common on the left, allows bowel protrusion into the thoracic cavity. Eg: Hiatus Hernia Bochdalek Hernia Morgagni Hernia
  106. 106. EVENTRATION OF THE DIAPHRAGM • This is a congenital condition in which the diaphragm lacks muscle and becomes a thin membranous sheet. • The eventration may only involve part of one hemidiaphragm, resulting in a smooth 'hump Localized eventration of the diaphragm. There is a smooth localized elevation of the medial half of the right hemidiaphragm (arrows
  107. 107. CHEST WALL ABNORMALITY
  108. 108. BONES CLAVICLE • Old healed fractures are frequent findings. • Erosion of the outer ends of the clavicles is associated with rheumatoid arthritis and hyperparathyroidism. • Hypoplastic clavicles are seen with the Holt-Oram syndrome and cleido cranial dysostosis CHEST WALL ABNORMALITIES
  109. 109. Holt Oram Syndrome Rheumatoid arthritis CLAVICULAR ABNORMALITY
  110. 110. • Sternal fractures are often due to a steering wheel injury. • Associated with congenital heart disease: Sternal agenesis, premature obliteration of the ossification centres and pigeon chest which are found with ventricular septal defects. STERNAL ABNORMALITIES
  111. 111. • Depressed sternum(Pectus Excavatum) - Atrial septal defects and Marfan's syndrome. • Delayed epiphyseal fusion is a feature of cretinism • Double ossification centres in the manubrium commonly occur in Down's syndrome STERNAL ABNORMALITIES
  112. 112. RIB NOTCHING • It may affect the superior or inferior surface and can be U/L or B/L • Superior notching : Rheumatoid arthritis, SLE,hyperparathyroidism Marfan's syndrome, neurofibromatosis and in paraplegics and polio victims. • Inferior notching develops as a result of hypertrophy of the intercostal vessels or with neurogenic tumours .
  113. 113. CAUSES OF INFERIOR RIB NOTCHING
  114. 114. CERVICAL RIB • A cervical rib in humans is a supernumerary rib which arises from the seventh cervical vertebra. • Congenital rib anomalies such as hypoplasia, bridging and bifid ribs are common.
  115. 115. RIB FRACTURE • The sixth to ninth ribs line are the common sites for cough fractures. • Stress fractures usually affect the first ribs. • Pathological fractures may be due to senile osteoporosis, myeloma, Cushing's disease and other endocrine disorders, steroid therapy and diffuse metastases. • Cushing's disease is associated with abundant callus formation
  116. 116. • Check for abnormal curvature or alignment , bone and disc destruction, sclerosis, paravertebral soft-tissue masses and congenital lesions such as butterfly vertebrae • Anterior erosion of vertebral bodies sparing the disc spaces is noted with aneurysm of descending aorta, vascular tumors and neurofibromatosis. • A single dense vertebra , the ivory vetebra, - classical appearance of lymphoma, but also – pagets disease and metastasis. THORACIC SPINE
  117. 117. THORACIC SPINE
  118. 118. • Destruction of pedicle is typical of METASTASIS . • Destruction of the disc with adjacent bony involvement is characteristic of an INFECTIVE PROCESS. • Disc calcification occurs in ochronosis and ankylosing spondylitis. THORACIC SPINE
  119. 119. SOFT TISSUE ABNORMALITIES Skin lesions • Skin lesions including naevi and lipomas may simulate lung tumours. • Multiple nodules occur with neurofibromatosis . • Mastectomy is one of the commonest causes of a translucent hemithorax
  120. 120. • Poland’s syndrome; There is a congenital absence of pectoralis major and minor, associated with syndactyly and rib abnormalities . SOFT TISSUE ABNORMALITIES
  121. 121. Thank You

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