Thoracic Flashcards
Unilateral Hypertransradiancy
-Rotation (lucent side closer to the tube ie away from the plate)
- Airway obstruction/FB
-PTx
Chest wall =
- Mastectomy
- Poland syndrome
- Polio
Swyer-james
- unilateral hyperlucent lung on radiography and air-trapping +/- bronchiectasis on CT. underdeveloped pulonary vasculatiry
- Unilateral or focal postinfectious Constrictive bronchiolitis
-emphysema
Congenital Lobar Emphysema
- Neonates (hyperexpansion
Mass effect on adjacent uninvolved lung &/or mediastinum
Left upper lobe > middle lobe > right upper lobe
MAC
Tree in bud - terminal bronchiole filled with radiopaque material
cylindric bronchiectasis
clasically right middle lobe or lingula (aka lady windermere syndrome)
Other causes/areas of lung
TB (Pus)
CF, ABPA (mucus)
Cells - Breast and gastric cancer
Aspiration
CMV (bronchial wall thickening)
Angioinvasive aspergillosis
Halo sign
=Nodule/mass/consolidation surrounded by ground-glass opacity related to hemorrhage
Air crescent sign
=Crescent-shaped gas collection within nodule, mass, or consolidation
heralds improvement in the condition.
Aspergilloma
Nodule or mass within preexisting cavity
Lies dependent/ Intracavitary movement
Monod sign - gas that surrounds a mycetoma/aspergilloma in a pre-existing pulmonary cavity
ABPA
‘Migratory’ airway consolidation
**Central (saccular) and upper lobe predomiannt bronchiectasis
(peripheral bronchi clasically spared)
**Dense mucoid impaction/finger in gloove - High-attenuating (>70–100 HU) bronchial contents represent fungal debris
Asthma
Cavity formation possible in later stage
Mucormycosis
Difficult to discern radiologically and clinically from aspergillosis
Can have halo sign but more specific reverse halo sign
unlike COP, peripheral capsule in the reversed halo sign tends to be thicker
Septic emboli
Peripheral wedges shaped densities +/- cavity
Lower lobe predominant
CAVITY mnemonic?
*Cancer (Squamous)
*Auto-immune (Wegners, Rheumatoid/caplan)
*Vascular - multiple pulmonary infarcts
*Infection - septic emboli - TB, staph, strep
*Truama - pneumatoceles
Y - Young - CPAM, Sequestrations
Round atelectasis
Comet tail sign
Adjacent to thickened pleural (assoacited with asbestosis) +/- Ca2+
can mimic a lung mass
Carcinoid
Endobronchial lesion, calcification (1/3).
Avid enhancement.
commonest lung primary in children and young adults
Atypical carcinoid are rare and can have no/heterogenous enhancement
iodine-123-octreotide scanning detect primary and metasatic disease for typical
atypical - FDG
Bronchopleural fistula
Post pneumonectomy
contralateral tracheal shift
Reduction on height of fluid on sequential films.
Can confirm on Xenon gas nuclear med
Normal appearances -
air fluid level at day4/5, by 14 days 100% fluid filled
ipsilateral tracheal shift
Diaphragm elevation
Round pneumonia
Young children
Pneumoccous, strep
Spherical area posterior lower lobes
With antibiotic and resolution of symptoms it doesnt need followed up
Fibrous Tumor of the Pleura (pleural fibroma)
Peripheral soft tissue nodule/mass, abuts pleura, obtuse angle
Often beningn
Less likely to malignant transform to sarcoma
Fibrous = low on T1 and T2
Egg shell calcifications nodes ?
Silicosis
Coal workers pneumoconiosis
Sarcoidosis
Treated lymphoma
Mediastinal lymph node calcification
Tuberculosis
Histoplasmosis
Amyloidosis (rare)
Metastases: papillary/medullary thyroid cancer, osteosarcoma, mucinous adenocarcinoma
Centrilobular
-smoking, apical/upper lobes segments
Panacinar
- Alpha1-antitrpysin , lower lobes/bases
Paraspetal
- Subpleural, bullous formation, spontaneous PTx
Congenital lobar overinflation
Neonate
hyperlucent LUL,-
mass effect on mediastinum and contralateral mediastinal shift
Bronchus unable to remain open in expiration, leading to air trapping
No discrete cyst or feeding vessels