DDX by Imaging

Head & Neck

Respiratory System

X-Ray:

predominantly linear interstitial pattern on xray ddx=acute causes are acute interstitial edema, viral pna. Chronic causes= chronic interstitial edema, lymphangitis carcinomatosis/neoplasm, asbestosis, IPF/ILD 

CT Chest:

Honeycombing:(looks like beehive, base worse>apex)=end stage disease, IPF, collagen vascular disease, asbestosis, upper lung sarcoidosis, hypersensitivity pneumonitis 

Nodular pattern:  

• Perilymphatic pattern-sarcoidosis 

• Random pattern- silicosis, pneumoconiosis, TB, metastasis, fungal 

• Centrilobular pattern- subacute pneumonitis, bronchiolitis 

• Bronchovascular pattern-lymphoproliferative disorders(post transoplant), lymphangitic carcinomatosis, kaposi sarcoma, sarcoidosis, OP, infectious PNA 

GGO pattern: infectious, edema, pulm hemorrhage, OP(peripheral ggos, consolidations), PA proteinosis, Adenocarcinoma in-situ, DIP/NSIP, 

Mosaic pattern : infection, small airway disease, pulm vascular disease(sickle cell) 

Tree-in-bud pattern: viral/bacterial/fungal or atypical infection, ABPA, aspiration, cystic fibrosis, diffuse panbronchiolitis, RB-ILD 

Septal thickening pattern: edema, lymphangitic carcinomatosis 

Cystic pattern:(looks like cysts in all fields similar to emphysema): Langerhearns cell histiocytosis(cyst + nodules), lymphocytic interstitial pneumonitis, collagen vascular disease, PCP/PJP(ggos + cysts), emphysema 

Ultrasound:

Cardiac System

EKG:

Normal EKG:

TWIs: ACS, PE(most common in v1-3, brugada, RBBB, ARVC,persistent juvenile twave pattern 

Echo:

CT:

Abdomen

CT abdomen:

Ultrasound: