Mnemonics

Differential diagnosis of lucent/lytic bone lesions

FOG MACHINES ¹

F: fibrous dysplasia (FD) or fibrous cortical defect (FCD)
O: osteoblastoma
G: giant cell tumor (GCT) or geode
M: metastasis(es)/myeloma
A: aneurysmal bone cyst (ABC)
C: chondroblastoma or chondromyxoid fibroma
H: hyperparathyroidism (brown tumor)
I: infection (osteomyelitis) or infarction (bone infarction)
N: non-ossifying fibroma (NOF)
E: enchondroma or eosinophilic granuloma (EG)
S: simple (unicameral) bone cyst

Differential diagnosis of intra-axial ring enhancement

MAGIC DR ²

Metastasis
Abscess
Glioma
Infarct
Contusion
Demyelinating Disease
Radiation necrosis

Differential diagnosis of Upper Lobe Predominant pulmonary fibrosis

SHORTI³

Sarcoidosis
Hypersensitivity pneumonitis
Occupational
Radiation
TB/Fungus
Idipathic pleuroparenchymal elastofibrosis

Causes Chronic Airspace Opacity
SPACE-V⁴

Sarcoid
Pneumonia (atypical, organizing, lipoid)
Atlectasis
Cancer (lung and lymphoma)
Eosinophilic pneumonia
Vasculitis

https://doi.org/10.53347/rID-4501[↩]
Core Radiology: A Visual Approach to Diagnostic Imaging, 2e[↩]
https://www.youtube.com/watch?v=kLnessN9rwY[↩]
https://www.youtube.com/watch?v=R0j6fu4LBRk[↩]