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Radiology.Academy.Sk

MSK DDx

Lytic or Bubbly Lesions: FEGNOMASHIC




Fibrous Dysplasia

No pain, no periosteal reaction, if in tibia mention adamantinoma; pelvis + proximal femur, ribs, skull; ground glass




Enchondroma

Must have calcs except in phalanges, no pain, no periostitis




Eosinophilic granuloma (EG-LCH)

must be < 30 yo




Giant Cell Tumor

epiphysis must be closed, must be epiphyseal and abut the articular surface, eccentric, well defined but nonsclerotic border




Nonossifying fibroma NOF

must be < 30 yo, no pain, no periostitis




Osteoblastoma

always mention with ABC




Mets, Myeloma

must be > 40 yo




Aneurysmal Bone Cyst ABC

expansile, must be < 30 yo




Solitary bone cyst

must be centrally located, no pain, no periostitis, < 30 yo




Hyperparathyroidism (brown tu)

must have other evidence of hyperparahyroidism




Infection




Chondroblastoma

< 30 yo, epiphyseal




Chondromyxoid Fibroma

mention with NOF




Multiple Lytic Lesions: FEEMHI




Lytic Epiphyseal Lesions: ICE GM




Lytic lesion < 30 yo




Dense Bones Regular Sex Makes Occasional Perversions Much More Pleasurable and Fantastic

- Renal Osteodystrophy
- Sickle Cell Disease
- Myelofibrosis
- Osteopetrosis
- Pyknodysostosis
- Mastocytosis
- Mets - breast and prostate
- Pagets disease
- Athletes
- Fluorosis


High Riding Shoulder

- RA
- CPPD
- Trauma


Widened teardrop in the hip

- Infection
- Trauma
- Pigmented VilloNoduular Synovitis - PVNS
- Synovial osteochondromatosis
- AVN


Permeative Lesions in Children

- Ewing sarcoma
- Infection
- EG


Cortical holes (Pseudopermeative lesions)

- Osteoporosis
- Radiation
- Hemangiomas


CPPD assoc. disorders

- primary hyperparathyroidism
- Gout
- Hemochromatosis


Dense base of skull

- FIbrous dusplasia
- Englemans disease
- Von Buchems disease
- Paget's disease
- Meningioma
- Pyknodysostosis
- Osteopetrosis


Bony sequestrum

- INfection
- EG
- Osteoid osteoma
- FIbrosarcoma
- Lymphoma