Musculoskeletal Radiology, and in particular, Bone Tumors, is considered an important topic for the NEET PG exam. This is because bone tumors are a common cause of musculoskeletal pain and can impact an individual's mobility and quality of life.
The diagnosis and management of bone tumors often involves the integration of radiology with other specialties such as orthopedics, oncology, and pathology. A good understanding of musculoskeletal radiology, including bone tumors, is essential for effective patient care.
Young patient (<50 yrs); Pan joint fusion / pan spinal fusion
Inflammatory arthritis affecting spine
Most sensitive investigation / IOC for sacroiliitis: MRI [STIR sequence / fat suppressed sequence]
1st manifestation: Sacroiliitis [where there is inflammation in sacro-iliac joint → Bone marrow edema]
End stage: Ankylosis of sacroiliac joint
1st sign on spine (X ray): Shinny corner sign / Romanus lesion (inflammation at attachment of annulus fibrosus)
EnthesopathyorEnthesitis : At all tendentious, ligament attachment there is inflammation
As inflammation progress vertical syndesmophytes (new bone formation) → fusion of intervertebral disc (fusion of spine) → ligaments calcification → anterior, posterior, facet joints fuse; calcification of supraspinous, interspinous ligaments
Tram Track appearance
Dagger sign (central ossification)
Diffuse Idiopathic skeletal hyperostosis (DISH)
Pan-Joint fusion (AS)
Flowing wax ossification of ALL
Old (> 50 yrs)
Intervertebral disc and all other joints : Normal
Ossification of PLL (Posterior longitudinal ligament)
Aka Japan’s disease
Density of Bones increased (sclerosis) + Interosseous ligament calcification (Hallmark of Fluorosis)
Can have associated dental changes
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