Diaphyseal/Metaphyseal Centrally located < 20yo Filled with fluid (dark in color) Proximal Tibia, Fibula, Humerus
Unicameral Bone Cyst aka Simple Bone Cysts (SBC)
Diaphyseal/Metaphyseal Eccentrically located < 20yo Blood Filled Can occur in Epiphyseal > 20yo
Aneurysmal Bone Cyst (ABC)
Epiphyseal/Metaphyseal
20-40yo
20% quasi-malignant = b/c malignant in future!!!
Saponaceous appearance (soap bubble)
Giant Cell Tumor (GCT)
Epiphyseal/Metaphyseal
< 20yo
Off the side of the bone
Chondroblastoma
Night pain relieved by aspirin
Nidus (dark)
Reactive Sclerosis
Osteoid Osteoma
MC BBT of the Hand ***
Multiple ones are called Ollier’s Disease which result in pathological fractures
Malignant degeneration w/ Deformity
ST Calcification is Maffucci’s Syndrome
Enchondroma
MC BBT of the Spine *** Vertical Striations (corduroy cloth appearance) Vertebral body expansion = UMNL symptoms Skull (Calvarium) can become involved
Hemangioma aka Vascular Neogenesis
MC BBT to affect the Neural Arch (ATLAS)
MC Men < 20yo
Tx: Surgical Curtage
If not resolved: Painful scoliosis, Spinal canal stenosis, Neuro deficits
Osteoblastoma
"Rind Sign" sclerosis Causes deformity Saber Shin tibia & Sheppard's Crook femoral head "Ground Glass" appearance "Cafe au lait" spots "Cafe of Maine" appearance
Fibrous Dysplasia
Familiar history IVF enlargement Rib Deformity "Cafe au lait" spots "Coast of California" appearance *** Lisch Nodules *** Future: Deafness, Neuro deficits, Seizures
Neurofibromatosis
