Looser's zones/pseudofracture are commonly seen in the following areas except-
* Common location of pseudo fracture are scapula, medial femoral neck, pubic & ischial rami (pelvis),LT, ribs, & clavicle proximal ulna & radius, MT,MC and phalanges. Looser&;s Zone ( Milkman&;s Pseudofractures ) Pathognomonic * Looser zones are radiolucent lines that are often penetrating through the coex perpendicular to the shaft and are most often seen in the medial coices of the femurs and in the pelvis and ribs, neck of scapula. Caused by rapid resorption and slow mineralisation / Looser&;s zone. * Linear areas of undermineralized osteoid that occur in a bilateral and symmetric distribution * Characteristic sites; inner margins of femoral neck, proximal ulna, axillary margin of the scapula, pubic rami, and ribs. * Differential diagnosis: ; Paget&;s disease or fibrous dysplasia. Ref: Grainger's Diagnostic Radiology 4th/e p.1933,1949
Scapula
Ribs
Pelvis
Radius
Metabolic and endocrine disorders