Giant primary intraosseous calvarial hemangioma of the occipital bone

Traumatic enlargement of an intradiploic cavernous hemangioma

“…Other may be congestive heart failure and thrombocytopenia known in this setting as Kasabach–Merritt syndrome. [1234] Our patient had posttraumatic enlargement of the lesion, which was initially very small. We believe that the role of trauma in etiopathogenesis is controversial.…”

“…Primary intraosseous hemangiomas are uncommon bony tumors with an incidence of 0.7-1%[1] with majority occurring in the calvaria and vertebrae. Frontal and parietal bones are common location in the skull with a female preponderance.…”

“…Occipital location is very rarely reported with these benign bony vascular lesions. [1] Cavernous type is commoner in skull than capillary hemangiomas, which is frequently seen in vertebral column. [2] These commonly manifest clinically during adulthood unlike capillary hemangiomas of infancy and childhood, which are visible on the surface.…”

“…On plain radiographs, they show sunburst of radiating trabeculae having peripheral sclerotic rim. [1] This is due to gradual erosion of surrounding bone as they grow. On CT, calvarial hemangiomas are lytic lesions with multiple interposed trabeculae.…”

Giant primary calvarial hemangioma over torcula: Radiological features and operative nuances

“…Primary intra-osseous cavernous hemangiomas (PICHs) account for only 0.2% of all bone neoplasms. [ 12 ] Calvarial involvement by giant PICHs[ 2 4 5 6 9 10 11 ] [ Table 1 ] and PICH involving squama of occipital bone[ 3 4 7 ] are rarely reported. These lesions occur in fourth decade and women are affected 2–4 times more often than men.…”