The patency of this vascular channel
enables blood to continue to flow between the aorta and the pulmonary artery.
The factors that best predicted relapse were vascular channel
invasion first of all and then predominance of embryonal carcinoma on histology.
Histologically, cavernous hemangiomas appear as closely packed, dilated vascular channels
lined with a layer of flattened endothelial cells.
The biopsy specimen exhibited dilated vascular channels
with flattened endothelium that were mostly blood-filled--findings that were consistent with a vascular malformation containing lymphatic and venous channels (figure 2).
9) Some investigators further speculate that PT may be related to a lymphatic or vascular abnormality, based on the observation of the frequent lymphatic or vascular proliferation and dilation of vascular channels
and its unusual distribution within the stroma of PT.
All biopsies showed hemorrhage associated with atypical epithelioid and spindle cells, forming anastomosing vascular channels
, distributed along and within lymphatics and arteries.
Kasabach-Merritt syndrome is a known complication of giant hemangioma due to endothelial defects in which the platelets get entrapped in the vascular channels
, leading to their consumption and thereby resulting in coagulopathy.
Centrally, the nodules consist of vascular channels
of varying caliber lined with plump endothelial cells interspersed with ovoid or spindle cells.
There was also clear evidence of increased cell survival around the perfused vascular channels
This difference is believed to be the result of scattered, but mostly central, cystic spaces that do not contain vascular channels
Histologically, these lesions are composed of anastomosing vascular channels
with irregular lumina and tall endothelial cells that slough off into the lumina.
Ultrasound revealed a soft-tissue mass with abnormal subcutaneous fat, without dilated vascular channels