Cervical hibernoma.

Hibernomas, are rare, benign tumors composed of brown fat. They can affect multiple sites, including the head, neck, trunk, and extremities. Their clinical presentation is similar to that of malignant tumors such as liposarcomas, which can lead to mismanagement. Imaging is useful but histopathologic confirmation of the tumor is needed. We present two cases of histology-proven neck hibernoma treated with radical excision.