“…Benign soft tissue tumours morphologically resembling the brown fat of the human embryo or the interscapular gland of hibernating animals were first recognized over one hundred years ago (1,2). In human embryos, brown fat was found in the interscapular region, similar to hibernating animals, in the neck and axillae, mediastinum, parietal pleura, omental, periadrenal and perinephric fat, groins and in the peripheral parts of the limbs (1). Brown fat was first described by Velch in 1670 and the term hibernoma was coined by Gery in 1914, because of its similarity to brown fat cells found in the glands of hibernating animals (2,3).…”