“…In most instances, the giant cell component has an osteoclast-like appearance and is related to stromal hemorrhage. This situation has been reported in thyroid gland [6], pancreas [7], liver [12], gall bladder [8], salivary glands [5], colon [4], ovary [17], kidney [3], renal pelvis [11], urinary bladder [10], breast [19], and larynx [16]. In other cases, often from lung origin [1,2,9,15] but also occurring in pancreas [13], urinary bladder [10], and other sites, the giant cells are neoplastic and are associated with poor differentiation and dismal prognosis.…”