title: Exponentially growing osteosarcoma of mandible with acromegaly.
abstract: BACKGROUND
  Osteosarcoma of the head and neck is aggressive malignancy that might be affected by growth hormone. The purpose of this study was to demonstrate an unusual case of osteosarcoma with acromegaly.
  
  
  RESULTS
  This case is about a 39-year-old woman with an osteosarcoma of the mandible, who had a history of exponential tumor growth in spite of chemotherapy at another hospital. She transferred to Samsung Medical Center and underwent a wide resection of tumor and free flap reconstruction. During postoperative care, a brain MRI and hormonal test revealed a growth hormone-secreting pituitary adenoma, and then a transsphenoidal approach pituitary tumor removal was performed. Immunohistochemistry of the osteosarcoma indicated positive for insulin-like growth factor (IGF)-2 and somatostatin receptor.
  
  
  CONCLUSIONS
  This study proved the IGF-2 and somatostatin receptor from the osteosarcoma of the patient with acromegaly, and this could explain that the growth hormone secreting from the pituitary adenoma might be a risk factor of therapeutic intractability and growth acceleration of osteosarcoma. © 2016 Wiley Periodicals, Inc. Head Neck 38: E2432-E2436, 2016.
authors.affiliation: Department of Otorhinolaryngology - Head and Neck Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea.
authors.forename: Nayeon
authors.initials: N
authors.lastname: Choi
authors.affiliation: Department of Pathology and Translational Genomics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
authors.forename: Seokhwi
authors.initials: S
authors.lastname: Kim
authors.affiliation: Department of Otorhinolaryngology - Head and Neck Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea.
authors.forename: Jungkyu
authors.initials: J
authors.lastname: Cho
authors.affiliation: Department of Otorhinolaryngology - Head and Neck Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea.
authors.forename: Byung Kil
authors.initials: BK
authors.lastname: Kim
authors.affiliation: Department of Otorhinolaryngology - Head and Neck Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea.
authors.forename: Young Sang
authors.initials: YS
authors.lastname: Cho
authors.affiliation: Department of Otorhinolaryngology - Head and Neck Surgery, Biomedical Research Institute, Pusan National University Hospital, Pusan National University School of Medicine, Busan, Korea.
authors.forename: Jeon Yeob
authors.initials: JY
authors.lastname: Jang
authors.affiliation: Department of Otorhinolaryngology - Head and Neck Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea.
authors.forename: Chung-Hwan
authors.initials: CH
authors.lastname: Baek
keywords: acromegaly; head and neck; insulin-like growth factor (IGF)−2; osteosarcoma; somatostatin