ACROMEGALY AND A GIANT RETROPERITONEAL LIPOSARCOMA PRODUCING IGF-1

AACE Clinical Case Reports
César Ernesto Lam-ChungDaniel Cuevas-Ramos

Abstract

Liposarcoma is the most common histotype of retroperitoneal sarcomas, representing up to 45% of all cases. We report a rare combination of acromegaly and liposarcoma in the same individual. Laboratory and imaging studies including an oral glucose tolerance test, measurements of growth hormone (GH) and insulin-like growth factor-1 (IGF-1), and a computed tomography scan were performed. The patient was a 60-year-old male with a history of acromegaly diagnosed on the basis of elevated IGF-1 at 1,373 ng/mL (age-appropriate reference range is 87 to 225 ng/mL) and macroadenoma treated with transsphenoidal surgery. He presented 8 years later with a history of abdominal distension and weight loss. Physical examination was notable for a right-sided abdominal mass that was tense and non-fluctuant. Two years earlier, he had a post oral glucose tolerance test GH level <0.25 ng/mL and IGF-1 level of 256 ng/mL (age-appropriate reference range is 55 to 206 ng/mL). Pituitary magnetic resonance imaging reported a 3.7 × 2.0-mm left-sided parasagittal lesion. Computed tomography scan showed a 25.0 × 22.0 × 32.3-cm heterogeneous giant mass in the right abdomen corresponding to a liposarcoma causing displacement of kidney, liver, and bowel loops. T...Continue Reading

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