Abstract：
Percutaneous image-guided biopsies are becoming increasingly common in routine pathology practice, with the greater omentum emerging as a common target. We present herein an account of a middle-aged lady with a complex ovarian mass, omental thickening, and raised serum CA125; clinically suspected to have advanced ovarian malignancy. Fine needle aspiration cytology (FNAC) from the ovarian mass was inconclusive. Omental biopsy revealed only refractile, birefringent crystalline material with surrounding foreign body giant cell reaction; thus surprising the clinical team. Subsequent resection of the ovarian mass showed a teratoma composed exclusively of thyroid tissue, diagnosed as struma ovarii. The omental crystals, interpreted as calcium oxalate crystals, were possibly a consequence of colloid seeding during the ovarian mass FNAC.
摘要：
经皮图像引导活检在常规病理学实践中变得越来越普遍，大网膜正在成为一个共同的目标。我们在这里介绍了一位患有复杂卵巢肿块的中年女士，网膜增厚,血清CA125升高；临床怀疑患有晚期卵巢恶性肿瘤。卵巢肿块的细针穿刺细胞学（FNAC）尚无定论。Omental活检显示只有折射，双折射晶体材料与周围异物巨细胞反应；从而使临床团队感到惊讶。随后切除卵巢肿块显示畸胎瘤仅由甲状腺组织组成，诊断为卵巢甲状腺肿。网膜晶体，解释为草酸钙晶体，可能是卵巢肿块FNAC期间胶体播种的结果。
