Fig. 2From: Late recurrence of pStage 1 low-grade serous ovarian tumor presenting as a symptomatic bone metastasis: a case reportPhotomicrographs of CT-guided needle biopsy of paraspinal neoplasm. a Small uniform columnar or round cells can be seen forming confluent papillae associated with psammoma bodies against a fibrous background (hematoxylin and eosin [HE] stain, × 200). b Neoplastic cells positive for PAX8 (immunohistochemical [IHC] stain, × 200). c Positive for ER (IHC, × 200). d Positive for WT1 (IHC, × 200). e Negative for thyroglobulin (IHC, × 200). f P53 wild-type expression (IHC, × 200)Back to article page