Journal of Pathology and Translational Medicine

Case Study

Oncocytic Renal Cell Carcinoma with Tubulopapillary Growth Having a Fat Component: Na Rae Kim, Hyun Yee Cho; J Pathol Transl Med. 2015;49(5):413-417. Published online July 30, 2015; DOI: https://doi.org/10.4132/jptm.2015.07.01

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Abstract PDF: We report a rare case of oncocytic renal cell carcinoma (RCC) with tubulopapillary growth in the background of tuberculous end-stage kidney disease. Histology of the renal mass consisted of oncocytic cells forming solid, thin tubules and rare papillae. The tumor had abundant eosinophilic oncocytic cells containing occasional cytoplasmic Mallory body–like hyaline globules and a tiny focus of clear cells with intervening mature fat. Both the oncocytic cells and clear cells were immunoreactive for a-methylacyl-CoA racemase, vimentin, pancytokeratin, and CD10, and negative for transcription factor E3, CD15, human melanoma black 45, and c-kit. Mallory body–like hyaline globules were positive for CAM 5.2 and periodic acid–Schiff with or without diastase. Ultrastructurally, the tumor cells had abundant cytoplasmic mitochondria. The present case is a rare case of oncocytic RCC with tubulopapillary growth pattern. The case is unique in that the tumor was mixed with fat component, which is not common in RCC and thus can lead to misdiagnosis.

Case Report

Pure Uterine Lipoma, a Very Rare Benign Tumor.: Elif Ulker Akyildiz, Sema Ozuysal, Akgul Arici, Mehmet Aral Atalay; Korean J Pathol. 2010;44(6):679-681.; DOI: https://doi.org/10.4132/KoreanJPathol.2010.44.6.679

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Pure lipomas of the uterus are very rare tumors that may be misdiagnosed on radiological examination due to their rarity and fat content. We present here the case of a 57-year-old postmenopausal woman who presented to the hospital with lower abdominal pain. Abdominal hysterectomy and bilateral salpingo-oophorectomy were performed under the prediagnoses of benign cystic ovarian teratoma or leiomyoma. On the histopathological examination of tissue samples, the tumor was composed of mature fat cells. There were a few smooth muscle cells confined to the periphery. Pure uterine lipoma may be asymptomatic or it may have symptoms similar to those of leiomyoma such as vaginal bleeding or pelvic pain. A pure lipoma should be diagnosed only if smooth muscle cells are confined to the periphery.

Citations

Citations to this article as recorded by

Coexistence of uterine lipoma, leiomyoma and endometrial polyp
Nilgün SÖĞÜTÇÜ, Nazlı Sena ŞEKER
Cukurova Medical Journal.2019; 44(3): 1139. CrossRef

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