title: Clear cell sarcoma of soft tissue metastatic to the ovaries: a heretofore unreported occurrence.
abstract: Clear cell sarcoma of soft tissue (CCSST) is a rare soft tissue neoplasm with marked variable tumor progression and prognosis. Although morphologically similar to malignant melanoma, CCSST can be distinguished by the presence of a t(12; 22)(q13; q12) and/or associated EWSR1-ATF1 chimeric gene. CCSST has an affinity for the extremities and is capable of metastasizing to a wide variety of sites including bone, lung, and lymph nodes and rarely to skin, liver, heart, muscle, and brain. Metastases have been known to occur as late as 29 years after initial presentation. We report a case of a 33-year-old woman who presented with bilateral ovarian cystic tumors, ascites, and pulmonary nodules. Her past medical history was significant for clear cell sarcoma of the left foot 2 years earlier. Bilateral salpingo-oophorectomy was performed and the light microscopic and immunohistochemical findings coupled with the detection of an EWSR1 rearrangement by fluorescence in situ hybridization were compatible with a diagnosis of CCSST metastases to the ovaries. To the best of our knowledge, this is the first reported case of CCSST metastatic to the ovaries.
authors.affiliation: Department of Pathology, University of Maryland Medical Center, Baltimore, Maryland 21201, USA.
authors.forename: Summer L
authors.initials: SL
authors.lastname: Nugent
authors.forename: Daniel C
authors.initials: DC
authors.lastname: Dim
authors.forename: Julia A
authors.initials: JA
authors.lastname: Bridge
authors.forename: Olga B
authors.initials: OB
authors.lastname: Ioffe
mesh_terms: D000328:Adult; D002148:Calmodulin-Binding Proteins / Q000235:genetics; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D017404:In Situ Hybridization, Fluorescence; D010051:Ovarian Neoplasms / Q000235:genetics / Q000556:secondary* / Q000601:surgery; D010052:Ovariectomy; D034802:RNA-Binding Protein EWS; D016601:RNA-Binding Proteins / Q000235:genetics; D018227:Sarcoma, Clear Cell / Q000235:genetics / Q000556:secondary* / Q000601:surgery; D012983:Soft Tissue Neoplasms / Q000235:genetics / Q000473:pathology*
chemical_list: D002148:Calmodulin-Binding Proteins; C500986:EWSR1 protein, human; D034802:RNA-Binding Protein EWS; D016601:RNA-Binding Proteins