Epithelioid angiosarcoma of the spine: A case report of a rare bone tumor.

Abstract:

:Epithelioid angiosarcoma (EA) is an extremely rare subtype of angiosarcoma, which is characterized by large cells with an epithelioid morphology. EA typically arises in deep soft tissues, including the adrenal gland, skin and thyroid, however, EA rarely arises in the spine. The current study presents a case of osteolytic lesions involving the fourth lumbar (L4) level of the spine. Preoperatively, the patient was misdiagnosed with metastatic carcinoma, however, a radiological examination detected the presence of osteolytic or destructive lesions in the vertebrae, which extended into the pedicles. Histopathological and immunohistochemical evaluations were performed on the tumor tissue obtained from a decompression specimen of the L4 vertebra. A bone lesion composed of sheet-like malignant cells exhibiting atypical epithelioid morphology with vascular formation was observed. The presence of anastomosing vascular channels lined by epithelioid endothelial cells also indicated that focal endothelial differentiation had occurred. In addition, immunohistochemistry assays revealed that the lesion was positive for the endothelial cell markers, CD31, CD34 and vimentin. The tumor was treated with decompression of the L4 vertebra, followed by posterior stabilization. The patient subsequently refused chemotherapy and radiotherapy but completed six months of follow-up. At the time of writing, the tumor remains under control and the patient is asymptomatic. This case highlights the difficulty of diagnosing EA, which requires careful pathological examination and immunophenotype labeling. At present, CD31 is the most sensitive marker for detecting EA.

journal_name

Oncol Lett

journal_title

Oncology letters

authors

Lang J,Chen L,Chen B,Chen K,Liu A,Li J,Wang J

doi

10.3892/ol.2014.2055

subject

Has Abstract

pub_date

2014-06-01 00:00:00

pages

2170-2174

issue

6

eissn

1792-1074

issn

1792-1082

pii

ol-07-06-2170

journal_volume

7

pub_type

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