PMC2779297_01
Pelvic ultrasonogram shows a large posterior pelvic mass with an irregular echogenicity (arrow) measuring 9.7x4.2 cm.
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F1
GYN clinic to our hospital. Gynecologic ultrasonography revealed a large posterior pelvic mass with an irregular echogenicity measuring 9.7x4.2 cm in size (Fig. 1).
The submitted specimen consists of multiple irregular fragments of soft tissue.
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F2
The tumor was soft and grayish-tan with focal areas of hemorrhage (Fig. 2).
The tumor cells proliferate in papillary patterns, with lymphoid aggregates and some cystic spaces filled with eosinophilic material (arrow) (H&E, x100).
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F3
The vascular spaces were empty or sometimes filled with eosinophilic material (Fig. 3).
The epithelioid lymphangioleiomyomatous cells proliferate haphazardly around slit-like vascular channels, with aggregation of lymphoid cells (arrow) (H&E, x400).
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F4
Aggregations of lymphocytes were between the LAM cells, representing vestiges of preexisting lymph nodes (Fig. 4).
The perivascular epithelioid cells express strong cytoplasmic positivity for HMB-45 (x200).
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F5
San Ramon, CA, U.S.A.), and HMB-45 (Dako) (Fig. 5). S-100 protein (DiNonA Inc. Seoul, Korea), cytokeratin (Dako), chromogranin (Zymed), and CD 34 (Immunotec, Marseille, Cedex, France) were negative.
A chest CT scan shows diffuse small thin walled cystic lesions in both lung parenchymas with pleural effusion (arrow).
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F6
Chest CT scans showed diffuse, small, thin walled cystic lesions in both lung parenchymas with pleural effusion (Fig. 6).