Imprint cytology of extraskeletal mesenchymal chondrosarcoma of the perineum: a case report.
BACKGROUND
Extraskeletal mesenchymal chondrosarcoma (EMC) is an uncommon soft tissue tumor, occurring mainly in the lower limbs, meninges and retroperitoneum. EMC of the female genital tract is extremely rare, and the cytologic literature is scarce.


METHODS
A 43-year-old female with a growing perineal mass underwent excision of the tumor. Pathologic examination of the rumor revealed a characteristic two-cell pattern of primitive small cells and cartilaginous tissue. A diagnosis of EMC of the perineum was made. Imprint cytology from surgical material showed a cluster of small round cells with a focal hemangiopericytomalike arrangement and islets of cartilage. The cartilaginous cells reacted with S-100 protein immunocytochemically.


CONCLUSIONS
The characteristic features of EMC, a hemangiopericytomalike arrangement of small cells and S-100-positive cartilaginous cells, may be helpful in diagnosing EMC and differentiating it from other perineal tumors.
Morimura
Yutaka
Y
Department of Gynecology, Tsuboi Hospital, Jizankai Medical Institute, Koriyama, Japan.
Fujimori
Keiya
K
Sato
Tomoko
T
Watanabe
Takafumi
T
Sato
Akira
A
D000328:Adult; D000971:Antineoplastic Combined Chemotherapy Protocols / Q000627:therapeutic use; D014408:Biomarkers, Tumor / Q000096:biosynthesis; D002467:Cell Nucleus / Q000473:pathology; D019902:Chondrocytes / Q000473:pathology; D018211:Chondrosarcoma, Mesenchymal / Q000000981:diagnostic imaging / Q000473:pathology* / Q000628:therapy; D003131:Combined Modality Therapy; D005260:Female; D006801:Humans; D008175:Lung Neoplasms / Q000000981:diagnostic imaging / Q000556:secondary* / Q000628:therapy; D009364:Neoplasm Recurrence, Local; D010502:Perineum / Q000473:pathology*; D012086:Reoperation; D009418:S100 Proteins / Q000378:metabolism; D014057:Tomography, X-Ray Computed; D014626:Vaginal Smears
D014408:Biomarkers, Tumor; D009418:S100 Proteins