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Three-Dimensional Bone Extracellular Matrix Model for Osteosarcoma

Three-Dimensional Bone Extracellular Matrix Model for Osteosarcoma

Published on: April 12, 2019

Small cell extraskeletal osteosarcoma.

Jun Young Yang¹, Jin Man Kim

¹Chungnam National University School of Medicine, Daejeon, Korea.

|March 25, 2009

Summary

This summary is machine-generated.

A rare small cell extraskeletal osteosarcoma in the semimembranosus muscle was successfully treated with surgery, chemotherapy, and radiation. This case highlights effective management for this aggressive soft tissue sarcoma.

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Published on: May 6, 2018

Area of Science:

Orthopedic Oncology
Soft Tissue Pathology
Skeletal Muscle Neoplasms

Background:

Extraskeletal osteosarcoma is a rare malignant mesenchymal neoplasm.
Small cell extraskeletal osteosarcoma is an extremely rare subtype.
This condition accounts for <4% of all osteosarcomas and 1.2% of soft tissue sarcomas.

Observation:

A case study of a 31-year-old man with small cell extraskeletal osteosarcoma originating in the semimembranosus muscle.
Histopathology revealed small cells and osteoid formation, initially suggesting Ewing's sarcoma or PNET.
Immunohistochemistry showed CD99 and neuron-specific enolase reactivity.

Findings:

Final diagnosis confirmed as small cell extraskeletal osteosarcoma.
The patient underwent wide marginal resection, adjuvant chemotherapy (doxorubicin, ifosfamide, cisplatin), and radiation therapy (60 Gy).
At 2-year follow-up, no recurrence or metastasis was observed, with a good functional outcome (Enneking score 28).

Implications:

This case demonstrates a successful multimodal treatment approach for a rare and aggressive tumor.
Early diagnosis and comprehensive treatment are crucial for favorable outcomes in small cell extraskeletal osteosarcoma.
Further research into optimal treatment strategies for this rare entity is warranted.