Retroperitoneal extraskeletal osteosarcoma with cystic change arising from heterotopic ossification: a rare entity

Authors

  • Kiran Agarwal Professor, Department of Pathology, Lady Hardinge Medical College and Smt S.K. Hospital, Shaheed Bhagat Singh Marg, New Delhi 110001, India
  • Savita Agarwal Department of Pathology, Lady Hardinge Medical College and Smt S.K. Hospital, Shaheed Bhagat Singh Marg, New Delhi 110001, India
  • Lokesh Kumar Assistatnt Professor Department of Radiodiagnosis FH Medial College NH-2, Near Etmadpur Railway ovrbridge, Tundla, Firozabad, Uttar Pradesh

Keywords:

Extraskeletal, Osteosarcoma, Myosistis ossificans, Heterotopic ossification, Retroperitoneum.

Abstract

Extraskeletal osteosarcoma arising from myositis ossificans or heterotopic benign ossification is an extremely rare entity. Heterotopic ossification under rare circumstances may undergo malignant transformation and give rise to extraskeletal osteosarcoma however diagnosis of such transformation requires the presence of a remnant of the benign precursor lesion. Most of the cases reported as secondary extraskeletal osteosarcoma did not contain residual tissue of the previous benign condition and its presence was suggested solely on the basis of clinical course without any histopathological or radiological evidences. We describe a case of secondary extraskeletal osteosarcoma of retroperitoneum showing morphologic evidence of heterotopic benign ossification with extensive cystic change in an eighty- five year old female.

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Published

03-02-2015

How to Cite

1.
Agarwal K, Agarwal S, Kumar L. Retroperitoneal extraskeletal osteosarcoma with cystic change arising from heterotopic ossification: a rare entity. Ann of Pathol and Lab Med [Internet]. 2015 Feb. 3 [cited 2024 Nov. 5];2(1):C42-C46. Available from: https://pacificejournals.com/journal/index.php/apalm/article/view/128

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Section

Case Report