ISSN: 1307-279X
Reactive Pseudosarcomatous Lesions of Soft Tissues: Clinicopathologic Study of 13 Cases [YMJ]
YMJ. 2008; 2(5): 19-28

Reactive Pseudosarcomatous Lesions of Soft Tissues: Clinicopathologic Study of 13 Cases

Asiye Isin Dogan Ekici1, Gokhan Gedklioglu2, Sevket Ruacan2
1Assistant Professor of Pathology Yeditepe University School of Medicine Department of Pathology
2Professor of Pathology Hacettepe University School of Medicine Department of Pathology

Reactive pseudosarcomatous lesions of soft tissues are uncommon and challenging entities. They mimic sarcomas because of the clinical history of rapid growth and spindle cell proliferation. Some of these lesions are characterized by new bone or osteoid formation. In this report the clinical, histological, histochemical and immunohistochemical features of 13 cases of these reactive fibroproliferative lesions composed of an ossifying fasciitis, an aneurysmal bone cyst of soft tissue, 1 myositis ossificans, 3 proliferative fasciitis and 7 nodular fasciitis cases with follow ups between 8 months to 14 years, were analyzed. Some of those cases had a history of trauma. These lesions were collagen rich in Masson’s trichrome. Immunohistochemically; smooth muscle actin and vimentin were strongly positive. Our case of ossifying fasciitis is the 13th cases and aneurysmal bone cyst of soft tissue case is the 15th cases of the literature. As a result; clinical and morphological features of those entities were found similar to each other. Finally a unifying concept of fibroblastic and myofibroblastic proliferation in response to trauma, genetic and/or an unknown factor are proposed.

Keywords: Proliferative fasciitis, Ossifying fasciitis, Aneurysmal bone cyst of soft tissue, Myositis ossificans, and Nodular fasciitis.

Yumusak Dokunun Psödosarkomatöz Lezyonları: Klinikopatolojik Çalısma

Asiye Isin Dogan Ekici1, Gokhan Gedklioglu2, Sevket Ruacan2
1Assistant Professor of Pathology Yeditepe University School of Medicine Department of Pathology
2Professor of Pathology Hacettepe University School of Medicine Department of Pathology

Yumusak dokunun reaktif psödosarkomatöz lezyonları ender görülen ve ilginç lezyonlardır. Klinikte hızlı büyüme hikayeleri ve histopatolojik olarak iğsi hücre proliferasyonu nedeniyle sarkomları taklit ederler. Bu lezyonların bazıları yeni kemik yapımı veya osteoid olusumuyla karakterizedir. Bu makalede klinik takipleri 8 ay ile 14 yıl arasında değisen, birer ossifiyan fasiit,yumusak dokunun anevrizmal kemik kisti ve miyozitis ossifikans, 3 proliferatif fasiit ve 7 nodüler fasiit olgusundan olusan yumusak dokunun reaktif psödosarkomatöz lezyonlarından toplam 13 olgu klinik, histolojik, histokimyasal ve immünhistokimyasal özellikleri arastırılarak incelenmistir. Bu olguların bazılarında travma öyküsü mevcuttur. Bu lezyonlar Masson trichrome ile kollajenden zengindir. Immunhistokimyasal olarak; düz kas aktini ve vimentin kuvvetli pozitiftir. Ayrıca ossifiyan fasiit vakamız literatürde simdiye kadar bildirilmis 13. vaka olurken, yumusak dokunun anevrizmal kemik kisti vakamız ise literatürde simdiye kadar bildirilmis 15. vaka olma özelliğindedir. Sonuç olarak; tüm bu lezyonların klinik ve morfolojik özellikleri birbirlerine benzer nitelikte bulunmustur. Olusum mekanizmaları konusunda travmaya cevaben ortaya çıkan fibroblastik ve miyofibroblastik proliferasyon, genetik ve/veya henüz bilinmeyen baska faktörlerin varlığı düsünülmektedir.

Anahtar Kelimeler: Proliferatf fasiit, Ossifiyan fasiit, Yumusak dokunun anevrizmal kemik, Miyozitis ossifikans ve Noduler fasiit.

Asiye Isin Dogan Ekici, Gokhan Gedklioglu, Sevket Ruacan. Reactive Pseudosarcomatous Lesions of Soft Tissues: Clinicopathologic Study of 13 Cases. YMJ. 2008; 2(5): 19-28
Manuscript Language: English
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