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¹Department of Medical Pathology, Ankara Atatürk Training and Research Hospital, Ankara-Turkey
²Department of Medical Pathology, Bülent Ecevit University Faculty of Medicine, Zonguldak-Turkey DOI : 10.5505/tjo.2017.1621 Kaposi"s sarcoma (KS) is a vascular tumor with different epidemiological, clinical, and morphologic features, and KS-associated herpes virus plays role in its etiology. In the pathogenesis of these tumors, inflammatory, immunological, and oncogenic factors are closely related to each other. Classic KS is characterized by cutaneous lesions and mild clinical course. However, with the addition of various factors to the disease process, KS lesions can occur in unusual locations and cause unexpected clinical symptoms. In this study, we present a case of gastrointestinal system involvement in KS and lymphadenopathic KS following interstitial lung disease and steroid treatment in a 72-year-old male patient who was treated for cutaneous classic KS for 10 years. Histopathologic differential diagnosis of KS lesions seen in unusual localizations is discussed in the context of literature. Keywords : Gastrointestinal system; Kaposi