An experimental recurrence model for malignant fibrous histiocytoma induced by 4-hydroxyaminoquinoline 1-oxide in the rat

✍ Scribed by Dr. Masaji Tanuma; Kunihiko Goto; Hiroshi Nagura; Minoru Sakurai

• Publisher: John Wiley and Sons
• Year: 1993
• Tongue: English
• Weight: 599 KB
• Volume: 52
• Category: Article
• ISSN: 0022-4790
• DOI: 10.1002/jso.2930520413

✦ Synopsis

Abstract

To clarify the relationship between local recurrence of mesenchymal tumors and their malignant potentiality, we made an experimental recurrence model for malignant fibrous histiocytoma (MFH) induced by 4‐hydroxyaminoquinoline 1‐oxide in the rat by repeated exicisional operations. By the repeated exicision, the number of recurrent tumors increased, and the doubling time of tumor growth was shortened. The mean doubling time of primary tumors was 6.6 days, that of the first locally recurrent tumors was 4.3 days, and that of the second locally recurrent tumors was 3.3 days. However, mitotic count and 5‐bromo‐2‐deoxyuridine (BrdU) labeling index did not change. this study proved experimentally that MFH shows more rapid growth through repeated local recurrences, and this experimental model may provide a better understanding of the local recurrence of MFH. © 1993 Wiley‐Liss, Inc.