An experimental recurrence model for malignant fibrous histiocytoma induced by 4-hydroxyaminoquinoline 1-oxide in the rat.
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 excisional operations. By the repeated excision, 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.
Department of Orthopaedic Surgery, Tohoku University School of Medicine, Sendai, Japan.
M
M
Tanuma
K
K
Goto
H
H
Nagura
M
M
Sakurai
D015108:4-Hydroxyaminoquinoline-1-oxide; D000818:Animals; D002455:Cell Division; D004195:Disease Models, Animal; D018219:Histiocytoma, Benign Fibrous / Q000139:chemically induced* / Q000473:pathology / Q000601:surgery; D008175:Lung Neoplasms / Q000556:secondary; D008297:Male; D008938:Mitosis; D009362:Neoplasm Metastasis; D009364:Neoplasm Recurrence, Local; D051381:Rats; D017208:Rats, Wistar
D015108:4-Hydroxyaminoquinoline-1-oxide