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  • Title: Multicentric giant cell tumor of bone: Case series of 4 patients.
    Author: Kito M, Matsumoto S, Ae K, Tanizawa T, Gokita T, Hayakawa K, Funauchi Y, Takazawa Y.
    Journal: J Orthop Sci; 2017 Nov; 22(6):1107-1111. PubMed ID: 28869118.
    Abstract:
    BACKGROUND: We aimed to retrospectively investigate patients with multicentric giant cell tumor (MCGCT) who were treated at our hospital and to clarify their clinical features, treatment policy, and follow-up method. METHODS: Four patients with two or more giant cell tumor (GCT) that occurred in the same patient were treated at our institution between 1978 and 2015. These patients were evaluated for the following: frequency, age of onset, number and site of occurrence, time to occurrence of the next lesion, treatment, recurrence, malignant transformation, metastasis, and oncological outcome. RESULTS: The rate of occurrence was 1.7%. The average age was 25.2 (17-44). The total number of lesions was three in two cases and two in two cases. All four cases had only one lesion during the initial visit. The most frequent site of occurrence was the proximal femur, followed by two lesions that occurred in the metaphysis. The interval between confirmation of the initial lesion and occurrence of the second lesion was in average 12.1 years (0.8-27.0). Initial presentations of lesions were treated by en bloc resection in one case and curettage in three cases. Local recurrences occurred in two cases that underwent curettage. The six lesions that occurred after the initial lesion were treated as follows: en bloc resection in four lesions, curettage and radiation therapy in one, and embolization and radiation therapy in one. Pathologically, no lesions presented malignancy. Pulmonary metastasis occurred in one case. The oncological outcome was NED in three cases and AWD in one case. CONCLUSIONS: No lesions were malignant, and by providing the same treatment as solitary GCT, the oncological outcome was good. It is unnecessary to be concerned of its risks and postoperatively conduct long-term searches for focal lesions across the body.
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