Chondroblastoma associated with aneurysmal cyst of the navicular bone: a case report
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WORLD JOURNAL OF SURGICAL ONCOLOGY
CASE REPORT
Open Access
Chondroblastoma associated with aneurysmal cyst of the navicular bone: a case report Zhenhua Fang and Ming Chen*
Abstract Chondroblastoma is a rare tumor. It is usually benign; however, it can have an aggressive course before or after operative treatment, even resulting in pulmonary metastases. The foot is a rare location for chondroblastoma, and to our knowledge, chondroblastoma occurring in the navicular bone has not been reported previously in the English literature. We describe a case of navicular chondroblastoma case associated with an aneurysmal bone cyst. Treatment consisted of aggressive curettage, phenolization, and bone allograft. The patient was able to resume normal activities after treatment, and there was no recurrence of the chondroblastoma during a follow-up of 3 years. Keywords: Chondroblastoma, Aneurysmal bone cyst, Navicular, Surgery
Background Chondroblastoma was first identified by Jaffe and Lichtenstein in 1942 [1]. It is a rare and usually benign bone tumor, which accounts for approximately 1% of all benign bone tumors [2]. There is a male preponderance, and there is a relatively higher frequency of chondroblastoma in the epiphyses of the long bones in adolescents. The two most common tumor locations are the proximal humerus and proximal tibia, with a male:female ratio of 2:1 [2-4]. Generally, the foot is a rare location for chondroblastoma, and approximately 20% of foot chondroblastomas occur in the calcaneus and talus bones [5]. In addition, there have been a few reported cases of chondroblastoma occurring on the cuboid bones [3,6,7]. To our knowledge, chondroblastoma of the navicular bone has not been reported previously in the English literature. We report a case of and successful management of a navicular chondroblastoma associated with an aneurysmal bone cyst. Case presentation A 24-year-old woman presented to the local clinic with pain in her left foot. She denied having any recent * Correspondence: [email protected] Department of Orthopedics, PuAi Hospital, affiliated to TongJi medical college, HuaZhong University of Science and Technology, Hanzheng Jie No. 473, Qiaokou District, Wuhan 430033, China
fevers, and she did not have any history of foot or ankle trauma. The rest of her medical history was not significant. The patient was initially treated conservatively with medication and rest. However, the pain gradually worsened, and began to be apparent even at rest. At this stage (about 6 months after her initial presentation), the patient was referred to our clinic for further treatment. During the physical examination, the patient reported tenderness in the region of the navicular bone in her left foot, but there was no palpable mass in this area, and the temperature of the skin over the navicular bone was normal. The patient was unable to bear weight on her left foot, and the motor function of the foot was difficult to assess because of the pain. Anteroposterior and lateral radiographs of the left foot were taken, which
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