CC BY-NC-ND 4.0 · Rev Bras Ortop (Sao Paulo) 2020; 55(02): 258-262
DOI: 10.1016/j.rbo.2018.02.003
Relato de Caso
Tumor
Sociedade Brasileira de Ortopedia e Traumatologia. Published by Thieme Revinter Publicações Ltda Rio de Janeiro, Brazil

Intraosseous Schwannoma: Case Report and Review of the Literature[*]

Article in several languages: português | English
1  Hospital AC Camargo Câncer Center de São Paulo, São Paulo, SP, Brasil
,
Suely Akiko Nakagawa
1  Hospital AC Camargo Câncer Center de São Paulo, São Paulo, SP, Brasil
,
Felipe D'Almeida Costa
1  Hospital AC Camargo Câncer Center de São Paulo, São Paulo, SP, Brasil
,
Murilo Yokoo Teodoro de Souza
1  Hospital AC Camargo Câncer Center de São Paulo, São Paulo, SP, Brasil
,
Juliane Comunello
1  Hospital AC Camargo Câncer Center de São Paulo, São Paulo, SP, Brasil
,
Wu Tu Chung
1  Hospital AC Camargo Câncer Center de São Paulo, São Paulo, SP, Brasil
› Author Affiliations
Further Information

Publication History

16 October 2017

21 February 2018

Publication Date:
19 December 2019 (online)

Abstract

Schwannoma is a benign neural sheath tumor of the soft tissue, and its intraosseous presentation is very rare. It is estimated that intraosseous schwannomas represent 0.2% of all bone tumors. The tumor may affect any site of the skeleton, including the mandible, the sacrum, vertebral bodies, the ulna, the humerus, the femur, the tibia, the patella, the scapula, the ribs, and small bones of the hand. The involvement of the calcaneus has only been reported four times in the literature. The present study reports the case of a 49-year-old male with right hindfoot pain and a radiological finding of an osteolytic bone lesion in the calcaneus. The diagnosis was confirmed by histopathological study. The treatment of choice was an intralesional resection with adjuvant local control, and bone defect substitution with polymethylmethacrylate and fixation with two cannulated screws. The patient had a satisfactory postoperative evolution; after 1 year, he is asymptomatic, with good functional response and no evidence of disease. The present case report shows the clinical, radiological, and pathological features of a rare benign bone neoplasm. Moreover, intraosseous schwannoma should be included in the differential diagnosis of osteolytic calcaneal lesions.

* Originally Published by Elsevier Editora Ltda.