Giant cell tumor of the pubic bone with concomitant enchondroma: a case report - Report - MDSpire

Giant cell tumor of the pubic bone with concomitant enchondroma: a case report

  • By

  • Hongjing Sun

  • Minghao Gao

  • Hong Yu

  • Xiaohui Feng

  • May 12, 2026

  • 0 min

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Clinical Report: Concurrent Giant Cell Tumor and Enchondroma of the Pubic Bone

Overview

This report presents a rare case of concurrent giant cell tumor of bone (GCTB) and enchondroma in the left pubic bone of a 36-year-old female. Histopathological analysis revealed distinct tumor components, highlighting the importance of accurate diagnosis in unusual tumor presentations.

Background

Giant cell tumor of bone (GCTB) is a locally aggressive neoplasm that accounts for 4%-5% of primary bone tumors, primarily affecting young adults. Enchondroma, a benign cartilaginous tumor, is less common in the pelvis. The coexistence of these two tumors at the same site is exceedingly rare, necessitating careful clinical and histopathological evaluation.

Data Highlights

No numerical data or trial data presented in the article.

Key Findings

  • The case involves a 36-year-old female with left hip pain due to GCTB and enchondroma.
  • Imaging revealed an osteolytic lesion in the left pubic bone, characteristic of GCTB.
  • Histopathological analysis showed regions of GCTB coexisting with enchondroma.
  • The GCTB component exhibited a Ki-67 proliferation index of 40%, indicating aggressive potential.
  • This case is one of only two documented instances of GCTB coexisting with enchondroma.

Clinical Implications

The presence of both GCTB and enchondroma in the same anatomical location underscores the need for thorough histopathological assessment in bone tumors. Clinicians should be aware of this rare combination to ensure accurate diagnosis and appropriate management.

Conclusion

This case highlights the rarity of concurrent GCTB and enchondroma in the pubic bone, emphasizing the importance of histopathological evaluation in diagnosing complex bone tumors.

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  2. Frontiers in Surgery, 2026 -- Primary giant chondrosarcoma of the manubrium sterni
  3. Clinical and Radiological Evaluation of 18 Cases of Vascular Bone Tumors in the Pelvis and Extremities
  4. UK guidelines for the management of bone sarcomas | British Journal of Cancer
  5. Knee Surgery, Sports Traumatology, Arthroscopy — Endoscopic excision of an acetabular osteoid osteoma
  6. UK guidelines for the management of bone sarcomas | British Journal of Cancer
  7. Denosumab in patients with giant-cell tumour of bone: a multicentre, open-label, phase 2 study - ScienceDirect

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