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Patellar metastasis from primary tumor.

Gang Li1,2, Changxing Shan3, Ran Sun4,5

  • 1Department of Orthopaedics, The First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning 116011, P.R. China.

Oncology Letters
|February 14, 2018
PubMed
Summary
This summary is machine-generated.

Patellar metastases, rare bone tumors in the knee, often present as knee pain and can be misdiagnosed. Lung and kidney cancers are common origins for these rare patellar metastases.

Keywords:
diagnosispatellapatellar metastasissurgerysymptom

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Area of Science:

  • Oncology
  • Orthopedic Surgery
  • Radiology

Background:

  • Primary patellar tumors are rare, with patellar metastases being even rarer.
  • Knee pain is the most frequent symptom reported by patients with patellar metastases.
  • The low incidence of patellar metastases contributes to a significant rate of misdiagnosis.

Purpose of the Study:

  • To review and consolidate information on patellar metastases from various primary tumor sites.
  • To analyze the relative incidence, clinical presentation, imaging characteristics, and histopathology of patellar metastatic lesions.
  • To discuss current treatment options and highlight the need for integrated information on this rare condition.

Main Methods:

  • Systematic literature review analyzing approximately 44 reported cases of patellar metastases.
  • Compilation of data on primary tumor origins, patient symptomatology, and diagnostic features.
  • Review of histopathological findings and therapeutic interventions for patellar metastases.

Main Results:

  • Malignant tumors of the lung and kidney were the most frequent primary sites for patellar metastases.
  • Analysis included relative incidence, symptomatology, imaging features, and histopathology of these lesions.
  • Despite research, the precise mechanism of tumor implantation in the patella remains unclear.

Conclusions:

  • Patellar metastases, though rare, require careful consideration due to potential misdiagnosis.
  • Integrated information on diagnosis and treatment of patellar metastases is increasingly relevant.
  • Further research may be needed to fully elucidate the mechanisms of patellar tumor spread.