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Knee Joint

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Related Experiment Video

Updated: Aug 4, 2025

Author Spotlight: Double Posteromedial Approach for Treating Posterior Cruciate Ligament Cysts

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Published on: October 20, 2023

Bilateral Simultaneous Primary Patellar Giant Cell Tumors.

Fahri Aydin¹, Hayri Ogul², Kutsi Tuncer³

¹Department of Radiology, Medical Faculty, Ataturk University, Erzurum, Turkey.

Indian Journal of Orthopaedics

|April 3, 2023

Summary

Giant cell tumors are common benign bone tumors. This report details a rare case of simultaneous bilateral patellar giant cell tumors, a condition not previously documented.

Keywords:

Bilateral Giant cell tumor MR imaging Patella

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Last Updated: Aug 4, 2025

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Published on: September 9, 2020

Area of Science:

Orthopedic Oncology
Radiology
Pathology

Background:

Giant cell tumor (GCT) is a frequent benign bone neoplasm, typically found in the epiphyseal-metaphyseal regions of long bones.
Radiological imaging, including CT and MRI, often reveals characteristic signs like cortical thinning and endosteal scalloping in GCTs.
GCTs present as heterogeneous masses with components such as cystic areas and hemorrhage.

Observation:

Giant cell tumors of the bone are generally found in long bones.
Patellar involvement by GCT is uncommon.
This report describes an exceptionally rare instance of simultaneous bilateral giant cell tumors in the patellae.

Findings:

The study highlights an unprecedented case of bilateral patellar giant cell tumors occurring concurrently.
This presentation is unique, as no prior literature documents bilateral patellar GCTs.
Radiological features consistent with GCT were observed in both patellae.

Implications:

This case expands the known clinical spectrum of giant cell tumors.
It underscores the importance of considering rare presentations in differential diagnoses for patellar lesions.
Further investigation may be warranted to understand the etiology of bilateral GCTs in this specific location.