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MRI characteristics of cysts and "cyst-like" lesions in and around the knee: what the radiologist needs to know.

Perdikakis E, Skiadas V - Insights Imaging (2013)

Bottom Line: A variety of benign cystic or "cyst-like" lesions may be encountered during a routine magnetic resonance imaging (MRI) of the knee.In addition, normal anatomic bursae and recesses may be misdiagnosed as an intra-articular cystic lesion when they are distended.However, the majority of the aforementioned lesions have characteristic MR appearances that allow a confident diagnosis, thus obviating the need for additional imaging or interventional procedures.

View Article: PubMed Central - PubMed

Affiliation: Department of Radiology, 412 General Military Hospital-212 Mobile Army Surgical Hospital, Terma Lefkou Pyrgou, Xanthi, 67100, Greece, perdikakis_ev@yahoo.gr.

ABSTRACT

Objectives and methods: A variety of benign cystic or "cyst-like" lesions may be encountered during a routine magnetic resonance imaging (MRI) of the knee. These lesions comprise a diverse group of entities from benign cysts to complications of underlying diseases. In addition, normal anatomic bursae and recesses may be misdiagnosed as an intra-articular cystic lesion when they are distended. However, the majority of the aforementioned lesions have characteristic MR appearances that allow a confident diagnosis, thus obviating the need for additional imaging or interventional procedures.

Results: This article includes a comprehensive pictorial essay of the characteristic MRI features of common and uncommon benign cysts and "cyst-like" lesions in and around the knee joint.

Discussion: For accurate assessment of the "cystic structure", a radiologist should be able to identify typical MRI patterns that contribute in establishing the correct diagnosis and thus guiding specific therapy and avoiding unwarranted interventional procedures such as biopsy or arthroscopy.

Teaching points: • Cystic lesions are common in knee MRI and the commonest, the Baker's cyst, has an incidence of 38 %. • Synovial cysts, meniscal cysts, normal knee bursae and recesses have characteristic MR appearances. • Miscellaneous "cyst-like" lesions may require a more dedicated MR protocol for a correct diagnosis.

No MeSH data available.


Related in: MedlinePlus

Knee recesses. The sagittal (a) fat saturated proton density weighted image shows fluid in the subpopliteal-subgastrocnemius (white arrow) and posterior femoral recess (black arrow). Findings of ACL reconstruction are also visible (in dotted line). The axial (b) fat saturated proton density weighted image shows a fluid distended posterior capsular recess which is located posteriorly to the PCL. The axial (c) fat saturated proton density weighted image shows fluid in the subpopliteal recess (white arrow). A Baker cyst (with asterisk) and geodes (black arrows) at both tibial condyles are also shown. The axial (d) fat saturated proton density weighted image shows the central recesses (white arrows) with fluid extending medially and laterally deep to the patellar retinacula
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Fig21: Knee recesses. The sagittal (a) fat saturated proton density weighted image shows fluid in the subpopliteal-subgastrocnemius (white arrow) and posterior femoral recess (black arrow). Findings of ACL reconstruction are also visible (in dotted line). The axial (b) fat saturated proton density weighted image shows a fluid distended posterior capsular recess which is located posteriorly to the PCL. The axial (c) fat saturated proton density weighted image shows fluid in the subpopliteal recess (white arrow). A Baker cyst (with asterisk) and geodes (black arrows) at both tibial condyles are also shown. The axial (d) fat saturated proton density weighted image shows the central recesses (white arrows) with fluid extending medially and laterally deep to the patellar retinacula

Mentions: The parameniscal recess lies just superior and inferior to the level of the lateral meniscus in contact with the lateral femoral and tibial condyle (Figs. 21 and 22).Fig. 21


MRI characteristics of cysts and "cyst-like" lesions in and around the knee: what the radiologist needs to know.

Perdikakis E, Skiadas V - Insights Imaging (2013)

Knee recesses. The sagittal (a) fat saturated proton density weighted image shows fluid in the subpopliteal-subgastrocnemius (white arrow) and posterior femoral recess (black arrow). Findings of ACL reconstruction are also visible (in dotted line). The axial (b) fat saturated proton density weighted image shows a fluid distended posterior capsular recess which is located posteriorly to the PCL. The axial (c) fat saturated proton density weighted image shows fluid in the subpopliteal recess (white arrow). A Baker cyst (with asterisk) and geodes (black arrows) at both tibial condyles are also shown. The axial (d) fat saturated proton density weighted image shows the central recesses (white arrows) with fluid extending medially and laterally deep to the patellar retinacula
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

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getmorefigures.php?uid=PMC3675245&req=5

Fig21: Knee recesses. The sagittal (a) fat saturated proton density weighted image shows fluid in the subpopliteal-subgastrocnemius (white arrow) and posterior femoral recess (black arrow). Findings of ACL reconstruction are also visible (in dotted line). The axial (b) fat saturated proton density weighted image shows a fluid distended posterior capsular recess which is located posteriorly to the PCL. The axial (c) fat saturated proton density weighted image shows fluid in the subpopliteal recess (white arrow). A Baker cyst (with asterisk) and geodes (black arrows) at both tibial condyles are also shown. The axial (d) fat saturated proton density weighted image shows the central recesses (white arrows) with fluid extending medially and laterally deep to the patellar retinacula
Mentions: The parameniscal recess lies just superior and inferior to the level of the lateral meniscus in contact with the lateral femoral and tibial condyle (Figs. 21 and 22).Fig. 21

Bottom Line: A variety of benign cystic or "cyst-like" lesions may be encountered during a routine magnetic resonance imaging (MRI) of the knee.In addition, normal anatomic bursae and recesses may be misdiagnosed as an intra-articular cystic lesion when they are distended.However, the majority of the aforementioned lesions have characteristic MR appearances that allow a confident diagnosis, thus obviating the need for additional imaging or interventional procedures.

View Article: PubMed Central - PubMed

Affiliation: Department of Radiology, 412 General Military Hospital-212 Mobile Army Surgical Hospital, Terma Lefkou Pyrgou, Xanthi, 67100, Greece, perdikakis_ev@yahoo.gr.

ABSTRACT

Objectives and methods: A variety of benign cystic or "cyst-like" lesions may be encountered during a routine magnetic resonance imaging (MRI) of the knee. These lesions comprise a diverse group of entities from benign cysts to complications of underlying diseases. In addition, normal anatomic bursae and recesses may be misdiagnosed as an intra-articular cystic lesion when they are distended. However, the majority of the aforementioned lesions have characteristic MR appearances that allow a confident diagnosis, thus obviating the need for additional imaging or interventional procedures.

Results: This article includes a comprehensive pictorial essay of the characteristic MRI features of common and uncommon benign cysts and "cyst-like" lesions in and around the knee joint.

Discussion: For accurate assessment of the "cystic structure", a radiologist should be able to identify typical MRI patterns that contribute in establishing the correct diagnosis and thus guiding specific therapy and avoiding unwarranted interventional procedures such as biopsy or arthroscopy.

Teaching points: • Cystic lesions are common in knee MRI and the commonest, the Baker's cyst, has an incidence of 38 %. • Synovial cysts, meniscal cysts, normal knee bursae and recesses have characteristic MR appearances. • Miscellaneous "cyst-like" lesions may require a more dedicated MR protocol for a correct diagnosis.

No MeSH data available.


Related in: MedlinePlus