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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.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. • 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.

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

LCL bursitis. The axial (a) and coronal (b) fat saturated proton density weighted images show a fluid collection in the dilated LCL bursa (asterisk). The white arrow points to LCL and the black arrow points to biceps femoris tendon
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Fig20: LCL bursitis. The axial (a) and coronal (b) fat saturated proton density weighted images show a fluid collection in the dilated LCL bursa (asterisk). The white arrow points to LCL and the black arrow points to biceps femoris tendon

Mentions: The fibular collateral ligament (FCL)-biceps femoris bursa is located superficial to the distal FCL and deep to the anterior arm of the long head of the biceps femoris muscle [1, 2, 6, 8]. On axial MR images it is demonstrated as a fluid collection around the FCL, forming an inverted J-shape, whose long arm extends along the lateral aspect of the FCL and the hook is curved around the anterior edge of the FCL. The proximal portion is at the superior edge of the anterior arm of the long head of the biceps femoris muscle and the distal one is at the insertion of the FCL on the fibula head (Fig. 20).Fig. 20


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)

LCL bursitis. The axial (a) and coronal (b) fat saturated proton density weighted images show a fluid collection in the dilated LCL bursa (asterisk). The white arrow points to LCL and the black arrow points to biceps femoris tendon
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3675245&req=5

Fig20: LCL bursitis. The axial (a) and coronal (b) fat saturated proton density weighted images show a fluid collection in the dilated LCL bursa (asterisk). The white arrow points to LCL and the black arrow points to biceps femoris tendon
Mentions: The fibular collateral ligament (FCL)-biceps femoris bursa is located superficial to the distal FCL and deep to the anterior arm of the long head of the biceps femoris muscle [1, 2, 6, 8]. On axial MR images it is demonstrated as a fluid collection around the FCL, forming an inverted J-shape, whose long arm extends along the lateral aspect of the FCL and the hook is curved around the anterior edge of the FCL. The proximal portion is at the superior edge of the anterior arm of the long head of the biceps femoris muscle and the distal one is at the insertion of the FCL on the fibula head (Fig. 20).Fig. 20

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.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. • 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.

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