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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

Prepatellar bursitis. The axial (a), sagittal (b) fat saturated proton density weighted and the sagittal (c) T1-weighted images demonstrate a distended prepatellar bursa (asterisk)
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Fig15: Prepatellar bursitis. The axial (a), sagittal (b) fat saturated proton density weighted and the sagittal (c) T1-weighted images demonstrate a distended prepatellar bursa (asterisk)

Mentions: The prepatellar bursa is located anteriorly, between the patella and the subcutaneous tissues, adjacent to the proximal patellar tendon. Prepatellar bursitis is an inflammation of the prepatellar bursa either due to acute trauma (direct fall on to the knee) or to chronic repetitive microtrauma (housemaid’s knee, carpet-layer’s knee) [6, 8–10]. On MRI prepatellar bursitis presents as a focal fluid collection in all pulse sequences anterior to the patella and the superior part of the patellar tendon. However, inflammatory or haemorrhagic bursitis may present as a more complex, poorly defined, septated collection with heterogeneous signal intensity and internal debris (Fig. 15).Fig. 15


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)

Prepatellar bursitis. The axial (a), sagittal (b) fat saturated proton density weighted and the sagittal (c) T1-weighted images demonstrate a distended prepatellar bursa (asterisk)
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

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

Fig15: Prepatellar bursitis. The axial (a), sagittal (b) fat saturated proton density weighted and the sagittal (c) T1-weighted images demonstrate a distended prepatellar bursa (asterisk)
Mentions: The prepatellar bursa is located anteriorly, between the patella and the subcutaneous tissues, adjacent to the proximal patellar tendon. Prepatellar bursitis is an inflammation of the prepatellar bursa either due to acute trauma (direct fall on to the knee) or to chronic repetitive microtrauma (housemaid’s knee, carpet-layer’s knee) [6, 8–10]. On MRI prepatellar bursitis presents as a focal fluid collection in all pulse sequences anterior to the patella and the superior part of the patellar tendon. However, inflammatory or haemorrhagic bursitis may present as a more complex, poorly defined, septated collection with heterogeneous signal intensity and internal debris (Fig. 15).Fig. 15

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