Hemosiderotic synovitis: Highlighting the role of T2∗ weighted sequence in skeletal MRI

Feasibility of MRI in diagnosis and characterization of intra-articular synovial masses and mass-like lesions

“…In our study, the ganglion cyst was located at the infrapetallar region (Hofa's fat) near the meniscus displaying low signal at T1, mixed low and high signal at T2 and STIR, and was confirmed by arthroscopic removal of the lesion in agreement with [26]. Synovial hematoma was observed in one patient (3.1%) of the study group patients with history of trauma; CT in this patient reveals no fracture lines and US reveals effusion; MRI reveals mass-like lesion within the effusion displaying low signal hematoma with blooming effect at T2 in agreement with Vishal Kumar Jain et al [28] who mentioned that in intraarticular hemorrhage regardless the cause, ironcontaining hemosiderin is kept in synovial tissue forming proliferative reaction and rusty discoloration. This hemosiderin causes typical T2WI blooming along the synovium, as seen in our patient.…”

Post-Traumatic Hemosiderotic Synovitis of the Knee Mimicking Pigmented Villonodular Synovitis on Magnetic Resonance Imaging (MRI) in a Child: A Case Report

“…The age of presentation for knee HS reported in the literature is variable, ranging from 19 to 76 years [ 1 – 8 ] ( Table 1 ). This case report, to the best of our knowledge, represents the youngest reported patient with post-traumatic knee HS, and this added to the challenges in diagnosis.…”

“…Hemosiderotic synovitis (HS) is a distinctive type of proliferative synovial disorder that develops as a result of recurrent hemarthrosis [ 1 – 3 ]. It is most commonly caused secondary to hemophilia [ 1 , 2 , 4 , 5 ]. The most commonly involved joint is the knee [ 1 – 3 , 5 , 6 ].…”

“…It is most commonly caused secondary to hemophilia [ 1 , 2 , 4 , 5 ]. The most commonly involved joint is the knee [ 1 – 3 , 5 , 6 ].…”

“…Post-traumatic synovitis is a subtype of hemosiderotic synovitis (HS). Although sports injuries involving the knee are common, only a few reported cases are found in the literature describing this rare entity [ 1 – 8 ]. The exact cause and mechanism for the development of the long-term sequelae of such synovitis remain unknown [ 2 , 9 ].…”