Luminita Enache1, Claudiu Costinel Popescu2, Mihaela Micu3, Adriana Cojocaru4, Victoria-Cristina Suta5, Maria Suta6, Catalin Codreanu7. 1. "Dr. Ion Stoia" Clinical Centre of Rheumatic Diseases (Bucharest). luminita_v2000@yahoo.com. 2. "Dr. Ion Stoia" Clinical Centre of Rheumatic Diseases (Bucharest). claudiu.popescu@reumatologiedrstoia.ro. 3. Rheumatology Division, 2nd Rehabilitation Department, Rehabilitation Clinical Hospital Cluj Napoca. mcmicu@yahoo.com. 4. "Iuliu Hatieganu" University of Medicine and Pharmacy (Cluj-Napoca). adi.cojocaru@yahoo.com. 5. "Ovidius" University of Constanța, Faculty of Medicine. cris_duminica@yahoo.com. 6. "Ovidius" University of Constanța, Faculty of Medicine. mariasuta@yahoo.com. 7. "Dr. Ion Stoia" Clinical Centre of Rheumatic Diseases (Bucharest). ccodreanu01@gmail.com.
Abstract
AIM: To evaluate the frequency of tibiotalar and subtalar joints together with extensor, flexor and peroneal tendons inflammatory lesions in rheumatoid arthritis (RA) patients by using ultrasound (US) and magnetic resonance imaging (MRI). MATERIAL AND METHODS: Fifty RA patients and 25 healthy subjects were prospectively included. All patients and controlsunderwent clinical examination (to screen for swollen and/or tender ankles) and ankle US and MRI (to screen for synovialhypertrophy - SH, tenosynovitis and power Doppler - PD signals). The imaging tests were compared using overall agreement, positive agreement, Cohen's κ, sensitivity, specificity and positive likelihood ratio. RESULTS: The subtalar joint had the highest frequency of US-detected SH (30%), as well as positive PD signals (10%). Regarding US joint effusion, the tibiotalar joint recorded the highest frequency (44%). The most frequent US tenosynovitis was detected in the tibialis posterior tendon (40%). Compared to MRI, US evaluation of tibiotalar joints had very good agreement and large effect on detection probability for both SH and effusion (kappa 0.84, positive likelihood ratio 21.1). Compared to MRI, the sensitivity and specificity for US joint involvement ranged between 72.0-88.5% and 82.4-95.8%, and for tenosynovitis were 33.3-78.6% and 85.2-100%, respectively. Compared to asymptomatic RA patients (n=25), those with at least one symptomatic ankle (n=25) had significantly higher frequencies of both SH and effusion in all the evaluated structures. CONCLUSION: US has high sensitivity and specificity in detecting RA inflammatory lesions in the ankle and rearfoot, in very good agreement with MRI. The high frequency of ankle inflammatory lesions in RA should result in increased interest in the imaging evaluation of these structures.
AIM: To evaluate the frequency of tibiotalar and subtalar joints together with extensor, flexor and peroneal tendons inflammatory lesions in rheumatoid arthritis (RA) patients by using ultrasound (US) and magnetic resonance imaging (MRI). MATERIAL AND METHODS: Fifty RApatients and 25 healthy subjects were prospectively included. All patients and controlsunderwent clinical examination (to screen for swollen and/or tender ankles) and ankle US and MRI (to screen for synovialhypertrophy - SH, tenosynovitis and power Doppler - PD signals). The imaging tests were compared using overall agreement, positive agreement, Cohen's κ, sensitivity, specificity and positive likelihood ratio. RESULTS: The subtalar joint had the highest frequency of US-detected SH (30%), as well as positive PD signals (10%). Regarding US joint effusion, the tibiotalar joint recorded the highest frequency (44%). The most frequent US tenosynovitis was detected in the tibialis posterior tendon (40%). Compared to MRI, US evaluation of tibiotalar joints had very good agreement and large effect on detection probability for both SH and effusion (kappa 0.84, positive likelihood ratio 21.1). Compared to MRI, the sensitivity and specificity for US joint involvement ranged between 72.0-88.5% and 82.4-95.8%, and for tenosynovitis were 33.3-78.6% and 85.2-100%, respectively. Compared to asymptomatic RApatients (n=25), those with at least one symptomatic ankle (n=25) had significantly higher frequencies of both SH and effusion in all the evaluated structures. CONCLUSION: US has high sensitivity and specificity in detecting RA inflammatory lesions in the ankle and rearfoot, in very good agreement with MRI. The high frequency of ankle inflammatory lesions in RA should result in increased interest in the imaging evaluation of these structures.