{
 "serie": "s4_SAG_PD_FS",
 "n_imgs": 16,
 "s": 58.0,
 "respuesta": "**Right ankle MRI – sagittal PD fat-suppressed series only reviewed.**  \nAssessment of some ligaments/tendons is limited on sagittal images; axial/coronal sequences would be needed for definitive characterization.\n\n| Structure / location | Abnormal finding | Confidence |\n|---|---|---|\n| **Tibiotalar joint** | **Small to moderate joint effusion**, with fluid in the anterior and posterior recesses. Mild synovitis is possible given somewhat lobulated fluid/synovial signal. | **High** |\n| **Posterior ankle / flexor hallucis longus region** | Fluid signal extends in the posterior ankle region and likely along the **FHL tendon sheath**, compatible with mild FHL tenosynovitis or communication with ankle joint fluid. Tendon itself appears intact on these sagittal images. | **Medium** |\n| **Sinus tarsi / lateral hindfoot soft tissues** | Increased fluid/edema-like signal in the sinus tarsi/lateral gutter region, possibly synovitis or a small ganglion-type fluid collection. | **Medium** |\n| **Lateral ankle ligament region** | On the lateral sagittal slices, the expected region of the **ATFL/lateral ligament complex** appears somewhat ill-defined/thickened with surrounding fluid/synovial signal, suspicious for chronic sprain/scarring; not well evaluated on this plane. | **Low–medium** |\n| **Peroneal tendon sheath region** | Mild fluid signal about the retromalleolar/inframalleolar peroneal tendon region, suggesting mild peroneal tenosynovitis. No definite tendon discontinuity or split tear is evident on this sagittal series. | **Medium–low** |\n| **Talar dome / cartilage** | Tiny subchondral cystic-appearing focus in the talar dome/body region; no definite overlying full-thickness cartilage defect or unstable osteochondral fragment is visible on this series. Could represent a small chronic osteochondral/subchondral cystic change. | **Low–medium** |\n| **Anterior ankle margins** | Mild anterior tibiotalar marginal irregularity/spurring may be present, which can be seen with chronic anterior ankle impingement/early degenerative change. | **Low–medium** |\n\n**Structures grossly without abnormality on this series:**  \n- No acute fracture or conspicuous marrow edema identified.  \n- Achilles tendon appears intact without definite tear.  \n- Plantar fascia appears grossly intact without clear fasciitis on these slices.  \n- No high-grade tibiotalar cartilage loss is evident on the sagittal images provided."
}