{
 "serie": "s501_DP_SPAIR_TRA",
 "n_imgs": 24,
 "s": 50.4,
 "respuesta": "Based on the provided axial fat-suppressed PD ankle images only:\n\n## Abnormal findings\n\n1. **Tibiotalar joint**\n   - **Location:** Ankle joint, anterior recess and medial/lateral gutters.\n   - **Description:** Small-to-moderate joint effusion/synovial fluid.\n   - **Confidence:** **High**\n\n2. **Posterior subtalar joint / hindfoot joints**\n   - **Location:** Posterior subtalar region, extending around the posterior talus/calcaneus.\n   - **Description:** Small-to-moderate fluid in the posterior subtalar region, compatible with effusion/synovitis.\n   - **Confidence:** **High**\n\n3. **Flexor hallucis longus tendon sheath**\n   - **Location:** Posteromedial ankle/hindfoot, along the FHL tendon course posterior to the talus and into the medial hindfoot.\n   - **Description:** Prominent fluid surrounding the tendon, consistent with **FHL tenosynovitis**. Tendon substance appears grossly intact on these images.\n   - **Confidence:** **High**\n\n4. **Posteromedial flexor tendon sheaths**\n   - **Location:** Tarsal tunnel region/posteromedial ankle, around tibialis posterior/flexor digitorum longus region.\n   - **Description:** Mild additional fluid/edema around the posteromedial tendon bundle; may represent mild associated tenosynovitis, though some high-signal tubular structures may be vessels.\n   - **Confidence:** **Medium**\n\n5. **Anterolateral ankle ligament region**\n   - **Location:** Expected anterior talofibular ligament region, anterolateral ankle.\n   - **Description:** The ATFL region appears somewhat indistinct with adjacent fluid/edema, suspicious for sprain/partial tear. Definitive grading is limited on this axial series alone.\n   - **Confidence:** **Medium-Low**\n\n6. **Periarticular/subcutaneous soft tissues**\n   - **Location:** Circumferential ankle/hindfoot soft tissues, greatest laterally/anterolaterally and medially near the tarsal tunnel.\n   - **Description:** Mild nonspecific soft-tissue edema.\n   - **Confidence:** **Medium**\n\n## Structures without definite abnormality on these images\n\n- **Bones:** No acute fracture or definite focal marrow edema identified on this series. No definite osteochondral lesion is visible.\n- **Cartilage:** No clear focal cartilage defect is evident on the provided axial fat-suppressed images.\n- **Achilles tendon:** Appears intact.\n- **Peroneal tendons:** Grossly intact without convincing tear or significant tenosynovitis.\n- **Anterior extensor tendons:** Grossly intact.\n- **Deltoid ligament/CFL:** No definite tear identified on this limited axial review."
}