{
 "serie": "s6_COR_2D_MERGE",
 "n_imgs": 22,
 "s": 50.3,
 "respuesta": "Limited assessment based on the provided coronal 2D MERGE series only.\n\n## Abnormal findings\n\n1. **Tibiotalar joint effusion / synovitis**\n   - **Location:** Ankle mortise, medial and lateral gutters, anterior/posterior tibiotalar recesses.\n   - **Description:** Mild-to-moderate joint fluid distending the tibiotalar joint, most conspicuous in the gutters and posterior recess. Mild synovial thickening is possible.\n   - **Confidence:** **High**\n\n2. **Focal osteochondral/cartilage abnormality of the talar dome**\n   - **Location:** Medial talar dome/medial talar shoulder.\n   - **Description:** Small focal irregularity of the articular surface/subchondral bone with suspected overlying cartilage thinning or fissuring. No large displaced osteochondral fragment is visible on these images.\n   - **Confidence:** **Medium**\n\n3. **Small subtalar joint effusion**\n   - **Location:** Posterior subtalar joint.\n   - **Description:** Small amount of fluid in the posterior subtalar joint space.\n   - **Confidence:** **Medium**\n\n4. **Possible chronic deltoid ligament abnormality**\n   - **Location:** Medial ankle, deep/superficial deltoid region adjacent to the medial malleolus and medial talar shoulder.\n   - **Description:** Deltoid ligament fibers appear mildly thickened/heterogeneous on the coronal images, without a definite complete tear. This may reflect chronic sprain/scarring. Small medial gutter fluid is present.\n   - **Confidence:** **Low-to-medium**\n\n5. **Possible mild flexor hallucis longus tenosynovitis**\n   - **Location:** Posterior ankle/hindfoot, FHL tendon sheath region.\n   - **Description:** Small amount of fluid-like signal along the expected course of the FHL tendon sheath posteriorly; difficult to separate from adjacent joint fluid on this sequence.\n   - **Confidence:** **Low**\n\n## Structures without definite abnormality on this series\n\n- **Bones:** No acute fracture, dislocation, or aggressive osseous lesion evident on these coronal images.  \n- **Tibiotalar alignment:** Preserved ankle mortise alignment.  \n- **Lateral ligaments/syndesmosis:** No definite complete tear seen, though ATFL and syndesmotic ligaments are incompletely assessed on this coronal series.  \n- **Peroneal tendons:** No definite tear, dislocation, or marked tenosynovitis visible.  \n- **Medial flexor tendons other than possible FHL sheath fluid:** Posterior tibial and flexor digitorum longus tendons appear grossly intact on these images.  \n- **Achilles tendon:** Grossly intact where visualized.  \n- **Soft tissues:** No focal soft-tissue mass or drainable collection evident."
}