{
 "serie": "s601_T1W_aTSE",
 "n_imgs": 24,
 "s": 93.4,
 "respuesta": "Based on the provided uniformly sampled **coronal T1-weighted ankle MRI series only**:\n\n## Abnormal findings\n\n| Structure | Location | Description | Confidence |\n|---|---|---|---|\n| **Bone / osteochondral surface** | **Medial talar dome / medial talar shoulder** | Focal chronic-appearing osteochondral abnormality with subtle articular surface irregularity/flattening and subchondral low T1 signal/cystic-type change. No clearly displaced osteochondral fragment is visible on this sequence. | **Medium–high** |\n| **Cartilage / joint surface** | **Tibiotalar joint, greatest medially** | Mild focal cartilage/joint surface irregularity associated with the talar dome lesion. Cartilage assessment is limited on T1, but there is no gross diffuse full-thickness cartilage loss seen. | **Medium** |\n| **Degenerative/post-traumatic osseous change** | **Tibiotalar margins / gutters** | Mild chronic post-traumatic/degenerative spurring and marginal irregularity, including at the malleolar/talar gutter regions. | **Medium** |\n| **Possible chronic avulsion / accessory ossicle** | **Lateral malleolar tip / lateral gutter region** | Small corticated ossific focus or irregular ossific prominence near the fibular tip/lateral gutter, favored chronic post-traumatic avulsion-type change/os subfibulare rather than acute injury. | **Medium** |\n| **Ligaments** | **Lateral collateral ligament complex, especially fibular-tip attachments** | Lateral ligament fibers are not optimally assessed on this coronal T1 series, but there is irregularity/scarring at the lateral malleolar attachment region, compatible with remote lateral ankle sprain injury. No acute full-thickness ligament disruption is directly demonstrated on this sequence. | **Low–medium** |\n\n## Structures without definite abnormality on this series\n\n- **Distal tibia/fibula, calcaneus and visualized hindfoot bones:** No acute fracture, marrow-replacing lesion, or gross osteonecrosis evident on T1.\n- **Subtalar joint:** No definite advanced subtalar arthrosis or coalition visible on these images.\n- **Deltoid ligament complex:** Grossly intact on this limited sequence; no definite full-thickness tear identified.\n- **Tendons:** Visualized peroneal, posterior tibial, flexor, extensor, and Achilles tendons appear grossly intact without definite tear on this T1 series.\n- **Joint fluid:** No large tibiotalar or subtalar effusion evident, though fluid-sensitive sequences would be more sensitive.\n- **Soft tissues:** No mass, focal fluid collection, or marked soft-tissue edema is evident on T1."
}