{
 "serie": "s2_AX_T1_memp",
 "n_imgs": 24,
 "s": 66.3,
 "respuesta": "## Abnormal findings identified on the provided axial T1 ankle series\n\n### 1. Medial talar dome osteochondral/subchondral abnormality  \n- **Location:** Medial to posteromedial talar dome/shoulder.  \n- **Description:** Focal subchondral low T1 signal with mild overlying articular surface irregularity/flattening, suspicious for a chronic osteochondral lesion of the talar dome. Cartilage is not optimally assessed on this T1 sequence, but the subchondral abnormality is visible.  \n- **Confidence:** **Medium**\n\n### 2. Chronic lateral ligament injury, greatest involving the ATFL  \n- **Location:** Anterolateral ankle/lateral gutter, expected course of the anterior talofibular ligament from distal fibula to talar neck.  \n- **Description:** The ATFL is not well seen as a normal taut low-signal band and appears attenuated/irregular, compatible with chronic sprain/partial tear or chronic tear/scarring. This fits the remote inversion sprain history.  \n- **Confidence:** **Medium**\n\n### 3. Mild anterolateral gutter / sinus tarsi scarring or fibrotic change  \n- **Location:** Anterolateral ankle and lateral hindfoot/sinus tarsi region.  \n- **Description:** Mildly heterogeneous low-signal soft tissue in the anterolateral gutter/sinus tarsi region, likely chronic post-sprain scar tissue. No discrete mass is evident on this sequence.  \n- **Confidence:** **Low to medium**\n\n### 4. Small tibiotalar joint fluid  \n- **Location:** Tibiotalar joint recesses.  \n- **Description:** Small amount of low T1 joint fluid; no large effusion.  \n- **Confidence:** **Low**\n\n## Structures grossly normal on this axial T1 series\n\n- **Bones:** No acute fracture, marrow-replacing lesion, or diffuse marrow abnormality seen. No obvious avascular necrosis.  \n- **Distal tibiofibular syndesmosis:** Grossly preserved alignment; no definite syndesmotic widening on these slices.  \n- **Peroneal tendons:** Grossly intact and normally located without evident dislocation or definite split tear on this sequence.  \n- **Posteromedial tendons:** Posterior tibial, flexor digitorum longus, and flexor hallucis longus tendons appear grossly intact.  \n- **Anterior extensor tendons:** Grossly intact.  \n- **Achilles tendon:** Grossly intact.  \n- **Deltoid ligament complex:** No definite tear identified on the provided axial T1 images.  \n- **Subtalar joint:** No large effusion or obvious advanced arthropathy visible on this series.  \n\nOverall, the most relevant abnormalities are a suspected chronic osteochondral lesion of the medial talar dome and chronic anterolateral ligamentous/post-sprain scarring, especially involving the ATFL."
}