{
 "serie": "s201_STIR_SAG",
 "n_imgs": 18,
 "s": 64.9,
 "respuesta": "**Limited note:** Assessment is based only on the provided sagittal STIR images; ligament/cartilage detail is limited without the full multiplanar MRI set.\n\n## Abnormal findings\n\n| Structure/region | Finding | Confidence |\n|---|---|---|\n| **Talus — talar neck/head region, inferior/central aspect near the sinus tarsi/middle subtalar region** | Focal marrow STIR hyperintensity/edema. No displaced fracture line or collapse is evident on these images. This could reflect bone contusion/stress reaction or reactive subchondral edema. | **High** for marrow edema; **low–medium** for exact cause |\n| **Sinus tarsi / lateral subtalar region** | Increased fluid/edema with partial loss of the normal fat signal in the sinus tarsi. This may reflect sinus tarsi inflammation and/or sprain of the cervical/interosseous talocalcaneal ligament complex. | **High** for edema/fluid; **medium** for ligament sprain interpretation |\n| **Lateral ankle soft tissues / lateral ligament region** | Mild peri-ligamentous soft tissue edema around the lateral ankle/sinus tarsi region. The ATFL/CFL are not well assessed on sagittal STIR alone; no definite complete ligament discontinuity is visible. | **Medium** |\n| **Tibiotalar and subtalar joints** | Small joint effusions, most apparent in the anterior/posterior tibiotalar recesses and subtalar recesses. | **High** |\n| **Peroneal tendon region** | Possible mild fluid/edema around the peroneal tendons laterally, suggesting mild tenosynovitis; no tendon rupture is visible on these images. | **Low–medium** |\n| **Superficial soft tissues** | Mild diffuse subcutaneous/periarticular edema about the ankle/hindfoot, greater laterally and along the dorsal/plantar soft tissues. | **Medium** |\n\n## Structures without definite abnormality on these images\n\n- **Achilles tendon:** Intact, no definite tear.  \n- **Plantar fascia:** No definite tear or marked plantar fasciitis visible.  \n- **Medial flexor and anterior extensor tendons:** No gross tear identified on this sagittal STIR series.  \n- **Talar dome cartilage/subchondral bone:** No definite osteochondral lesion of the talar dome is seen on the provided images.  \n- **Calcaneus, distal tibia/fibula, midfoot bones:** No definite acute displaced fracture identified on this sequence."
}