Lymph node — benign vs suspicious
| Sign | Benign | Suspicious/malignant |
|---|---|---|
| Shape (short/long) | Oval (< 0.5) | Round (≥ 0.5) |
| Fatty hilum | Present | Absent |
| Cortex | Thin and uniform | Thickened/eccentric |
| Vascularity | Hilar | Peripheral/chaotic |
Combine signs; microcalcifications and cystic necrosis raise suspicion (e.g., papillary carcinoma metastasis).
Source: Radiology Key / PubMed (critérios sonográficos)