Table 2 MRI findings of extraosseous osteosarcoma
From: Imaging diagnosis and differential diagnosis of extraskeletal osteosarcoma
Case | T1WI | T2WI | T1 enhancement | Cystic degeneration/necrosis | Fiber dividers | Envelope | Peripheral invasion |
|---|---|---|---|---|---|---|---|
Case1 | isosignal | Wait/high signal | Uneven noticeable intensification | Yes | None | Yes | Invasion of the common peroneal nerve |
Case2 | Low/equal/high signal | Low/equal/high signal | Uneven noticeable intensification | Yes | Yes | Yes | None |
Case3 | Low/high signal | Low/high signal | Uneven noticeable intensification | Yes | Yes | Yes | / |
Case4 | isosignal | High signal | Uneven noticeable intensification | Yes | Yes | None | / |
Case5 | / | / | / | Yes | None | / | Invading the stomach wall |
Case6 | Wait/low signal | Low/equal/high signal | Sustained significant reinforcement | Yes | None | None | Invasion of bladder and rectum |
Case7 | Wait/low/high signal | Low/high signal | Sustained significant reinforcement | Yes | None | Yes | Intestinal invasion |
Case8 | / | / | / | Yes | / | Yes | None |
Case9 | / | / | / | Yes | None | Yes | None |
Case10 | Equal/low signal | Low/equal/high signal | / | Yes | None | Yes | None |
Case11 | / | / | / | Yes | None | / | / |