case_images: PMC11035764_01
case_images: Transverse T2W image (A), sagittal STIR image (B), transverse precontrast T1W images (C), transverse T2* image (D), transverse T1W fat-suppressed precontrast image (E) and transverse contrast-enhanced T1W image (F) revealing an extradural mass at the level of the C4 vertebra (arrowheads). Note the characteristic hyperintense signal on image (C) (asterisk) and signal suppression on image (B) but absence of signal suppression on image (E), indicating that the lesion does not contain fat tissue. The absence of signal voids on image (D) reveals that haemorrhage and calcifications are unlikely to be present in the mass.
case_images: fvets-11-1334813-g001.jpg
case_images: PMC11035764_01_fvets-11-1334813-g001.jpg
case_images: fig1
case_images: A solitary, rounded, 10 mm diameter extradural, well-defined mass lesion was observed at the level of the left lamina and pedicle of the C4 vertebra, causing osteolysis (Figure 1). The mass was isointense on T2-weighted (T2W) images (with a central hyperintense cleft) (Figure 1A), markedly hyperintense on T1-weighted (T1W) images (Figure 1C), and with no signal voids on T2* (Figure 1D). Although the mass was suppressed on the short tau inversion recovery (STIR) sequence, there was no suppression on the specific fat-saturation (FAT-SAT) sequences, excluding a lipid-containing lesion (Figures 1B,E).
case_images: 3 CT transverse images bone window (A) and soft tissue window precontrast (B) and post-contrast (C) at the level of C4 vertebra. Note the geographical bone resorption of the left lamina of C4 (arrowheads) and the moderate contrast enhancement of the mass. The mass demonstrated a mean of 58 Hounsfield units.
case_images: fvets-11-1334813-g002.jpg
case_images: PMC11035764_01_fvets-11-1334813-g002.jpg
case_images: fig2
case_images: CdG, France) was administered (2 mL/kg) via a power injector (Injectron 82CT, MedTron AG, Germany) at a rate of 5 mL/s through the cephalic vein. CT demonstrated an osteodestructive, isoattenuating, well-demarcated, homogenously enhancing mass within the left lamina, also affecting the left pedicle and the cranial and caudal articular processes of C4 extending into the vertebral canal and into the left transverse foramen (Figure 2).