PMC10060820_01
Lateral (A) and ventrodorsal (B) radiographs of a nine-month-old female German Shepherd was presented as an emergency for evaluation of a progressive, right asymmetrical, non-ambulatory tetraparesis and cervical pain. The metallic foreign bodies are very evident.
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F1
Radiographs revealed two metallic foreign bodies lodged at the cervicomedullary junction (Figure 1).
Transverse slices from computed tomography imaging at the region of the cervicomedullary junction showing metallic foreign bodies that are penetrating the dura at the level of the caudal brainstem (cervicomedullary junction).
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F2
The CT delineated the foreign bodies were at least partially intradural and located on the right side of the cervicomedullary junction (Figure 2).
Dorsal (A) and cranial (B) view of the 3D resin print of the caudal portion of the occipital bone and the C1 and C2 vertebrae. The blue arrows point to the metallic foreign bodies.
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F3
This was valuable in planning the procedure and locating the exact position of the two metallic foreign bodies (Figure 3).
(A) A graphic representation of the area where the ventral craniectomy was performed (asterisk). (B) An illustration of showing many of the important anatomical structures encountered in this modified approach.
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F4
An illustration of the pertinent anatomical structures associated with this approach is shown in Figure 4. The area opened with the ventral craniectomy is shown in Figure 4.
The blue arrow points to the 2 metallic objects retrieved in surgery that penetrated the dura and were partially lodged in the parenchyma of the brainstem. Each measured ~ 20 mm (0.75 inches) in length.
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F5
Examination of the metallic objects revealed they were two-halves of the shaft portion of a 40 mm (1.5 inch) hypodermic needle (Figure 5).