case_images: PMC9744598_01
case_images: Sagittal T1-weighted preoperative MRI with contrast showing an anterior intradural extramedullary mass, measuring 1.6 x 0.9 x 2.8 cm (blue arrow). The mass is centered at C5 and spans from C4-6 with what appears to be a dural tail. The mass shows significant compression of the spinal cord.
case_images: CRIID2022-9773058.001.jpg
case_images: PMC9744598_01_CRIID2022-9773058.001.jpg
case_images: fig1
case_images: A dural tail, centered at the level of the fifth cervical vertebra, was present, with enhancement and cord compression (Figure 1).
case_images: Longitudinal section revealing degenerating Onchocerca lupi nematode encased in inflamed, dense fibrous tissue. Lillie-Twort Gram stain, original magnification x25.
case_images: CRIID2022-9773058.002.jpg
case_images: PMC9744598_01_CRIID2022-9773058.002.jpg
case_images: fig2
case_images: Within a few fragments of tissue were remnants of foreign material compatible with the cuticular wall of a degenerating nematode (Figure 2), for which morphological details could be emphasized using a trichrome stain.
case_images: Trichrome-stained sections of O. lupi revealing relevant morphological features ((a) 200x magnification and (b) 400x magnification). Arrows indicate external cuticular ridges, and arrowheads indicate internal striae.
case_images: CRIID2022-9773058.003.jpg
case_images: PMC9744598_01_CRIID2022-9773058.003.jpg
case_images: fig3
case_images: Longitudinal sections of the cuticular wall revealed two inner striae per ridge, morphologically compatible with O. lupi, likely damaged by host immune response (Figure 3).