Computed tomography imaging features for amyloid dacryolith in the nasolacrimal excretory system: A case report

Figure 1 A 54-year-old male presented with a chief complaint of a 2-year history of the left lacrimal sac occupation that had grown rapidly for nearly half a year. Physical examination touched a tough nodule in the left lacrimal sac.

Figure 2 Axial and coronal images of non-contrast enhanced computed tomography scan showed the speckle high density in the left lacrimal sac and the dilated nasolacrimal duct. A and B: Axial images of non-contrast enhanced computed tomography scan; C and D: Coronal images of non-contrast enhanced computed tomography scan.

Figure 3 One larger stone removed in the operation.

Figure 4 Orbital pathology (hematoxylin-eosin, × 100). Amorphous pink material and multinucleated giant cell reaction were found in the fibrous tissue.

Figure 5 Photomicrograph (magnification, × 200) demonstrates homogeneous orange material without structure in coarse granular, massive, nodular forms on Congo red staining.