Table 1.
The demographic and clinical characteristics of 31 angiomatous nasal polyps.
Table 2.
Number and Percentage of Patients Having a Particular Nasal Endoscopy Sign and the Average Lund-Kennedy (LK) Score (and Ranges) for Each Sign.
Table 3.
CT and average Lund-MacKay (LM) Score.
Table 4.
CT features of 31 angiomatous nasal polyps.
Figure 1.
Computed tomography (CT) of a recurrent angiomatous polyp (ANP) in the left maxillary sinus 10 years after ANP removal surgery.
CT showed an irregular, soft-tissue mass in the left maxillary sinus. The density was heterogeneous, and the CT value was approximately 45 HU. The medial maxillary sinus wall was completely destroyed (arrow). The mass involved the left nasal cavity and the left ethmoid sinus. A: noncontrast coronal CT in bone window; B: noncontrast coronal CT in soft-tissue window.
Figure 2.
CT of an ANP in the left maxillary sinus involving the ipsilateral ethmoid sinus.
2A: Noncontrast coronal CT in soft-tissue window showed that a high-density mass filled the total left maxillary sinus. The density of the mass was homogeneous. The left maxillary sinus was expansile, and the medial maxillary sinus wall was partially destroyed (arrow). The mass involved the ipsilateral ethmoid sinus. 2B: Contrast-enhanced CT: The mass was non-enhanced.
Figure 3.
CT of an ANP in the left maxillary sinus involving the ipsilateral orbit.
A :Noncontrast coronal CT in soft-tissue e window showed that a high-density mass filled the total left maxillary sinus. 3B: Noncontrast coronal CT in soft-tissue e window showed that the lesion was involved in the left orbitand the eyeball shifted laterally (arrow).
Figure 4.
CT of an ANP confined within the right nasal cavity.
Noncontrast coronal CT in bone window(A) and in soft-tissue e window(B) showed a soft-tissue mass limited within the right nasal cavity. The edge was irregular, and the nasal septum was compressed and deformed (arrow). The CT value was 26 HU. The walls of the right nasal cavity were intact. The maxillary and ethmoid sinuses were not involved. 4C: Contrast-enhanced CT showed the lesion was non-enhanced.
Figure 5.
Grossly, the tumors were purple, necrotic masses.
Figure 6.
A: Light microscopy showed the tumor covered with pseudostratified, ciliated, columnar epithelium or stratified squamous epithelium with edematous stroma, and many infiltrating inflammatory cells (hematoxylin and eosin staining; original magnification, ×100). B: Proliferation of thin-walled vascular channels. Separated blood vessels exhibited concentric accumulation of amorphous material (hematoxylin and eosin staining; original magnification, ×100).
Figure 7.
Pathological finding of edematous stroma and thrombus formation (hematoxylin and eosin staining; original magnification, ×100).
Figure 8.
Pathological findings of an earlier organized thrombus (8A: hematoxylin and eosin staining; original magnification, ×400) and organized thrombus (8B: hematoxylin and eosin staining; original magnification, ×200).
Table 5.
Clinical and CT imaging features in the angiomtous nasal polyps and diverse entities.