Inverted Papillomas and Benign Nonneoplastic Lesions of the Nasal Cavity

Routine and Dynamic MR Imaging Study of Lobular Capillary Hemangioma of the Nasal Cavity with Comparison to Inverting Papilloma

“…The ulcerative area is composed of neutrophilic infiltrates and irregular dilation of blood vessels, which may undergo secondary nonspecific changes, including stromal edema, inflammation, and a granulation tissue reaction. 4,5 Nasal LCH may develop at any age but is more frequent in the third and fourth decades and in females, 3,4,7,8,11 though our study showed a slight male predominance. LCH usually manifests as recurrent unilateral epistaxis, nasal obstruction, and purulent nasal discharge.…”

“…At nasal endoscopy, the lesion usually appears as a red to purple polypoid mass that easily bleeds. 3,4 In the literature, nasal LCHs occur more frequently in the septum, followed by the lateral wall and the vestibule, 4,5 whereas the lateral wall (71.9%), followed by the vestibule (15.6%) and the septum (12.5%) were the most common sites of origin in our study. According to the literature 14,15 and the present study, nasal LCHs characteristically appear as a lobular and well-defined soft tissue mass.…”

“…[1][2][3][4][5][6][7][8][9][10][11][12][13] LCH is now accepted as the preferred nomenclature because it best represents the true nature of the lesion, which consists of capillaries arranged in lobules and separated by an edematous fibroblastic stroma infiltrated by inflammatory cells. 1,4,12 LCH usually originates from the vascular tissue of the skin, mucosa, muscle, gland, and bone.…”

Advances in recurrence and malignant transformation of sinonasal inverted papillomas

“…In addition, the Korean multicenter study suggested that surgeons should consider combined approaches to reduce recurrence for advanced SIP [Krouse staging system: T3 stage (12); Furuta staging system: T3-A stage (13); Cannady staging system: group B (14)], particularly for novice surgeons (2). Although certain authors propose that SIP involving attachment sites within the maxillary sinus require a endoscopic-external combined technique (1,26), emerging evidence suggests that novel tailored ESS techniques (endoscopic modified medial maxillectomy, and transnasal endoscopic anterior and medial maxillectomy) allow enhanced visualization and preserve important structures, including the inferior turbinate and nasolacrimal duct (27)(28)(29). However, other authors proposed that the endoscopic-external combined approach remains essential for recurrent maxillary SIP (30).…”

“…Sinonasal inverted papilloma (SIP) is a benign tumor which originates from the sinonasal Schneiderian mucosa and accounts for 0.5 to 4% of all nasal and sinus neoplasm (1). Pathologically, SIP epithelium inverts into submucosal stroma, which is distinguished from other types of nasal papilloma.…”