Endoscopy-assisted medial canthus incision for olfactory neuroblastoma: a case report

Abstract

Sinonasal malignant tumors are a group of uncommon malignancies that account for less than 1% of all tumors. These tumors often involve the maxillary sinus and nasal cavity, with less cumulative incidence in the ethmoidal sinus, sphenoidal sinus, and frontal sinus. The lack of consensus on the management of sinonasal malignancies is due to their rarity, diagnostic challenges, and the heterogeneity of treatments. In this paper, we present a case of endoscopic-assisted medial canthus incision combined with radiotherapy in the treatment of sinonasal malignant tumors, with the aim of providing valuable insights to clinicians on the management of these tumors.

Keywords: Endoscopy; Olfactory neuroblastoma; Sinonasal malignant tumors.

Fig. 1

a: CT: The presence of erosion in the left sinus wall, the cricoid plate, and the left intraorbital wall. b: MRI: The mean signal of the mass on the t2-weighted sequence was high signal, with unclear boundaries and large invasion range

Fig. 2

Pathological examination (H&E. 40×): Olfactory neuroblastoma which is high nucleo-cytoplasmic ratio, deep round nuclei, inconspicuous nucleoli, scarce cytoplasm, and abundant intercellular vascularized fibromyxoid stroma