case_images: PMC11097725_01
case_images: Axial planes of CT scan demonstrating total opacification of both maxillary sinuses and the nasal cavity (A) with extension to the nasopharynx posteriorly (B) and to the right ethmoid (C) and right olfactory cleft (D) superiorly. Left fronto-ethmoidal osteoma was also noted (C).
case_images: 10.1177_20363613241255567-fig1.jpg
case_images: PMC11097725_01_10.1177_20363613241255567-fig1.jpg
case_images: fig1-20363613241255567
case_images: CT scan demonstrated total opacification of the right maxillary sinus and the homolateral anterior ethmoid cells with extension to the nasal cavity, the nasopharynx posteriorly and the homolateral nostril anteriorly (Figure 1). A small left fronto-ethmoidal osteoma of 1 cm was found (Figure 1).
case_images: Coronal planes of contrast-enhanced T1WI MRI showing a convoluted cerebriform aspect of the nasal cavity, the right maxillary sinus, the ethmoid and the nasopharynx.
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case_images: PMC11097725_01_10.1177_20363613241255567-fig2.jpg
case_images: fig2-20363613241255567
case_images: T1 WI was found (Figure 2). The suspected diagnosis was an Inverted papilloma with a wide implantation base on the posterior part of the nasal septum.
case_images: (A) Hematoxylin and eosin (HE) x20 magnification showed a proliferation of invaginated benign glands (yellow arrows). (B) Glands varied in size from small to large with a dilated appearance (HE x40 magnification) (red arrows). (C) The stroma surrounding glands was edematous and contained a mixed inflammatory infiltrate (HE x100 magnification) (green arrows). (D) Glands were lined with ciliated columnar epithelium (HE x400 magnification) (white arrow).
case_images: 10.1177_20363613241255567-fig3.jpg
case_images: PMC11097725_01_10.1177_20363613241255567-fig3.jpg
case_images: fig3-20363613241255567
case_images: The conclusive histology report indicated features consistent with Respiratory Epithelial Adenomatoid Hamartoma (Figure 3).