An Inflammatory Pseudotumor Arising from Pterygopalatine Fossa with Invasion to the Maxillary Sinus and Orbital Cavity

<div>(a) Hematoxylin-eosin (HE) staining. Marked lymphocytic infiltration was found in the lesion. Infiltrating lymphocytes were small in size. (b) Immunohistochemical staining. Infiltrating lymphocytes consisted of CD3-positive T-cells and CD79a-positive B-cells. Infiltrating lymphocytes revealed low Ki-67 and P53 positivity. CD34 expression was limited in the vascular endothelial cells.</div>

Case Reports in Otolaryngology

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Figure 2

Figure 2: An Inflammatory Pseudotumor Arising from Pterygopalatine Fossa with Invasion to the Maxillary Sinus and Orbital Cavity 