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July 1994


Arch Otolaryngol Head Neck Surg. 1994;120(7):770-773. doi:10.1001/archotol.1994.01880310072013

Pathologic Quiz Case 1  Miriam I. Redleaf, MD, Robert A. Robinson, MD, PhD, Iowa City, IowaAn 85-Year-Old woman presented with a 4-week history of a nontender "canker sore" that bled occasionally. Its size impaired her chewing. Her medical history was significant for a fracture of her left humerus 4 months before that had failed to heal.On physical examination a submucosal pedunculated mass protruded from the left posterior mandibular alveolar ridge. Orthopedic evaluation identified fractures of the proximal and distal left humerus and of the proximal left radius (Figure 1). A chest roentgenogram identified a right clavicular fracture. Mandibular films were obtained (Figure 2).An incisional biopsy specimen of the intraoral mass was examined with hematoxylin-eosin (Figure 3) and periodic acid–Schiff (Figure 4) stains. Vimentin immunocytochemical stain was positive in tumor cells. On electron microscopy microvilli were seen, and the cytoplasm contained numerous lipid vacuoles.What is your

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