PMC4860918_01
Computed tomography scan: Mass in right maxillary antrum, extending to right nasal cavity
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F1
Bone destruction was seen in both the lateral wall of maxillary sinus and inferior wall of the orbit, with infiltration into the anterior ethmoidal sinus [Figure 1].
Gross morphology of the specimen: Multiple pieces of grayish yellow-colored firm tissue
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F2
Tissue was sent in multiple pieces altogether measuring 8 cm x 7 cm x 2.5 cm [Figure 2].
Scanner view of tumor showing the overall variegated appearance (H&E stain, x40)
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F3
Microscopic examination of the sections from different areas showed variegated appearance having intimate admixture of carcinomatous, sarcomatous, primitive neuroectodermal and teratoid elements [Figure 3].
Photomicrograph of sarcomatous component with chondroid differentiation (H&E stain, x200)
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F4
Sarcomatous component was predominantly having chondroid differentiation with foci of endochondral calcification [Figure 4].
Photomicrograph of carcinomatous component (adenocarcinoma) (H&E stain, x200)
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F5
Areas of moderately differentiated adenocarcinoma were noted [Figure 5] along with undifferentiated primitive neuroectodermal elements in solid sheets [Figure 6].
Photomicrograph of primitive neuroectodermal component (H&E stain, x400)
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F6
Areas of moderately differentiated adenocarcinoma were noted [Figure 5] along with undifferentiated primitive neuroectodermal elements in solid sheets [Figure 6].
Photomicrograph of squamous component (H&E stain, x100). Inset: High power view of keratin pearl (H&E stain, x400)
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F7
Immature squamous elements with formation of keratin pearls were seen at places, which were the teratoid element of the tumor [Figure 7].