Question
The following microscopic appearance is that of schwannoma—a nerve sheath tumor most commonly involving the cerebellopontine angle. What does the area marked with arrow represent?
| A. |
Myxoid tissue
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| B. |
Antony A pattern
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| C. |
Schwannoma Antoni type B
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| D. |
Antony C pattern Verocay body
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Show Answer
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Correct Answer � C
Explanation
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Ans: C. schwannoma Antoni type B
- Area marked with arrow represents growth pattern.
- Here tumor is less densely cellular & consists of loose meshwork of cells, microcysts and myxoid stroma, Antoni B pattern of growth.
Schwannoma – Histopathology:
- Verocay bodies- “Nuclear-free zones” of processes lie between regions of nuclear palisading.
In Antoni Agrowth pattern:
- Elongated cells with cytoplasmic processes are arranged in fascicles in areas of moderate to high cellularity and scant stromal matrix.
In Antoni B growth pattern:
- Tumor less densely cellular & consists of a loose meshwork of cells, microcysts and myxoid stroma.
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