Mitoses are absent. Papillary projections of such cells into cystic spaces are sometimes present. The cells have cytoplasmic glycogen, and therefore stain with periodic acid-Schiff without diastase digestion. Ultrastructurally, the cells contain numerous glycogen granules, and lack significant microvilli and neurosecretory granules. The differential diagnosis includes other cystic pancreatic processes, including mucinous neoplasms and lymphangiomas.
Treatment is surgical resection, and prognosis is generally excellent.
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