PMC9307390_01
Gross photograph of low-grade appendiceal mucinous neoplasm. (a) It shows formalin-fixed right hemicolectomy tissue consisting of segments of terminal ileum, ascending colon and firm cystic sclero-hyalinized appendiceal mucinous neoplasm. (b) The cut section of the appendiceal neoplasm hand-held to display the content of gelatinous mucin and the remarkably thick sclerotic wall.
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fig1
The cyst contained gelatinous mucin, and its wall measured 1 cm in thickness (Figure 1).
Photomicrograph of low-grade appendiceal mucinous neoplasm. (a) It shows a single layer of neoplastic mucin secreting epithelium resting on a fibrotic wall. (b) It shows pushing invasion into the fibrotic wall and luminal mucin. H&E. x20 objective.
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fig2
The layer of neoplastic epithelium showed outpouchings into the fibrous wall, but no areas of destructive invasion were seen Figure 2.