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Solid Pseudopapillary Neoplasm of the Pancreas: A Rare Entity With Unique Features.

胰腺实性假乳头状肿瘤:具有独特特征的罕见实体。

Abstract

Solid pseudopapillary neoplasm of the pancreas is a rare entity with low malignant potential and excellent overall prognosis. It has nonspecific clinical presentations such as abdominal pain and nausea, with vague radiologic features. Histologic features of this neoplasm are usually specific. The tumor shows minimally cohesive, uniform, monotonous cells lining delicate capillary-sized blood vessels, described as pseudopapillary architecture. Other features including hyaline globules, cytoplasmic vacuoles, and nuclear grooving are frequently present. Use of a select panel of immunostains always helps pathologists to differentiate this tumor from other circumscribed tumors of the pancreas. Recently, β-catenin, CD10, and E-cadherin have been shown to be very important in the diagnosis of solid pseudopapillary neoplasm. Nuclear staining of tumor cells by β-catenin and membranous presentation of CD10 is seen in almost 100% of cases. Tumor cells can be partially positive for synaptophysin and chromogranin. This tumor has a low malignant potential, and definite treatment is surgical resection.

摘要

胰腺实性假乳头状肿瘤:具有独特特征的罕见实体。

胰腺性假乳头状肿瘤是具有低度恶性潜能预后良好的罕见肿瘤。它的临床表现具有非特异性,如腹痛和恶心,放射学特征也不明显。这种肿瘤的组织学特征通常是特异性的。肿瘤表现为纤细的微小血管周边、均匀一致、粘附性差的细胞被描述为假乳头结构常见其他特征,如玻变小体、胞质空泡和核。一组免疫组化染色有助于将这种肿瘤与胰腺的其他肿瘤区分开来。最近,已证实β-环蛋白、CD10和E-钙粘蛋白在性假乳头状肿瘤的诊断中非常重要。几乎100%的细胞核表达β-环蛋白、细胞膜表达CD10肿瘤细胞对于神经内分泌标记物突触素(Syn)和嗜铬素(CgA)可能是部分阳性。该肿瘤具有低度恶性潜能,治疗方案为手术切除。

 

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