eISSN: 2084-9869
ISSN: 1233-9687
Polish Journal of Pathology
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SCImago Journal & Country Rank
3/2020
vol. 71
 
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abstract:
Original paper

Comprehensive analysis in mucin-producing urothelial-type adenocarcinoma of the prostate: case study with literature review

KyuKyu Moe
1
,
Hung-Chune Maa
1
,
Dee Pei
2
,
Yao-Jen Liang
3
,
Yen-Lin Chen
1

1.
Department of Pathology, Cardinal Tien Hospital, School of Medicine, Fu-Jen Catholic University, New Taipei, Taiwan
2.
Department of Internal Medicine, Fu-Jen Catholic University Hospital, School of Medicine, Fu-Jen Catholic University, New Taipei, Taiwan
3.
Associate Dean of College of Science and Engineering, Director of Graduate Institute of Applied Science and Engineering, Department and Institute of Life-Science, Fu-Jen Catholic University, New Taipei, Taiwan
Pol J Pathol 2020; 71 (3): 244-253
Online publish date: 2020/10/25
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It is critical to distinguish the rare neoplasm of mucin-producing urothelial-type adenocarcinoma of the prostate (MPUAP) from either prostate origin or metastatic adenocarcinoma. This is mainly because they have different tumor staging, clinical behavior and treatment plans. In the current study, we try to fulfill the lack of knowledge in this field.

There were totally 24 MPUAP cases including previous reported 23 cases and adding one new MPUAP case in the current study. We performed IHC and 78 genes panel analysis in two cases of ours.

Most of the cases had urinary obstruction symptoms and normal PSA level. Pathological features showed dissection of the stroma by mucin pools and glands lined by pseudostratified columnar mucinous epithelium with varying degrees of cytological atypia. The IHC results showed positive for CK20, CEA, CDX-2, β-catenin, p53, MUC2 and MUC5AC, negative for PSA, AMACR, GATA3, MUC6, AR and NKX3.1 and variable expression for HMWCK and CK7. Genetic analysis revealed concurrent mutations of FAT1 (c.10001 T>C) and HNF1A in both cases.

The similar morphology features of MPUAP and colorectal adenocarcinoma were seen. Membranous staining pattern of β-catenin and genetic mutation of FAT1 and HNF1A are two distinct features in MPUAP.
keywords:

adenocarcinoma, mucin, FAT1, HNF1A, β-catenin

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