乳腺浸润性微乳头状癌2例报道并文献复习

目的探讨乳腺浸润性微乳头状癌(IMPC)的病理形态学特点、诊断、鉴别诊断和预后。方法观察和分析2例乳腺浸润性微乳头状癌的病理形态学特征、免疫组化染色表达并进行文献复习。结果2例乳腺IMPC无特殊临床症状及体症。肿瘤细胞团呈实性或管状的微乳头状排列,漂浮于海绵状腔隙内。微乳头缺乏纤维血管轴心,每个微乳头细胞团和周边的纤维组织均存在无细胞的间隙样结构。瘤细胞cerbB-2、bcl-2、CgA和EMA( )。结论浸润性微乳头状癌是一种少见的特殊类型浸润性乳腺癌,需与普通型浸润性乳头状癌、黏液癌和转移性乳头状癌等鉴别。     

Bilateral micropapillary serous carcinoma of the ovary: a case report

BACKGROUND: Micropapillary serous carcinoma (MPSC), a recently described entity in the group of serous borderline tumor, needs to be recognized and separated from serous borderline tumor of usual type (SBT) as MPSC has a worse prognosis. CASE REPORT: We report the case of a 21-year-old female with gradually increasing lump abdomen for 6 months. Ultrasonography showed bilateral ovarian enlargement with cysts. Laparotomy revealed both ovaries to be enlarged and right ovary showed capsular breach. With a per-operative diagnosis of bilateral malignant ovarian tumor, total abdominal hysterectomy with bilateral salpingo-oophorectomy was performed. Multiple sections from both ovaries showed non-invasive micropapillary serous carcinoma with right ovary showing surface growth but no definite capsular breach. The final histological diagnosis was bilateral micropapillary serous carcinoma. The patient has been asymptomatic in 10-month follow-up. CONCLUSION: MPSC, classified as serous borderline tumor, needs to be differentiated from APST as well as conventional serous carcinoma. It is diagnosed according to strict criteria laid down. Multiple sections should be studied to exclude invasion. Adequate peritoneal sampling should be performed to look for implants, which is of prognostic significance.     

Invasive Micropapillary Carcinoma of the Breast: MR Imaging Findings

Objective

To analyze the magnetic resonance (MR) imaging findings of invasive micropapillary carcinoma of the breast.

Materials and Methods

MR images were retrospectively evaluated in 14 patients (age range: 37-67, mean age: 49 years) with pathologically confirmed invasive micropapillary carcinoma of the breast. The enhancement type (mass/non-mass), shape, margin, contrast enhancement, and time-intensity curve pattern on the dynamic study were correlated with the histopathologic features. Associated findings, such as edema, nipple change, skin change and enlarged axillary lymph nodes were also studied.

Results

The most common features of the masses were irregular shape (12 of 14 patients, 85.8%) and irregular or spiculated margin (11 of 14 patients, 78.7%). The contrast enhancement was heterogeneous in 11 patients (78.7%), rim enhancement in 2 cases (14.2%), and homogeneous in one patient (7.1%). The predominant kinetic pattern was rapid increase (14 of 14, 100%) in the initial phase and washout (11 of 14, 78.7%) in the delayed phase. Associated non-mass like enhancement was shown in 4 patients, representing ductal carcinoma in situ. MR imaging helped detect additional sites of cancer other than the index lesion in 3 patients (21.4%). Enlarged axillary lymphadenopathy was identified in 7 of the 14 patients (50%).

Conclusion

Invasive micropapillary carcinoma appears as a mass with an irregular shape, irregular or spiculated margin and heterogeneous enhancement on MR imaging. Though these findings are not specific and are also observed with other breast malignancies, invasive micropapillary carcinoma frequently showed multiple lesions, accompanying non-mass enhancement and axillary lymph node enlargement.     

Invasive colorectal micropapillary carcinoma: an aggressive variant of adenocarcinoma

Micropapillary carcinoma (MC) has been well described in other organs, including breast, urinary bladder, lung, ovary, and salivary gland, but has not been described in the large intestine. We compared the clinicopathologic and immunohistochemical findings of MC with those of conventional adenocarcinoma in the large intestine. Fifty-five cases of adenocarcinoma with an MC component were identified among 585 consecutive cases of colorectal cancer at the Asan Medical Center between January 2003 and June 2004 and were compared with 119 cases of conventional adenocarcinoma of colorectum without an MC component. Arrayed tissue blocks were constructed and immunostained for cytokeratin 7 and 20 and CDX2. We also compared the results of MLH-1, MSH-2, p53, and carcinoembryonic antigen immunostainings between the 2 groups. The grade of both MC and conventional adenocarcinoma was mostly moderately differentiated. The proportion of MC ranged from 5% to 80%. The presence but not extent of MC in the primary tumors was associated with more frequent lymphovascular invasion and lymph node (LN) metastases, a greater mean number of positive LNs, and a higher tumor stage with more frequent distant metastases, compared with conventional adenocarcinoma (P < .05). Cytokeratin 7 staining was occasionally observed in both MC (9.1%, 5/55 cases) and conventional adenocarcinoma (13.4%, 16/119 cases). Although MLH-1 and CDX2 expression tended to be lower in conventional adenocarcinoma, none of the immunohistochemical results was significantly different between 2 groups. Recognition of MC component is important as MC appeared to be an aggressive variant of colonic adenocarcinoma and presented at a higher stage, with frequent lymphovascular invasion, LN metastasis, and distant metastasis, compared with conventional adenocarcinoma. The proportion of MC component did not impact the prognosis, and the immunoprofiles of MC were not significantly different from those of conventional adenocarcinoma.     

Micropapillary component of urothelial carcinoma detected in transurethral resection of bladder tumor (TUR-BT) tissues: a case report

A case of urothelial carcinoma (UC) containing a micropapillary carcinoma (MPC) component in the urinary bladder of an 83-year-old man is reported. The MPC component of UC has been reported to be a variant featuring poor prognosis and rapid progression. In the present case, a characteristic MPC component with micropapillary growth, in association with a fine meshwork-like stroma, was observed in less than 10% of fragmented cancer tissues of UC, G3, obtained by transurethral resection of a bladder tumor (TUR-BT). Lymphatic invasion was also detected. UC cancer cells had invaded the prostatic glands and replaced the original epithelial cells. The unique "insideout" feature of the MPC component was immunohistochemically obvious on staining with antibody to epithelial membrane antigen (EMA). On immunohistochemical study, cancer cells of both UC and MPC components were positive for pancytokeratin AE1/AE3 and cytokeratins 7 and 20. Carcinoembryonic antigen (CEA) and CAM5.2 were only focally positive in UC cells. MIB-1(Ki-67) labeling index was high, at 80%-90%, in cancer cells of UC. This was a case of UC, G3 with invasion to the muscularis propria layer of the urinary bladder and also to the prostate. MPC and MPC components in cancers should be recognized as a marker of poor prognosis, even when detected in less than 10% of UC within TUR-BT tissues, as in the present case.     

乳腺浸润性微乳头状癌临床病理学观察

目的:探讨乳腺浸润性微乳头状癌(IMPC)的病理形态学特点、诊断、鉴别诊断和预后.方法:采用光镜和免疫组化SP法对3例IMPC进行观察并结合文献分析.结果:3例乳腺IMPC与浸润性导管癌相比无特殊的临床症状、体征及大体检查.光镜下特征性表现为肿瘤细胞呈桑椹状、微乳头状或小腺管样排列,癌巢与周围间质形成明显的空隙,微乳头缺乏纤维血管轴心,每个微乳头细胞团和周边的纤维组织均存在无细胞的间隙样结构;瘤细胞CerbB-2、CgA和EMA( ).结论:浸润性微乳头状癌是一种少见类型的浸润性乳腺癌,具有淋巴管侵袭性强、淋巴结转移率高、预后差的生物学行为.     

Variants of Bladder Cancer: The Pathologist's Point of View

Pathologic evaluation of bladder cancer typically reveals great tumor heterogeneity and, therefore, the common observation of urothelial carcinoma exhibiting a wide variety of histopathologic patterns is not surprising. Some of these patterns are so distinctive that they have been recognized as specific variants of urothelial carcinoma. Classifications have recently been revised in the 2016 World Health Organization Classification of Tumors of the Urinary System and Male Genital Organs. The current World Health Organization classifications clarify terminological issues and provide better definition criteria, but also incorporates some new entities. Many of these variants have important prognostic or therapeutic implications worth knowing by the urologist and oncologist, but also represent diagnostic challenges in daily practice of pathology. This review will discuss the features of pathologic variants of bladder cancer in the context of our current clinical practice.     

Micropapillary Urothelial Carcinoma of the Bladder: A Systematic Review and Meta-analysis of Disease Characteristics and Treatment Outcomes

Context

The optimal treatment of urothelial bladder cancer (UBC) with micropapillary (MP) variant histology is not clear.