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1.
Virchows Arch ; 479(5): 1051-1053, 2021 Nov.
Article in English | MEDLINE | ID: mdl-33782741

ABSTRACT

A 63-year-old woman presented with a clinically malignant mass. Core biopsy showed features resembling endometriosis. The glands were GATA3 and oestrogen receptor positive consistent with mammary origin and had no myoepithelial layer. The excision also showed a fibroepithelial component with stromal overgrowth, frequent mitoses and invasive margin consistent with a malignant phyllodes tumour. KMT2D and SETD2 mutations were present in both the conventional phyllodes tumour and endometriosis-like areas and are also described in endometriosis raising interesting questions about these lesions. This unusual pattern is a potential diagnostic pitfall, so it is helpful to be aware of it.


Subject(s)
Breast Neoplasms/pathology , Endometriosis/pathology , Phyllodes Tumor/pathology , Biomarkers, Tumor/analysis , Biomarkers, Tumor/genetics , Biopsy, Large-Core Needle , Breast Neoplasms/chemistry , Breast Neoplasms/genetics , Breast Neoplasms/surgery , DNA Mutational Analysis , DNA-Binding Proteins/genetics , Diagnosis, Differential , Endometriosis/genetics , Endometriosis/metabolism , Female , GATA3 Transcription Factor/analysis , Histone-Lysine N-Methyltransferase/genetics , Humans , Immunohistochemistry , Mastectomy , Middle Aged , Mutation , Neoplasm Proteins/genetics , Phyllodes Tumor/chemistry , Phyllodes Tumor/genetics , Phyllodes Tumor/surgery , Predictive Value of Tests , Radiotherapy, Adjuvant , Receptors, Estrogen/analysis , Treatment Outcome
2.
Am J Surg Pathol ; 42(6): 836-839, 2018 06.
Article in English | MEDLINE | ID: mdl-29543676

ABSTRACT

Phyllodes tumor of the prostate is a rare mesenchymal tumor conventionally regarded as a stromal tumor of undetermined malignant potential. While the initial presentation is that of urinary obstruction and/or hematuria, the subsequent clinical behavior is thought to be a function of stromal cellularity and cytologic changes of malignancy. Of histologic interest, the epithelial component of this tumor varies, including intestinal metaplasia, as seen in the present case.


Subject(s)
Epithelial Cells/pathology , Phyllodes Tumor/pathology , Prostatic Neoplasms/pathology , Aged , Biopsy , Epithelial Cells/chemistry , GATA3 Transcription Factor/analysis , Humans , Immunohistochemistry , Kallikreins/analysis , Male , Metaplasia , Neoplasm Grading , Phyllodes Tumor/chemistry , Phyllodes Tumor/surgery , Prostate-Specific Antigen/analysis , Prostatic Neoplasms/chemistry , Prostatic Neoplasms/surgery
3.
Semin Diagn Pathol ; 34(5): 438-452, 2017 Sep.
Article in English | MEDLINE | ID: mdl-28688536

ABSTRACT

Fibroepithelial lesions of the breast comprise a morphologically and biologically heterogeneous group of biphasic tumors with epithelial and stromal components that demonstrate widely variable clinical behavior. Fibroadenomas are common benign tumors with a number of histologic variants, most of which pose no diagnostic challenge. Cellular and juvenile fibroadenomas can have overlapping features with phyllodes tumors and should be recognized. Phyllodes tumors constitute a spectrum of lesions with varying clinical behavior and are graded as benign, borderline or malignant based on a set of histologic features according to recommendations by the World Health Organization (WHO). Recent developments have significantly expanded our understanding of the pathogenesis of fibroepithelial lesions, highlighting fibroadenomas as true neoplasms and underscoring a commonality with phyllodes tumors in the form of recurrent MED12 exon 2 mutations. In addition, sequencing studies have elucidated pathways associated with phyllodes tumor progression. Accurate diagnosis and grading of phyllodes tumors are important for patient management and prognosis, as grade broadly correlates with increasing local recurrence risk, and essentially only malignant tumors metastasize. However, classification of fibroepithelial lesions in many cases remains challenging on both core biopsy and excision specimens. A commonly encountered problem at the benign end of the spectrum is the distinction of benign phyllodes tumor from cellular fibroadenoma, which is largely due to the subjective nature of histologic features used in diagnosis and histologic overlap between lesions. Grading is further complicated by the requirement to integrate multiple subjective and ill-defined parameters. On the opposite end of the histologic spectrum, malignant phyllodes tumors must be distinguished from more common metaplastic carcinomas and from primary or metastatic sarcomas, which can be especially difficult in core biopsies. Immunohistochemistry can be useful in the differential diagnosis but should be interpreted with attention to caveats. This review provides an overview and update on the spectrum of fibroepithelial lesions, with special emphasis on common problems and practical issues in diagnosis.


Subject(s)
Breast Neoplasms/pathology , Neoplasms, Fibroepithelial/pathology , Phyllodes Tumor/pathology , World Health Organization , Biomarkers, Tumor/analysis , Biomarkers, Tumor/genetics , Biopsy , Breast Neoplasms/chemistry , Breast Neoplasms/genetics , Diagnosis, Differential , Female , Fibroadenoma/chemistry , Fibroadenoma/genetics , Fibroadenoma/pathology , Genetic Predisposition to Disease , Humans , Immunohistochemistry , Molecular Diagnostic Techniques , Neoplasm Grading , Neoplasms, Fibroepithelial/chemistry , Neoplasms, Fibroepithelial/genetics , Phenotype , Phyllodes Tumor/chemistry , Phyllodes Tumor/genetics , Predictive Value of Tests
4.
Hum Pathol ; 57: 176-181, 2016 11.
Article in English | MEDLINE | ID: mdl-27498063

ABSTRACT

Phyllodes tumors (PTs) of the breast constitute an uncommon group of fibroepithelial neoplasms that are classified into benign, borderline, and malignant categories based on a constellation of histologic characteristics including cytologic atypia, mitotic count, degree of stromal cellularity, stromal overgrowth, and microscopic margins. Accurately and reproducibly differentiating these tumors is a long-standing diagnostic challenge. In addition, the distinction between benign PT from cellular fibroadenoma (FA) is especially difficult because of overlapping microscopic features. We have previously shown differential expression of various collagens, including collagen type III α1 (Col3A) in breast carcinomas. In this study, we evaluated clinicopathological characteristics of 95 cases of fibroepithelial lesions including 56 PTs and 39 FAs (25 cellular FA, 14 typical FA) and correlated them with the immunohistochemical staining pattern for Col3A. We found that stromal Col3A expression was significantly increased in PTs when compared with FAs (P < .0001). Among the PT groups, there was significantly increased expression from benign tumors through borderline to malignant tumors. High Col3A expression was associated with PT type, irregular margin status, and high mitotic activity. A distinct periductal cuffing pattern of Col3A staining was unique to PTs and absent in FAs. These findings suggest that Col3A can be a potential adjunct marker for both differentiating FA from PT and assessing malignant potential in PTs.


Subject(s)
Biomarkers, Tumor/analysis , Breast Neoplasms/chemistry , Collagen Type III/analysis , Fibroadenoma/chemistry , Immunohistochemistry , Phyllodes Tumor/chemistry , Adult , Breast Neoplasms/pathology , Diagnosis, Differential , Female , Fibroadenoma/pathology , Humans , Middle Aged , Phyllodes Tumor/pathology , Predictive Value of Tests , Prognosis
5.
Hum Pathol ; 55: 30-8, 2016 09.
Article in English | MEDLINE | ID: mdl-27137988

ABSTRACT

The aim of this study was to elucidate the clinicopathological and prognostic significance of the expressions of insulin-like growth factor II mRNA-binding protein-3 (IMP3) and epidermal growth factor receptor (EGFR) in phyllodes tumors (PTs). Immunohistochemical staining for IMP3 and EGFR was performed in 130 cases of primary PTs (83 benign, 28 borderline, 19 malignant), 34 recurrent/metastatic PTs, and 26 fibroadenomas (FAs). Among the primary tumors, a high expression of IMP3 was significantly more frequently present in malignant PTs (17/19, 89%) than in the FAs (0/26, 0%), benign PTs (0/83, 0%) and borderline PTs (3/28, 11%). The recurrent and metastatic lesions of malignant PTs also showed high IMP3 expression (3/5 [60%] and 6/6 [100%], respectively). Most malignant PTs showed strong IMP3 expression at the interductal area or more diffusely, whereas weak and focal (low) expression of IMP3 was limited to the periductal area in FAs and benign PTs. EGFR overexpression was significantly correlated with tumor grade and high IMP3 expression. Overexpressions of IMP3 and EGFR were significantly associated with shorter periods of metastasis-free and disease-free survival. The results suggest that high expressions of IMP3 and EGFR with a characteristic staining pattern may be helpful for both identifying malignant PT and predicting the prognosis of these tumors.


Subject(s)
Biomarkers, Tumor/analysis , Breast Neoplasms/chemistry , Phyllodes Tumor/chemistry , RNA-Binding Proteins/analysis , Adolescent , Adult , Aged , Biopsy , Breast Neoplasms/pathology , Breast Neoplasms/therapy , Case-Control Studies , Child , Disease-Free Survival , ErbB Receptors/analysis , Female , Humans , Immunohistochemistry , Kaplan-Meier Estimate , Middle Aged , Neoplasm Grading , Neoplasm Recurrence, Local , Phyllodes Tumor/secondary , Phyllodes Tumor/therapy , Predictive Value of Tests , Proportional Hazards Models , Risk Factors , Time Factors , Up-Regulation , Young Adult
7.
Hum Pathol ; 49: 90-8, 2016 Mar.
Article in English | MEDLINE | ID: mdl-26826415

ABSTRACT

Classification of mammary fibroepithelial tumors (FETs) relies on assessment of mitotic activity, among other histopathologic parameters. Routine hematoxylin and eosin (H&E) mitotic counts can be subjective and time consuming. Difficulty may arise in identifying "true" mitoses for a variety of reasons. Phosphorylation of histone H3 protein (PHH3) is correlated with mitotic chromatin condensation. The utility of PHH3 immunohistochemical staining to identify mitoses has been demonstrated in multiple organ systems. In this study, we examined the utility of PHH3 in assessing mitotic activity in FETs and compared PHH3- with H&E-determined mitotic counts. PHH3-stained mitoses were readily identifiable at ×10 magnification and allowed for rapid identification of mitotic "hot spots." Median mitotic counts/10 high-power fields for fibroadenoma, benign phyllodes tumor, borderline phyllodes tumor (BlnPT), and malignant phyllodes tumor (MPT) were 0, 0.5, 4.25, and 9, respectively on H&E, and 0, 0.75, 4.5, and 8, respectively for PHH3. Among all FETs, there was a strong positive correlation between H&E- and PHH3-determined mitotic counts (r=0.91, P<.001). Using PHH3, 2 cases would be reclassified, both from BlnPT to MPT. PHH3-determined counts correlated with H&E-determined counts in FETs. Using PHH3, a small number of cases were reclassified from BlnPT to MPT, for which treatment is similar. Although H&E-determined counts remain the criterion standard for assessing mitotic activity in FETs, PHH3 may be a useful adjunctive tool in some cases and is helpful in identifying mitotic hot spots.


Subject(s)
Breast Neoplasms/chemistry , Breast Neoplasms/pathology , Histones/analysis , Mitosis , Neoplasms, Fibroepithelial/chemistry , Neoplasms, Fibroepithelial/pathology , Phyllodes Tumor/chemistry , Phyllodes Tumor/pathology , Adolescent , Adult , Aged , Aged, 80 and over , Biomarkers, Tumor/analysis , Biopsy , Female , Humans , Immunohistochemistry , Middle Aged , Mitotic Index , Neoplasm Grading , Phosphorylation , Predictive Value of Tests , Reproducibility of Results , Young Adult
9.
J Clin Pathol ; 68(10): 808-11, 2015 Oct.
Article in English | MEDLINE | ID: mdl-26056158

ABSTRACT

BACKGROUND: Mammary phyllodes tumours (PT) are rare biphasic neoplasms but have important clinical significance. Both epithelial and stromal components participate in PT development. Despite a number of studies on stromal c-kit in PT, little is known about the role of its epithelial expression. OBJECTIVE: To further evaluate the stromal and epithelial expression of c-kit in a cohort of patients with PT. METHOD AND RESULTS: Expression of c-kit in both epithelial and stromal components was examined and correlated with histological features in PT. Stromal c-kit expression was associated positively with stromal cellularity (median expression=10.0, 30.0 and 50.0 from mild to severe cellularity; p=0.019). Conversely, a significant negative trend between epithelial c-kit expression with stromal pleomorphism (median expression=55.0, 30.0 and 2.5 from mild to severe pleomorphism; p=0.043) and mitosis (median expression=70.0 and 20.0 for low and high mitosis respectively; p=0.003); and a trend of negative correlation with increased PT grade was found. Despite these reverse associations, epithelial and stromal c-kit expressions were positively correlated with each other. Notably, the correlation of stromal c-kit expression with malignant histological features appeared to be stronger in cases with low epithelial c-kit expression but not in those with high epithelial c-kit expression. CONCLUSIONS: This study demonstrated the association of epithelial c-kit expression with stromal histological features and stromal c-kit. Interestingly, epithelial c-kit expression affected the strength of the correlation of stromal c-kit with these histological features. These findings provide further evidence of the interaction between the epithelial and stromal components in PT.


Subject(s)
Biomarkers, Tumor/analysis , Breast Neoplasms/chemistry , Epithelial Cells/chemistry , Phyllodes Tumor/chemistry , Proto-Oncogene Proteins c-kit/analysis , Adult , Aged , Breast Neoplasms/pathology , Epithelial Cells/pathology , Female , Humans , Immunohistochemistry , Middle Aged , Mitosis , Mitotic Index , Neoplasm Grading , Phyllodes Tumor/pathology , Predictive Value of Tests , Stromal Cells/chemistry , Stromal Cells/pathology , Tissue Array Analysis , Young Adult
10.
J Clin Pathol ; 68(7): 516-21, 2015 Jul.
Article in English | MEDLINE | ID: mdl-25795733

ABSTRACT

AIMS: To determine the use of p40 and laminin 332 (LN332) immunostains for diagnosing metaplastic carcinoma by studying the expression of these and other routine markers in spindle cell metaplastic carcinomas and other malignant spindle cell tumours. METHODS: We identified cases of spindle cell metaplastic carcinoma (n=36) and other atypical/malignant spindle cell tumours, including 20 phyllodes tumours (14 borderline, six malignant) and 23 spindle cell sarcomas (three primary to breast). Immunohistochemical staining was performed for p40 and two LN332 chains, ß3 (kalinin B1) and γ2 (lamC2). The expression of these markers was compared with p63 and cytokeratins. RESULTS: p40 and p63 expression was seen in 21 of 36 (58.3%) and 33 of 36 (91.7%) metaplastic carcinomas, respectively. No phyllodes tumours showed stromal expression of p40 or p63. One of 23 (4.3%) sarcomas showed focal weak p63 staining. LamC2 and kalinin B1 expression was seen in 28 of 36 (77.8%) and 26 of 36 (72.2%) metaplastic carcinomas, respectively. LamC2 and kalinin B1 each showed positive stromal cell expression in two of 20 (10%) phyllodes tumours. No sarcomas showed staining with lamC2. Kalinin B1 staining was seen in 17 of 23 (73.9%) sarcomas, including two of three primary breast sarcomas. Cytokeratin expression was seen in 32 of 36 (88.9%) metaplastic carcinomas and diffuse staining was most often seen in 34ßE12 and CK5. CONCLUSIONS: The diagnostic value of relatively novel markers p40 and LN332 was found to be less than that of routinely used markers (p63 and cytokeratins). p40 proved to be a specific marker but lacked the sensitivity of p63, while LN332 showed staining in a significant proportion of phyllodes tumours and sarcomas.


Subject(s)
Biomarkers, Tumor/analysis , Breast Neoplasms/chemistry , Carcinoma/chemistry , Cell Adhesion Molecules/analysis , Transcription Factors/analysis , Tumor Suppressor Proteins/analysis , Adult , Aged , Aged, 80 and over , Biopsy , Breast Neoplasms/pathology , Carcinoma/pathology , Case-Control Studies , Female , Humans , Immunohistochemistry , Metaplasia , Middle Aged , Phyllodes Tumor/chemistry , Phyllodes Tumor/pathology , Predictive Value of Tests , Protein Isoforms , Sarcoma/chemistry , Sarcoma/pathology , Young Adult , Kalinin
11.
Int J Clin Exp Pathol ; 7(9): 5997-6005, 2014.
Article in English | MEDLINE | ID: mdl-25337244

ABSTRACT

This study aimed to identify expression profiles of Yes-associated protein (YAP) and its phosphorylated form (pYAP) in phyllodes tumor (PT) of human breast and verify the clinical implications. We selected PTs from the pathologic archive and reviewed the histologic features (141 benign, 27 borderline, and 15 malignant). We made tissue microarray (TMA) block from the formalin-fixed paraffin-embedded (FFPE) tissue corresponding to the representative section. Using TMA block, we performed immunohistochemical staining of YAP and pYAP. In the stromal component, expressions of YAP and pYAP were increased in borderline/malignant PT with comparison of benign PT (P = 0.002, and P < 0.001, respectively). In the epithelial component, cytoplasmic expression of YAP was highest in borderline PT (P = 0.001). Stromal YAP expression (P < 0.001) and stromal pYAP expression (P = 0.042) were associated with shorter disease-free survival (DFS) and stromal pYAP expression (P = 0.001) was associated with shorter overall survival (OS) in univariate Cox analysis. In multivariate Cox analysis, stromal YAP expression was an independent prognostic factor associated with shorter DFS (Hazard ration: 3.206, 95% CI: 1.000-10.27, P = 0.050). In conclusion, expression level of YAP in stromal component was increased along with histologic grade of PT and YAP expression in PT was related to tumor progression and poor prognosis.


Subject(s)
Adaptor Proteins, Signal Transducing/analysis , Breast Neoplasms/chemistry , Phosphoproteins/analysis , Phyllodes Tumor/chemistry , Adult , Biomarkers, Tumor/analysis , Breast Neoplasms/mortality , Breast Neoplasms/pathology , Breast Neoplasms/therapy , Disease Progression , Disease-Free Survival , Epithelial Cells/chemistry , Female , Humans , Immunohistochemistry , Kaplan-Meier Estimate , Middle Aged , Multivariate Analysis , Neoplasm Grading , Phosphorylation , Phyllodes Tumor/mortality , Phyllodes Tumor/pathology , Phyllodes Tumor/therapy , Predictive Value of Tests , Proportional Hazards Models , Retrospective Studies , Risk Factors , Stromal Cells/chemistry , Time Factors , Tissue Array Analysis , Transcription Factors , YAP-Signaling Proteins
13.
Breast Cancer Res Treat ; 141(1): 89-99, 2013 Aug.
Article in English | MEDLINE | ID: mdl-23933800

ABSTRACT

Lysyl oxidase-like 2 (LOXL2) is associated with invasiveness and metastasis in breast cancer. We analyzed the prognostic impact of LOXL2 for breast cancer patients and investigated the role of LOXL2 in breast cancer cell lines. Immunohistochemical study of LOXL2 expression was done in samples from 309 patients. Survival analysis was performed using log-rank test and Cox regression hazard model. After identification of LOXL2 expression in breast cancer cell lines, we performed matrigel invasion and wound-healing assays with LOXL2-silenced cell lines. In the human study, LOXL2 was expressed in 16.2 % of patients. Comparing the LOXL2-positive versus negative groups, there was a significantly higher proportion of estrogen receptor-negative patients (54.0 vs. 37.0 %, respectively; p = 0.029) and triple-negative patients (34.0 vs. 18.0 %; p = 0.022) in the positive group. In multivariate analysis for overall survival and metastasis-free survival, positive LOXL2 was demonstrated as a poor prognostic factor (HR 2.27 and 2.10, respectively). In vitro study indicated that LOXL2 silencing induces a mesenchymal-epithelial transition-like process in basal cell lines (MDA-MB-231 and BT549) associated with decreased invasive and migratory properties. These clinical and preclinical data confirm that higher LOXL2 expression is associated with invasiveness of basal-like breast cancer cells and lower survival of breast cancer patients. Our results suggest the clinical value of LOXL2 as a therapeutic target in breast cancer.


Subject(s)
Amino Acid Oxidoreductases/analysis , Breast Neoplasms/chemistry , Carcinoma/chemistry , Gene Expression Regulation, Neoplastic , Neoplasm Proteins/analysis , Adult , Amino Acid Oxidoreductases/biosynthesis , Amino Acid Oxidoreductases/genetics , Breast Neoplasms/genetics , Breast Neoplasms/mortality , Breast Neoplasms/pathology , Carcinoma/genetics , Carcinoma/mortality , Carcinoma/pathology , Carcinoma in Situ/chemistry , Carcinoma in Situ/genetics , Carcinoma in Situ/mortality , Carcinoma in Situ/pathology , Cell Line, Tumor , Cell Movement , Collagen , Disease-Free Survival , Drug Combinations , Epithelial-Mesenchymal Transition , Female , Humans , In Situ Hybridization , Kaplan-Meier Estimate , Laminin , Middle Aged , Neoadjuvant Therapy , Neoplasm Invasiveness , Neoplasm Metastasis , Neoplasm Proteins/biosynthesis , Neoplasm Proteins/genetics , Neoplasms, Multiple Primary/chemistry , Neoplasms, Multiple Primary/genetics , Neoplasms, Multiple Primary/mortality , Neoplasms, Multiple Primary/pathology , Phyllodes Tumor/chemistry , Phyllodes Tumor/genetics , Phyllodes Tumor/mortality , Phyllodes Tumor/pathology , Prognosis , Proportional Hazards Models , Proteoglycans , RNA Interference , RNA, Small Interfering/pharmacology , Survival Analysis , Tissue Array Analysis , Triple Negative Breast Neoplasms/chemistry , Triple Negative Breast Neoplasms/genetics , Triple Negative Breast Neoplasms/mortality , Triple Negative Breast Neoplasms/pathology
14.
Diagn Pathol ; 8: 49, 2013 Mar 26.
Article in English | MEDLINE | ID: mdl-23531415

ABSTRACT

Lesions of anogenital mammary-like glands are rare, and only 44 female cases have been reported. Herein, we describe a particularly rare case of phyllodes tumor of anogenital mammary-like glands in a 41-year-old male presenting anal bleeding. Papillectomy was performed. The excised tumor was circumscribed in shape, and after it was sliced into sections, it was noted that there were leaf-like slits on the surface of cut side. Under the microscope, the tumor was found to be biphasic, with a bland glandular epithelium and low-to-intermediate cellular stroma, which together created the leaf-like slits. Gynecomastoid hyperplasia was evident at the periphery. The epithelium showed immuno-activity for ER, PR(focal), AR, and GCDFP-15. The stromal cells showed positive staining for CD34 and vimentin. The morphology and immunophenotype were similar to benign phyllodes tumors of breast. To the best of our knowledge, this case report represents the first case of phyllodes tumor of anogenital mammary-like glands with gynecomastoid hyperplasia at the periphery in a male patient. To make a diagnosis, we had to differentiate this lesion from hidradenoma papilliferum of skin appendage, phyllodes tumor of ectopic prostatic tissue, and other tumors of anogenital mammary-like glands analogous to the breast tumor (e.g., fibroadenoma phyllodes, periductal stromal sarcoma, and spindle cell carcinoma). While gynecomastia of male breast is usually a result of hormone imbalance, our patient's tumor did not seem to be related to peripheral hormone status in the anogenital mammary-like glands. Nevertheless, because hormone imbalance has been strongly related to male breast cancer, hormone levels may need to be followed in male patients who have this rare malady. VIRTUAL SLIDES: The virtual slide(s) for this article can be found here: http://www.diagnosticpathology.diagnomx.eu/vs/1509145815899177.


Subject(s)
Anus Neoplasms/pathology , Phyllodes Tumor/pathology , Adult , Anus Neoplasms/chemistry , Anus Neoplasms/surgery , Biomarkers, Tumor/analysis , Colonoscopy , Diagnosis, Differential , Humans , Hyperplasia , Immunohistochemistry , Immunophenotyping , Male , Mammary Glands, Human/pathology , Phyllodes Tumor/chemistry , Phyllodes Tumor/surgery , Predictive Value of Tests , Stromal Cells/pathology
15.
Adv Anat Pathol ; 20(2): 95-109, 2013 Mar.
Article in English | MEDLINE | ID: mdl-23399795

ABSTRACT

Spindle cell lesions arising in the breast represent reactive, benign, and malignant tumors with overlapping morphologic, clinico-radiologic, and immunohistochemical characteristics. Moreover, common entities comprising this subset are usually uncommon entities in overall prevalence. The combination of such diagnostic "disadvantages" can make the practicing pathologist feel uncertain from the onset of encountering such a case. We hope to dispel some of this discomfort by delineating a simple algorithm that provides structure and direction to the diagnostic work-up. Finally, we provide short summaries of the most commonly encountered mammary spindle cell lesions.


Subject(s)
Breast Neoplasms/diagnosis , Carcinoma/diagnosis , Phyllodes Tumor/diagnosis , Algorithms , Biomarkers, Tumor/analysis , Breast Neoplasms/chemistry , Carcinoma/chemistry , Cell Proliferation , Female , Humans , Immunohistochemistry , Phyllodes Tumor/chemistry
16.
Breast J ; 17(2): 121-8, 2011.
Article in English | MEDLINE | ID: mdl-21306468

ABSTRACT

Neo-adjuvant chemotherapy of breast cancer provides an opportunity to evaluate predictive factors at initial tumor biopsy. We evaluated these factors on cell blocks obtained by diagnostic fine-needle cytopuncture (FNC), with respect to tumor regression and outcome. A prospective study (1996-2003, median follow-up 82 months) involved 163 patients with breast carcinoma (T2 ≥ 3 cm, T3, T4 noninflammatory) diagnosed by means of FNC. Malignancy, cytologic grade, and the presence of lymphocytes were determined on cytologic smears. Ki67, estrogen receptor (ER), progesterone receptor (PgR), HER2, and p53 expression was assessed on cell blocks by means of immunohistochemistry. All the patients received anthracycline-based chemotherapy. A combined clinical and pathologic tumor regression score was calculated. Twelve cases (7.5%) showed a complete regression, 72 cases (44%) a partial regression and 79 cases (48.5%) no regression. Factors predictive of regression were high grade, presence of lymphocytes, pN0, high Ki67 expression, hormone receptor negativity, and the "triple negative" phenotype. In univariate analysis 5-year metastasis-free survival rate (MFS) correlated with cytologic grade, pN, ER, and p53 status, while overall survival (OS) correlated with cytologic grade, type of surgery, pN, and ER status. In multivariate analysis, MFS was significantly influenced by the regression score, Ki67, age, ER status, pN, HER2, and initial tumor size. Except for age, the same parameters correlated with OS. FNC with the cell block technique is a rapid, minimally invasive, reliable, and inexpensive method for analyzing predictive biomarkers, and may thus be useful in the management of breast cancer patients requiring neo-adjuvant chemotherapy.


Subject(s)
Biomarkers, Tumor/analysis , Biomarkers/analysis , Breast Neoplasms/chemistry , Breast Neoplasms/drug therapy , Chemotherapy, Adjuvant , Phyllodes Tumor/chemistry , Phyllodes Tumor/drug therapy , Preoperative Care , Adolescent , Adult , Aged , Biopsy, Fine-Needle , Breast Neoplasms/pathology , Breast Neoplasms/surgery , Female , Follow-Up Studies , Humans , Mastectomy , Middle Aged , Phyllodes Tumor/pathology , Phyllodes Tumor/surgery , Predictive Value of Tests , Prognosis , Retrospective Studies , Treatment Failure , Young Adult
17.
Breast Cancer Res Treat ; 129(2): 319-29, 2011 Sep.
Article in English | MEDLINE | ID: mdl-20945089

ABSTRACT

Phyllodes tumors of the breast are rare fibroepithelial neoplasms with a potential for recurrence. Current histological classification is not always predictive of clinical behavior. The aim of this study was to identify genetic changes associated with the development of borderline and malignant phyllodes tumors in an Asian population, and to assess if genetic data supported the categorization of these tumors into the existing three grades of benign, borderline, and malignant. Expression profiling of 21 phyllodes tumors (6 benign, 10 borderline, 5 malignant) was performed using Affymetrix U133Plus 2.0 GeneChips(®). Gene expression among benign, borderline, and malignant tumors was compared and a 29 gene list was able to classify them according to their histologic grade. Among these 29 genes are those responsible for matrix formation, cell adhesion, epidermis formation, and cell proliferation. Comparative genomic microarray analysis showed that the most common chromosomal alteration associated with borderline and malignant tumors was 1q gain, and an increasing number of chromosomal changes was noted with increasing histological grade. Upregulation of HOXB13 was seen in malignant relative to borderline phyllodes tumors and further investigated by immunohistochemistry in a corresponding set of formalin-fixed, paraffin-embedded tumors. HOXB13 protein overexpression was found to be correlated with stromal hypercellularity and atypia (P = 0.03, P = 0.039, respectively) and may be implicated in the development of malignant phyllodes tumors.


Subject(s)
Breast Neoplasms/genetics , Phyllodes Tumor/genetics , Adult , Aged , Asian People/genetics , Breast Neoplasms/chemistry , Breast Neoplasms/classification , Breast Neoplasms/ethnology , Breast Neoplasms/mortality , Breast Neoplasms/pathology , Chi-Square Distribution , Comparative Genomic Hybridization , Disease Progression , Female , Gene Expression Profiling/methods , Gene Expression Regulation, Neoplastic , Gene Regulatory Networks , Homeodomain Proteins/analysis , Homeodomain Proteins/genetics , Humans , Immunohistochemistry , Middle Aged , Neoplasm Grading , Oligonucleotide Array Sequence Analysis , Phyllodes Tumor/chemistry , Phyllodes Tumor/classification , Phyllodes Tumor/ethnology , Phyllodes Tumor/mortality , Phyllodes Tumor/pathology , Prognosis , Singapore/epidemiology , Survival Rate , Time Factors
18.
Mod Pathol ; 23(11): 1438-48, 2010 Nov.
Article in English | MEDLINE | ID: mdl-20693983

ABSTRACT

Wnt signalling pathway is known to have a critical role in carcinogenesis and in epithelial-to-mesenchymal transition. Upon Wnt activation, ß-catenin is translocated from the membrane to the cytoplasm and nucleus, where it interacts with transcriptional activators. It has been suggested that various spindle cell lesions of the breast may harbour Wnt pathway activation. Given that ß-catenin nuclear localization constitutes a good surrogate marker of Wnt canonical pathway activation, we have investigated the distribution of ß-catenin in spindle cell lesions of the breast and whether it could be employed in the differential diagnosis of these lesions. A total of 52 metaplastic breast carcinomas, eight fibromatoses and 23 phyllodes tumours were retrieved from our institutions' archives. We performed immunohistochemistry using two anti-ß-catenin antibodies. In all, three fibromatoses and 21 metaplastic breast carcinomas were subjected to CTNNB1 (ß-catenin encoding gene) mutation analysis by direct gene sequencing. A good correlation between the two antibodies was observed (Spearman's r>0.82, P<0.001). All fibromatoses and 23% of metaplastic breast carcinomas expressed nuclear ß-catenin. In fibromatosis, ß-catenin was more often diffusely expressed, whereas in metaplastic breast carcinomas, expression was more frequently focal. Membranous ß-catenin expression was significantly lower in spindle cell carcinomas than in other subtypes of metaplastic breast carcinomas. In phyllodes tumours, stromal cells of benign and malignant subtypes displayed nuclear ß-catenin expression in 94 and 57% of cases, respectively. No CTNNB1 mutation was identified in any of the 21 metaplastic carcinomas analysed, whereas the mutations 45S>S/P and 41T>T/A were found in samples of fibromatosis. In conclusion, ß-catenin nuclear expression is a common feature in fibromatoses and in the stromal component of phyllodes tumours, but may also be observed in metaplastic breast carcinomas. ß-catenin nuclear expression should not be used as a single marker to differentiate fibromatosis from other spindle cell tumours of the breast.


Subject(s)
Biomarkers, Tumor/analysis , Breast Neoplasms/chemistry , Carcinoma/chemistry , Fibroma/chemistry , Phyllodes Tumor/chemistry , Signal Transduction , Wnt Proteins/analysis , beta Catenin/analysis , Biomarkers, Tumor/genetics , Breast Neoplasms/genetics , Breast Neoplasms/pathology , Carcinoma/genetics , Carcinoma/pathology , Cell Nucleus/chemistry , DNA Mutational Analysis , Diagnosis, Differential , England , Female , Fibroma/genetics , Fibroma/pathology , France , Humans , Immunohistochemistry , Metaplasia , Mutation , Phyllodes Tumor/genetics , Phyllodes Tumor/pathology , Predictive Value of Tests , Signal Transduction/genetics , beta Catenin/genetics
19.
Virchows Arch ; 456(5): 587-93, 2010 May.
Article in English | MEDLINE | ID: mdl-20182743

ABSTRACT

A 37-year-old Japanese man with a solid and cystic pancreatic mass was referred to our hospital. Computed tomography revealed a well-demarcated solid and cystic mass measuring approximately 3.0 cm in diameter in the pancreatic body. The patient underwent middle segment pancreatectomy, and the retrieved tumor specimen was found to be a well-demarcated solid and cystic lesion measuring 3.0 x 3.0 cm. On histological examination, the cyst walls were found to be lined with a monolayer of non-atypical tall columnar epithelial cells. The solid areas surrounded the cystic ones and showed storiform proliferation of spindle cells that contained round, oval, or elongated nuclei and were present among abundant collagen fibers. The solid areas sent phylloid projections into the cystic spaces and the main pancreatic duct. The spindle cells were found to be diffusely positive for alpha-smooth muscle actin, desmin, and h-caldesmon on immunohistochemical analysis. Electron microscopy revealed that these cells possessed well-developed myofilaments with dense bodies, pinocytic vesicles, and basal lumina. Neither metastasis nor local invasion was detected. After the operation (4 years), tumor recurrence has not occurred. The main differential diagnoses of spindle cell tumors are leiomyomas, leiomyosarcomas, inflammatory myofibroblastic tumors, solitary fibrous tumors, extra-gastrointestinal stromal tumors, and schwannomas. However, the histological findings in the present case differed from those of these tumors. The present lesion is the first reported case of a primary pancreatic phyllodes tumor.


Subject(s)
Pancreatic Neoplasms/pathology , Phyllodes Tumor/pathology , Actins/analysis , Adult , Calmodulin-Binding Proteins/analysis , Desmin/analysis , Humans , Immunohistochemistry , Male , Pancreatic Neoplasms/chemistry , Pancreatic Neoplasms/ultrastructure , Phyllodes Tumor/chemistry , Phyllodes Tumor/ultrastructure
20.
Arch Pathol Lab Med ; 133(5): 713-21, 2009 May.
Article in English | MEDLINE | ID: mdl-19415945

ABSTRACT

CONTEXT: The morphologic spectrum of mammary fibroepithelial lesions ranges from fibroadenoma, a common benign neoplasm, to phyllodes tumor, an uncommon lesion that can sometimes recur and metastasize. OBJECTIVE: To focus on problems encountered in the diagnostic evaluation of fibroepithelial tumors, highlighting the diagnostically relevant morphologic features and providing an update on the immunohistochemical profile and genetic alterations of these rare neoplasms. DATA SOURCES: A PubMed search of the English-language literature identified published reports on fibroepithelial lesions, with a special focus on phyllodes tumor. The results and conclusions of these studies form the basis of this review. CONCLUSIONS: The distinction between fibroadenoma and phyllodes tumor is usually not problematic, especially in excision specimens. In some cases, however, the diagnostic evaluation of fibroepithelial lesions can be challenging, especially if only limited material is available. Morphologic predictors of local recurrence of phyllodes tumor include cellularity and cytologic atypia, mitotic activity, positive margins, infiltrative borders, fibroproliferative satellite nodules, and past history of fibroadenoma. Predictors of distant metastasis include size, tumor necrosis, and stromal overgrowth. None of these parameters, however, constitutes a definite marker of malignancy. Presently, molecular and immunohistochemical techniques play a limited role in the diagnosis of fibroepithelial lesions.


Subject(s)
Breast Neoplasms/diagnosis , Fibroadenoma/diagnosis , Phyllodes Tumor/diagnosis , Biomarkers, Tumor/analysis , Breast Neoplasms/chemistry , Breast Neoplasms/genetics , DNA, Neoplasm/analysis , Diagnosis, Differential , Female , Fibroadenoma/chemistry , Fibroadenoma/genetics , Gene Expression , Humans , Immunoenzyme Techniques , Neoplasm Recurrence, Local , Phyllodes Tumor/chemistry , Phyllodes Tumor/genetics , Phyllodes Tumor/secondary
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