Adenoma, Sweat Gland ; metabolism ; Diagnosis, Differential ; Humans ; Keratin-14 ; metabolism ; Keratin-17 ; metabolism ; Keratin-18 ; metabolism ; Keratin-7 ; metabolism ; Keratins ; metabolism ; Papilloma ; metabolism ; Sebaceous Gland Neoplasms ; metabolism ; Skin Neoplasms ; metabolism ; Sweat Gland Neoplasms ; metabolism

OBJECTIVETo compare the expression patterns of cytokeratin 7 (CK7) and CK20 in the Barrett's esophagus and gastric cardia intestinal metaplasia.

METHODSEndoscopic biopsy specimens from 19 patients with long segment Barrett's esophagus, 36 with short segment Barrett's esophagus, and 20 with histological evidence of gastric cardia intestinal metaplasia were immunostained for CK7 and CK20. The immunohistochemical data were analyzed in relation with the clinicopathological data of the patients including age, hiatal hernia, and Helicobacter pylori status.

RESULTSThe Barrett's pattern of CK7/20 expressions was found in all the 19 patients with long segment Barrett's esophagus, in 31 of the 36 (82%) patients with short segment Barrett's esophagus, and in 2 of the 20 (10%) patients with gastric cardia intestinal metaplasia. Patients with short segment Barrett's esophagus who had a Barrett's CK7/20 pattern showed similar clinicopathological findings to those with long segment Barrett's esophagus, while in cases of short segment Barrett's esophagus where no Barrett's CK7/20 pattern was found, the clinicopathological features were similar to those of gastric cardia intestinal metaplasia cases.

CONCLUSIONA Barrett's CK7/20 expression pattern is an objective marker of Barrett's mucosa. CK7 and CK20 reactivity patterns in routine endoscopic biopsy samples can reliably identify the location of intestinal metaplasia in the esophagus and stomach.

Adult ; Aged ; Barrett Esophagus ; diagnosis ; metabolism ; pathology ; Biomarkers ; metabolism ; Cardia ; metabolism ; pathology ; Female ; Humans ; Keratin-20 ; metabolism ; Keratin-7 ; metabolism ; Male ; Middle Aged ; Reagent Kits, Diagnostic

Adenoma, Villous ; metabolism ; pathology ; surgery ; Aged ; Diagnosis, Differential ; Female ; Humans ; Keratin-20 ; metabolism ; Keratin-7 ; metabolism ; Mullerian Ducts ; pathology ; Papilloma ; pathology ; Vaginal Neoplasms ; metabolism ; pathology ; surgery

Adenocarcinoma, Mucinous ; metabolism ; pathology ; surgery ; Aged ; Diagnosis, Differential ; Facial Neoplasms ; metabolism ; pathology ; surgery ; Gastrointestinal Neoplasms ; metabolism ; pathology ; Humans ; Keratin-19 ; metabolism ; Keratin-20 ; metabolism ; Keratin-7 ; metabolism ; Male ; Receptors, Estrogen ; metabolism ; Skin Neoplasms ; metabolism ; pathology ; surgery

No abstract available.
Carcinoma, Hepatocellular/*pathology ; Humans ; Immunohistochemistry ; Keratin-7/metabolism ; Liver Neoplasms/*pathology ; Magnetic Resonance Imaging ; Male ; Middle Aged

OBJECTIVETo evaluate the diagnostic approach and criteria for intraductal papillary neoplasms of breast.

METHODSAccording to the criteria of 2003 WHO classification, 187 cases of intraductal papillary neoplasm of breast were identified and enrolled into the study. The clinical and histologic features were reviewed and immunohistochemical study for CD10, p63, CK14, CK5/6, CK7, MGB1 and p53 were carried out on 53 cases.

RESULTSAmongst the 187 cases studied, there were 128 cases of intraductal papilloma, 16 cases of atypical intraductal papilloma and 43 cases of intraductal papillary carcinoma. They showed a spectrum of morphologic features including epithelial and stromal hyperplasia and secondary changes. The expression of myoepithelial markers, including CD10 and p63, significantly decreased in ascending order from intraductal papillomas, atypical intraductal papillomas and intraductal papillary carcinomas (P < 0.001). The expression of basal cell markers, including CK5/6 and CK14, showed a mosaic pattern in benign lesions and significantly decreased or was absent in atypical and carcinomatous lesions (P < 0.001). In contrast, the luminal cell marker CK7 expressed in the three groups with no statistically significant difference (P = 0.06). On the other hand, the expression of MGB1 in intraductal papillary carcinomas was much lower than that in the other two groups (P = 0.002 and P = 0.007). The staining for p53 was negative in all of the three groups.

CONCLUSIONSIntraductal papillary neoplasms of breast represent a heterogeneous group of lesions with various morphologic appearances. Correlation with immunostaining results for myoepithelial markers, basal-type cytokeratins and luminal epithelial markers are helpful in arriving at a definitive diagnosis.

Adult ; Breast Neoplasms ; metabolism ; pathology ; Carcinoma, Intraductal, Noninfiltrating ; metabolism ; pathology ; Carcinoma, Papillary ; metabolism ; pathology ; Diagnosis, Differential ; Female ; Humans ; Immunohistochemistry ; Keratin-14 ; metabolism ; Keratin-5 ; metabolism ; Keratin-6 ; metabolism ; Keratin-7 ; metabolism ; Mammaglobin A ; metabolism ; Middle Aged ; Neprilysin ; metabolism ; Papilloma, Intraductal ; metabolism ; pathology ; Transcription Factors ; metabolism ; Tumor Suppressor Proteins ; metabolism

OBJECTIVETo study the diagnostic value of SATB2, together with CK7 and CK20, in colorectal cancer.

METHODSImmunohistochemical study for SATB2, CK7 and CK20 was carried out in 210 cases of colorectal cancer tissue, 100 cases of non-colorectal cancer tissue, 90 cases of lymph node metastases and 50 cases of normal colorectal mucosa.

RESULTSThe sensitivity and specificity of CK20+/CK7- immunophenotype for diagnosis of colorectal adenocarcinoma were 78.1% and 92.0%, respectively. When triple markers were used, the immunophenotype CK20+/CK7-/SATB2+ had a sensitivity of 57.1% and a specificity of 98.0%. When combining the immunophenotype of SATB2+/CK7- or CK20+/CK7-, the sensitivity was 85.7% and specificity was 90.0%.

CONCLUSIONSA panel of immunohistochemical markers SATB2, CK7 and CK20 could increase the specificity for diagnosis of colorectal adenocarcinoma significantly. SATB2 is considered as a useful adjunct in this respect.

Adenocarcinoma ; diagnosis ; metabolism ; Biomarkers, Tumor ; metabolism ; Colorectal Neoplasms ; diagnosis ; metabolism ; Humans ; Immunophenotyping ; Keratin-20 ; metabolism ; Keratin-7 ; metabolism ; Lymphatic Metastasis ; Matrix Attachment Region Binding Proteins ; metabolism ; Sensitivity and Specificity ; Transcription Factors ; metabolism

Actins ; metabolism ; Aged ; Aged, 80 and over ; Carcinoma, Renal Cell ; metabolism ; pathology ; Cell Differentiation ; Female ; Humans ; Immunohistochemistry ; Keratin-7 ; metabolism ; Keratin-8 ; metabolism ; Kidney Neoplasms ; metabolism ; pathology ; Male ; Middle Aged ; Sarcoma ; metabolism ; pathology ; Vimentin ; metabolism

Carcinoma, Squamous Cell ; metabolism ; pathology ; surgery ; Female ; Follow-Up Studies ; Humans ; Keratin-7 ; metabolism ; Keratins ; metabolism ; Kidney Neoplasms ; metabolism ; pathology ; surgery ; Kidney Pelvis ; Middle Aged ; Mucin-1 ; metabolism

Adenocarcinoma, Follicular ; Adult ; Carcinoid Tumor ; metabolism ; pathology ; Carcinoma, Renal Cell ; metabolism ; pathology ; surgery ; Diagnosis, Differential ; Female ; Humans ; Keratin-7 ; metabolism ; Kidney Neoplasms ; metabolism ; pathology ; surgery ; Mucin-1 ; metabolism