This case describes an infiltrating breast tumour with thyroid transcription factor-1 (TTF-1) positive staining and ductal differentiation in a 72-year-old woman. The presence of ductal carcinoma in situ with positive TTF-1 is a strong indication that this is a primary tumour and not a metastasis from lung.On PET scan and CT follow up there were no other tumours found in this patient. We are no...

Salivary ductal carcinomas (SDCs) are extremely rare and aggressive malignancies, accounting for approximately 6% of all salivary gland malignancies. One distinct feature is their resemblance to ductal carcinomas of breast. A significant percentage of SDCs overexpress Her2 and the use of targeted therapy with trastuzumab can be considered in these patients. We report a rare case of long term di...

Background & Aims: This study was performed to investigate possible relationships between the manifestation of stromal cells (fibroblasts and/or myofibroblasts) by focusing on expression of their matrix metalloproteinase 9 (MMP9) and possible angiogenesis based on CD31 and CD34 antigen expression during the various steps of hyperplastic changes to precancerousstate and invasive breast cancer. M...

Primary lacrimal sac tumor is extremely rare, and moreover, glandular tumor is exceptional. Herein, we described the first documented case of primary ductal adenocarcinoma of the lacrimal sac. A 79-year-old Japanese female presented with persistent swelling of her left lower eyelid. Computed tomography demonstrated an irregular-shaped tumor involving the left lacrimal sac, lower eyelid, sinonas...

Objectives. The "Sick Lobe" hypothesis states that breast cancers evolve from entire lobes or portions of lobes of the breast where initiation events have occurred early in development. The implication is that some cancers are isolated events and others are truly multi-focal but limited to single lobar-ductal units. Methods. This is a single surgeon retrospective review of early stage breast ca...

Intraductal papillary mucinous neoplasms (IPMNs) are mucin-producing papillary neoplasms of the pancreatic or biliary ductal system that exhibit variable cellular atypia and cause ductal dilation. There are few reported cases of IPMN arising from the biliary tree in the literature. It has a higher propensity to undergo malignant transformation compared to IPMN arising from the pancreatic duct. ...

AIMS To determine if allelic loss on chromosomes 16q and 17p, commonly encountered in in situ and invasive ductal carcinomas, is present in atypical ductal hyperplasia (ADH); to determine whether ADH is a neoplastic (clonal) or hyperplastic (polyclonal) proliferation. METHODS Fourteen cases of ADH were examined for allele loss at loci on chromosome 16q and 17p using a microdissection techniqu...

PURPOSE Mucins are members of the glycoprotein family expressed in benign and malignant epithelial cells. The aim of this study is to evaluate the relationships between the expression of mucins in breast ductal carcinoma and clinicopathologic parameters. METHODS We constructed tumor microarrays based on 240 cases of invasive ductal carcinoma and 40 cases of ductal carcinoma in situ (DCIS) usi...

The majority of human pancreatic adenocarcinomas display a ductal phenotype; experimental studies indicate that tumors with this phenotype can arise from both acinar and ductal cells. In normal pancreas acinar cells, the pancreas transcription factor 1 transcriptional complex is required for gene expression. Pancreas transcription factor 1 is a heterooligomer of pancreas-specific (p48) and ubiq...

OBJECTIVE The majority of the tumors in periampullary region are pancreatic and ampulla of Vater carcinomas. The aim of this study was to compare histopathological features of ampulla of Vater carcinomas with pancreatic ductal adenocarcinomas and to determine diagnostic and predictive values of p16 protein and cyclin D1 expression. MATERIAL AND METHOD Tissue samples from pancreatic ductal ade...