Publications by authors named "Chi-Yuan Tzen"

Context: Sentinel lymph node (SLN) biopsy is the standard of care for breast cancer (BC) patient staging. The axillary node status can be evaluated by frozen section (FS) or imprint cytology (IC). Despite the major disadvantages of tissue loss and freezing artifact in FS, many pathologists consider SLN IC a more difficult task requiring special expertise and prefer FS to IC.

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Subungual schwannoma is quite rare and often causes nail deformity and difficulty in wearing shoes. Complete tumor excision is the treatment of choice, and we advocate that restoring the nail appearance should be considered at the same time. We present the case of 43-year-old man with a big toe subungual schwannoma.

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Gastric polyposis is a rare disease. Not all polyps progress to cancer. Monoallelic mutation in Fanconi anemia (FA) genes, unlike biallelic gene mutations that causes typical FA phenotype, can increase risks of cancers in a sporadic manner.

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Growth differentiation factor-10 (GDF10), commonly referred as BMP3b, is a member of the transforming growth factor-β (TGF-β) superfamily. GDF10/BMP3b has been considered as a tumor suppressor, however, little is known about the molecular mechanism of its roles in tumor suppression in oral cancer. Clinical significance of GDF10 downregulation in oral squamous cell carcinoma (OSCC) was evaluated using three independent cohorts of OSCC patients.

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Primary salivary gland-type lung cancers are a rare group of tumors. When they do occur, the most common type is adenoid cystic carcinoma, followed by mucoepidermoid carcinoma. Primary high-grade salivary-type duct carcinoma (HGSDC) arising in the lung has not been described.

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hPuf-A is a member of RNA-binding PUF family that regulates mRNA translation. Redistribution of hPuf-A from the nucleolus to the nucleoplasm upon genotoxic stress modulates the poly(ADP-ribosyl)ation activity of PARP-1. Here, we report a novel function of hPuf-A involved in promoting breast cancer progression.

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Sebaceous gland carcinoma (SGC) of the eyelid is a highly malignant neoplasm that arises from the meibomian glands, glands of Zeis, and sebaceous glands of the skin. The characteristics of this disease are high recurrence rate, significant metastatic potential, and notable mortality rate, which are quite different from basal cell carcinoma (BCC). We report the case of a 37-year-old woman with the history of left lower eyelid BCC (diagnosed 9 years ago), who had left parotid lymph nodes metastases and local recurrence twice.

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Aims: To determine risk factors for recurrence of desmoid-type fibromatosis (aggressive fibromatosis).

Methods: Forty-six cases of desmoid-type fibromatosis in Taiwanese patients were analysed for an association between tumour recurrence and clinical features, pathology, and the presence of p53 protein and beta-catenin on immunohistochemical staining.

Results: Six (13%) of 46 patients developed recurrence after surgical resection.

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Background: Epidemiologic studies have shown that obesity is associated with an increased risk of thyroid cancer. Leptin, an adipocyte-derived cytokine, can act as a growth factor on certain normal and transformed cells. Aberrant expression of leptin or leptin receptor has been detected in some types of cancer.

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We report a patient with congenital generalized lipodystrophy who had suffered from seizures, myoclonus, ataxia and cognitive decline since late childhood. Lafora disease was diagnosed based on skin biopsy results, which revealed pathognomonic Lafora bodies. The results of genetic analysis for mutations in EPM2A and EPM2B genes were negative.

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Background: The likelihood of thyroid cancer is similar in patients with one or more nodules, but tumor characteristics of thyroid cancer in glands with multinodular goiter are unclear.

Materials And Methods: This study consisted of 100 consecutive patients (ages 15-81 years; 84 women), who underwent thyroidectomy for papillary or follicular thyroid carcinoma between 2005 and 2006. Patient demographics, diagnostic tests, operations, and pathological findings were reviewed.

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The purpose of this study was to evaluate the presence of the hyperdense appendix in acute appendicitis. The CT scans of 183 patients with pathologically proven acute appendicitis were reviewed to determine the prevalence of a hyperdense appendix, defined as a high-attenuated appendix when compared with the adjacent cecal wall on precontrast CT. A control group consisted of 100 patients with CT examinations performed in the emergency department were also randomly allocated to search for any hyperdense appendix in other disease conditions.

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The aim of this study is to estimate the incidence of the gastrointestinal stromal tumor after the previous diagnoses were confirmed and/or revised by both immunohistochemical and mutational analyses. We reviewed 17,858 surgically excised gastrointestinal lesions in our hospital from 1998 to 2004. All mesenchymal tumors were examined for CD117 expression by immunohistochemistry, and every CD117-negative mesenchymal tumors were further subjected to mutational analysis for KIT and PDGFRA exons.

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Constrictive pericarditis (CP) following hemopericardium has been reported in the literature but its pathogenesis is open to question. Proposed mechanisms include trauma leading to damage of the mesothelial lining resulting in decreased fibrinolytic activity in the presence of blood. We present a patient who sustained blunt thoracoabdominal trauma in a car accident and subsequently developed delayed hemopericardium leading to constrictive pericarditis and impending cardiac tamponade.

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Introduction: Phyllodes tumors of the breast are uncommon, and it is difficult to predict biologic behavior based on clinicopathologic features. Despite the wealth of data on the factors to predict recurrence, little is known about the impact of treatment refinements. This study seeks to define changes in patient characteristics, histopathologic parameters, and outcome between the two periods before and after the care of patients with breast diseases was centralized to a breast specialty.

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Background: The role of mycobacterial infection, particularly related to Mycobacterium avium subsp paratuberculosis (Map), in Crohn's disease has long been debated. We developed primer pairs capable of detecting a broad spectrum of mycobacterium and employed them to investigate surgical specimens from patients with Crohn's disease.

Methods: Pan mycobacterium primers of the 65-kDa heat shock protein gene (Hsp65) were used in a polymerase chain reaction (PCR) to examine 12 surgically-resected, formalin-fixed, paraffin-embedded specimens from 11 patients with Crohn's disease.

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We report 2 cases of Aspergillus pseudomembranous tracheobronchitis in patients with diabetes. The first patient succumbed to progressive obstructive respiratory failure despite mechanical ventilation and antifungal therapy. However, the second patient survived.

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Aim: To compare the efficacy and toxicity of a three-step combination therapy with post-operative radiation alone for locally advanced esophageal cancer.

Methods: Patients with T3-4 and N0-1 esophageal carcinoma from a number of institutions were non-randomly, prospectively enrolled in the study. All patients underwent single-stage curative en bloc esophagectomy.

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Background And Objectives: Phyllodes tumors (PTs) are uncommon biphasic breast tumors that usually occur in adult females. They are composed of a benign epithelial component and a cellular, spindle cell stroma forming a leaf-like structure. No one morphologic finding is reliable in predicting the clinical behavior of the tumor.

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