Adenoid cystic carcinoma presenting as a midpalatal nodular mass with slow growth and long evolution: a case report with review of differential diagnosis.

Adenoid cystic carcinoma is an aggressive but slow-growing salivary gland tumor most commonly appearing in the palate. Though it is well recognized that this tumor has a slow-growing course, a clinical presentation of 10 years is uncommon. This article presents a case of a midpalatal nodular mass with a reported history of 10 years.

Expression of cornulin in oral premalignant lesions.

Objective: The aim of this study was to evaluate expression of cornulin in oral mucosa as an adjunct to histopathologic grading of oral epithelial dysplasia (OED).

Study Design: Biomarker expression was assessed in normal oral mucosa, low-grade OED (LD), high-grade OED (HD), and oral squamous cell carcinoma (OSCC) by using immunohistochemistry. Photomicrographs were evaluated with Aperio Imagescope using a positive-pixel-counting algorithm.

Non-calcifying Langerhans Cell-Rich Variant of Calcifying Epithelial Odontogenic Tumor: A Distinct Entity with Predilection for Anterior Maxilla.

Calcifying epithelial odontogenic tumor (CEOT) is an uncommon locally invasive epithelial odontogenic tumor of the jaws associated with amyloid production. Intraosseous presentations are most common and they frequently occur in the posterior mandible. A non-calcifying Langerhans cell-rich variant of CEOT (NCLC CEOT) has been described with predilection for the anterior maxilla.

Diagnostic Challenges in the Fine Needle Aspiration Biopsy of Chronic Sclerosing Sialadenitis (Küttner's Tumor) in the Context of Head and Neck Malignancy: A Series of 4 Cases.

Chronic sclerosing sialadenitis (CSS) is a benign chronic inflammatory condition of the salivary gland. Clinically, CSS patients may present with a neck mass, often suggesting a neoplastic process. Fine-needle aspiration (FNA) is frequently used to evaluate these lesions.

Novel Clonal der(9)t(5;9)(q31;q34) Cytogenetic Translocation in a Giant Cell Tumor of Bone.

Giant cell tumor of the bone (GCTB) is a benign but locally aggressive neoplasm of long bones with higher chances of local recurrence. Many cytogenetic studies have reported clonal telomeric associations with GCTB. Here, we report for the first time a novel clonal translocation, der(9)t(5;9)(q31;q34), in a 25-year-old male patient with GCTB in the left distal femur.

Matrix metalloproteinase expression during blastema formation in regeneration-competent versus regeneration-deficient amphibian limbs.

We used an antibody array to compare the protein expression of matrix metalloproteinases (MMPs)-1, -2, -3, -8, -9, -10, and -13, as well as the tissue inhibitors of metalloproteinases (TIMPs)-1, -2, and -4 during blastema formation in amputated hindlimbs of regeneration-competent wild-type axolotls and stage-54 Xenopus, and regeneration-deficient short-toes axolotls and Xenopus froglets. Expression of MMP-9 and -2 was also compared by zymography. Both short-toes and froglet failed to up-regulate MMPs in a pattern comparable to the wild-type axolotl, suggesting that subnormal histolysis is at least in part responsible for the poor blastema formation characteristic of both short-toes and froglet.