Indolent T-cell Lymphoproliferative Disorder of the Gastrointestinal Tract Mimicking Crohn's Disease.

Indolent clonal T-cell lymphoproliferative disorder (iCTLD-GI)/indolent T-cell lymphoma of the gastrointestinal tract (iTLP-GI) poses diagnostic challenges, and despite its rarity, accurate diagnosis is crucial for appropriate management. We report the case of 34-year-old female with a 19-year history of gastrointestinal symptoms suggestive of inflammatory bowel disease (IBD). Subsequent evaluation revealed iCTLD-GI/iTLP-GI with extensive Crohn's disease-like morphological alterations, previously unreported.

Major salivary gland enlargement in IgG4-related disease is associated with multiorgan involvement and higher basal disease activity.

To evaluate if major salivary gland enlargement in patients with IgG4-related disease (IgG4-RD) is associated with systemic involvement. We included 47 patients with diagnosis of IgG4-RD. We retrospectively collected demographics, organ involvement, disease activity and damage assessed by the IgG4-RD Responder Index (IgG4-RD RI) and treatment.

Malignant Shamblin III Carotid Body Tumors Resected with Use of the Retrocarotid Dissection Technique in 2 Patients.

Carotid body tumors are rare neoplasms with malignant potential in 6% to 12.5% of cases, and surgical resection is the only cure. We present the cases of 2 female patients who had expanding, painless, right-sided neck masses; computed tomographic angiograms revealed Shamblin III tumors at the carotid bifurcation.

Phosphaturic mesenchymal tumors. Survey of 8 cases from a single Mexican medical institution.

Phosphaturic mesenchymal tumor (PMT) is a morphologically heterogeneous soft tissue and bone neoplasm, producing a paraneoplastic syndrome due to phosphate wasting. These tumors produce fibroblast growth factor 23, which is implicated in renal tubule phosphate loss. Medical records of patients seen from 1999 to 2013 with osteomalacia associated or not with a tumor were reviewed.

Thyroid-like cholangiocarcinoma of the liver: an unusual morphologic variant with follicular, trabecular and insular patterns.

We report the case of a 26-year-old woman with a 19 cm malignant hepatic neoplasm with morphological features that closely resembled a follicular thyroid carcinoma. Despite this, it was interpreted as a cholangiocarcinoma due to the absence of a primary thyroid tumor and the lack of thyroglobulin and TTF-1 immunoreactivity by the hepatic tumor. The left hepatic lobectomy specimen showed an encapsulated and multinodular gray-white mass with cystic and hemorrhagic areas.

Inflammatory myofibroblastic tumor of the liver.

 Hepatic inflammatory myofibroblastic tumors are uncommon low grade malignant neoplasms. They can be confused clinically and by imaging studies with abscess.

Clinical and Immunopathologic Profile of Mexican Patients with IgG4 Autoimmune Pancreatitis.

Autoimmune pancreatitis is part of the spectrum of IgG4-associated diseases. Its diagnostic criteria and histological subtypes have been formally proposed recently and although based on current data it has been suggested that there are differences in clinical presentation among populations, more research is needed to properly establish if this heterogeneity exists. In this paper, we describe 15 cases of autoimmune pancreatitis diagnosed at a Mexican centre of reference, all of them associated to the lymphoplasmocytic sclerosing pancreatitis variant.

Spindle epithelial tumor with thymus-like differentiation of the thyroid (SETTLE): Report of two cases (one associated with a parathyroid adenoma).

Spindle epithelial tumor with thymus-like differentiation (SETTLE) is a rare tumor usually localized in the thyroid gland and perithyroid tissues. It is considered to arise from ectopic thymic tissue or branchial pouch remnants. It occurs more frequently in children and adolescents.

Multiple venous and arterial thromboses of the gallbladder causing acute cholecystitis. A previously undescribed complication of essential thrombocythemia.

Well established complications of essential thrombocythemia are multiple thrombohemorrhagic phenomena in various abdominal organs. We describe the case of a 22 year old man with essential thrombocythemia and thrombosis of the mesenteric and splenic veins as well as cavernomatous transformation of the portal vein. The patient also had a splenic infarction and a subphrenic hematoma.

Unusual metastases of papillary thyroid carcinoma: report of 2 cases.

We present 2 cases of papillary thyroid carcinoma (PTC) with conventional morphology that metastasized to unusual sites. The first neoplasm was a PTC whose initial clinical manifestation was a large metastasis in the pancreas which mimicked a primary neoplasm. The mediastinal location of the thyroid gland was responsible for the delay in identification of the primary tumor.

Inverted urothelial papilloma of the urinary bladder with focal papillary pattern: a previously undescribed feature.

We report 2 examples of inverted urothelial papillomas with a focal papillary pattern. Both patients, a 43-year-old man and a 13-year-old adolescent boy, presented with hematuria. In addition to the characteristic trabecular endophytic growth pattern and bland cytologic features, the tumors showed focal papillary architecture in the endophytic component.

[Peutz-Jeghers syndrome].

Objective: To describe the demographic, clinical characteristics and associated diseases in eight patients with the Peutz-Jeghers syndrome seen at the INCMNSZ and literature review.

Setting: National Institute of Health.

Design: Description of eight cases of Peutz-Jeghers syndrome and literature review.

[Endocrine neoplasm of the stomach. Study of thirteen cases].

A Thirteen patients with primary endocrine neoplasm of the stomach were studied for 20 years. Six patients were male and 7 female with an age range of 33 to 77, mean age 57 years. Nine cases corresponded to well differentiated carcinoids and four to neuroendocrine carcinomas.

Epidermal growth factor receptor expression correlates with poor survival in gastric adenocarcinoma from Mexican patients: a multivariate analysis using a standardized immunohistochemical detection system.

The aim of the study was to determine epidermal growth factor receptor (EGFR) expression in gastric adenocarcinoma by standardized immunohistochemistry and to correlate EGFR expression with clinical features and patient survival. EGFR expression was investigated in paraffin sections of resection specimens of 89 gastric carcinomas from Mexican Mestizo patients using standardized immunohistochemistry with antigen retrieval (Dako EGFRpharmDx assay detection system). Membrane staining of EGFR was evaluated in the neoplastic cells and graded using a semiquantitative score (0-3+).

Expression of nerve growth factor in human pancreatic beta cells.

Nerve growth factor (NGF) is an important modulator of rat pancreatic beta-cell physiology in vitro. In this study, we analysed the expression of NGF, TrkA and insulin in human pancreatic islets from normal, ductal adenocarcinoma and insulinoma-afflicted samples, using double immunofluorescent labelling and confocal microscopy. We found that in normal human pancreas, insulin and NGF are co-expressed in beta cells.

Telomerase activity in well-differentiated papillary thyroid carcinoma correlates with advanced clinical stage of the disease.

Clinical relevance and stage correlation of telomerase activity in well-differentiated papillary thyroid carcinoma (WD PTC) has not been well determined, as its reported activity could be due to the analysis of tumors with lymphocytic infiltrates or aggressive variants of papillary carcinomas. We conducted a prospective study of telomerase activity in WD PTC without inflammatory infiltrates and correlated it with clinical stage. Fifty WD PTCs were analyzed for telomerase activity by PCR-based TRAP (telomeric repeat amplification protocol) assay.

[Role of laparoscopy with ultrasound in the staging process of pancreatic and ampullary tumors].

Computarized tomography allows proper identification and evaluation of stage in the majority patients with periampullary tumors. However, 30% of peritoneal metastases cannot be seen in image studies. The aim of the present study was to evaluate the role of laparoscopy with laparoscopic ultrasound in the staging process of pancreatic and ampullary tumor.

The beta form of the estrogen receptor is predominantly expressed in the papillary cystic neoplasm of the pancreas.

Introduction: Papillary cystic neoplasm (PCN) of the pancreas is a low-malignancy tumor affecting predominantly young females. Sex steroid hormones have been involved in its development and/or growth. Estrogen receptor (ER) has been scarcely found in this tumor, although there is some evidence suggesting expression of the beta-isoform.

Expression of p53 and proliferation index as prognostic factors in gastrointestinal sarcomas.

Background: Sarcomas arising in the gastrointestinal (GI) tract are rare tumors. Molecular markers could be associated with prognosis in these types of tumors.

Methods: We performed a retrospective analysis of adult patients with sarcomas arising in the GI tract at the National Institute of Medical Sciences in Mexico City and the University of Alabama at Birmingham Hospital.

Polypoid Brenner tumor of the uterus.

Extraovarian Brenner tumors (BT) are very rare. We report such a tumor that was an intracavitary polyp in the uterus of a 63-year-old woman. The differential diagnosis included a pure transitional cell tumor, a mixed mullerian tumor, and a uterine tumor resembling an ovarian sex cord tumor.

Adenomatoid Tumor of the Right Adrenal Gland in a Patient with AIDS.

An autopsy case with an incidentally discovered adenomatoid tumor (AT) arising in the right adrenal gland of a 34-yr-old man with AIDS is presented. The immediate cause of death was disseminated coccidioidomycosis. The affected right adrenal gland was partially substituted by a firm 3.