Association between infection, mismatch repair, HER2 and tumor-infiltrating lymphocytes in gastric cancer.

Background: The influence of () infection and the characteristics of gastric cancer (GC) on tumor-infiltrating lymphocyte (TIL) levels has not been extensively studied. Analysis of infiltrating-immune-cell subtypes as well as survival is necessary to obtain comprehensive information.

Aim: To determine the rates of deficient mismatch-repair (dMMR), HER2-status and infection and their association with TIL levels in GC.

Association between PIK3CA Mutations in Blood and Tumor-Infiltrating Lymphocytes in Peruvian Breast Cancer Patients.

Objective: To evaluate the relationship between circulating tumor DNA (ctDNA) presence and tumor features including tumor-infiltrating lymphocyte (TIL) levels in Peruvian breast cancer patients.

Materials And Methods: This was a prospective study conducted at the Instituto Nacional de Enfemedades Neoplasicas, Peru. We evaluated level of TIL and PIK3CA mutations in ctDNA.

Tumor Protein p53 and K-ras Gene Mutations in Peruvian Patients with Gallbladder Cancer.

Background: Recent studies have shown that genetic alterations are associated with the effect of patient geographic location on gallbladder cancer development. Peru has a high incidence of gallbladder cancer, but causative factors have not yet been identified. We examined the frequency of mutations in TP53 and K-ras genes in Peruvian patients with gallbladder cancer, and compared this with data from Bolivia, Hungary, Chile, and Japan, which have a high gallbladder cancer incidence.

The mortality-incidence ratio as an indicator of five-year cancer survival in metropolitan Lima.

Introduction: The Mortality-Incidence Ratio complement [1 - MIR] is an indicator validated in various populations to estimate five-year cancer survival, but its validity remains unreported in Peru. This study aims to determine if the MIR correlates directly with five-year survival in patients diagnosed with the ten most common types of cancer in metropolitan Lima.

Materials And Methods: The Metropolitan Lima Cancer Registry (RCLM in Spanish) for 2004-2005 was used to determine the number of new cases and the number of deaths of the following cancers: breast, stomach, prostate, thyroid, lung, colon, cervical, and liver cancers, as well as non-Hodgkin's lymphoma and leukaemia.

[Demographic characteristics of human papillomavirus detected by PCR-RFLP in peruvian women].

In order to determine the sociodemographic characteristics of human papillomavirus (HPV) in patients referred to the National Institute of Neoplastic Diseases (INEN) between 2012-2014, the detection of HPV in cervical cells was performed by polymerase chain reaction (PCR). In 465 cervical samples, 151 (32.5%) cases were HPV positive.

Trends in head and neck cancers in Peru between 1987 and 2008: Experience from a large public cancer hospital in Lima.

Background: Few studies have evaluated the trends in head and neck cancer in developing countries. The purpose of this study was to estimate trends in incidence of human papillomavirus-related (HPV-R) and HPV-unrelated (HPV-U) head and neck cancer in Lima, Peru, from 1987 to 2008.

Methods: Registry data from a single public cancer hospital were used to estimate age and sex-specific incidence rates.