OBJECTIVETo investigate the loss of heterozygosity (LOH) on chromosomal arms 13q and 14q in nasopharyngeal carcinoma (NPC) using 21 microsatellite polymorphic markers and to study whether there is a correlation between LOH and clinicopathologic parameters and/or Epstein-Barr virus (EBV) infection in NPC.

METHODSSixty cases of NPC were studied using polymerase chain reaction based microsatellite analysis with genescan and genotyping techniques.

RESULTSLOH was detected on 13q in 78% of NPC tumors, high frequency LOH loci (more than 30%) clustered to 13q12.3-q14.3 and 13q32. On chromosome 14q, LOH was detected in 80% of NPC tumors; high frequency LOH loci clustered to 14q11-q13, 14q21-q24 and 14q32. High frequency LOH at 13q31-q32 correlated with a lower level of EBV infection; LOH on chromosome 14q was closely associated with poor differentiation of NPC tumor cells.

CONCLUSIONOur results suggest that in NPC, LOH on chromosome 13q and 14q are common genetic events, and putative tumor suppressor genes (TSG) residing in these regions may be involved in tumorigenesis.

Adult ; Aged ; Chromosomes, Human, Pair 13 ; genetics ; Chromosomes, Human, Pair 14 ; genetics ; DNA, Neoplasm ; genetics ; Female ; Gene Frequency ; Humans ; Loss of Heterozygosity ; Male ; Microsatellite Repeats ; Middle Aged ; Nasopharyngeal Neoplasms ; genetics ; pathology ; Statistics as Topic

Objective Exploring the feasibility and effectiveness of collaborative visits between doctors and nurses in tra-ditional Chinese medicine specialty nursing clinics for spleen and stomach diseases.Methods Using the principle of hospital se-lection to determine the visiting caregiver,and collaborating with specialist physicians to establish a specialized Traditional Chi-nese Medicine specialty nursing clinic for spleen and stomach diseases.By conducting a questionnaire survey on patients who visi-ted the Traditional Chinese Medicine specialty nursing outpatient clinic for spleen and stomach disease in 2023 through medical and nursing collaboration and in 2019 through individual visits by caregivers,we analyzed their satisfaction with medical nursing services.Results Since the implementation of collaborative visits between traditional Chinese medicine specialty nursing clinics for spleen and stomach diseases,the number of nursing clinics has increased from 35 people/month in 2019 to 148 people/month in 2023,and the visit time has been increased from 1 time/week in 2019 to 3 times/week in 2023.The satisfaction level of medi-cal nursing services among patients who received collaborative visits from nursing clinics in 2023 was higher than that of patients who received individual visits from nurses in 2019,and the difference was statistically significant(P＜0.05).Conclusion The implementation of collaborative outpatient visits for traditional Chinese medicine specialty nursing in the spleen and stomach dis-ease specialty has expanded the connotation of traditional Chinese medicine nursing services,met the growing individualized and diversified needs of patients,and improved their satisfaction with medical nursing services.