Malignant testicular germ cell tumors （TGCT） are the most frequent cancers in Caucasian males （20-40 years） with an 70% increasing incidence the last 20 years, probably due to combined action of （epi）genetic and...Malignant testicular germ cell tumors （TGCT） are the most frequent cancers in Caucasian males （20-40 years） with an 70% increasing incidence the last 20 years, probably due to combined action of （epi）genetic and （micro）environmental factors. It is expected that TGCT have carcinoma in situ （CIS） as their common precursor, originating from an embryonic germ cell blocked in its maturation process. The overall cure rate of TGCT is more than 90%, however, men surviving TGCT can present long-term side effects of systemic cancer treatment. In contrast, men diagnosed and treated for CIS only continue to live without these long-term side effects. Therefore, early detection of CIS has great health benefits, which will require an informative screening method. This review described the etiology and early pathogenesis of TGCT, as well as the possibilities of early detection and future potential of screening men at risk for TGCT. For screening, a well-defined risk profile based on both genetic and environmental risk factors is needed. Since 2009, several genome wide association studies （GWAS） have been published, reporting on single-nucleotide polymorphisms （SNPs） with significant associations in or near the genes KITLG, SPRY4, BAK1, DMRT1, TERT, ATF71P, HPGDS, MAD1L1, RFWD3, TEX14, and PPMIE, likely to be related to TGCT development. Prenatal, perinatal, and postnatal environmental factors also influence the onset of CIS. A noninvasive early detection method for CIS would be highly beneficial in a clinical setting, for which specific miRNA detection in semen seems to be very promising. Further research is needed to develop a well-defined TGCT risk profile, based on gene-environment interactions, combined with noninvasive detection method for CIS.展开更多
To the Editor： A 55-year-old homosexual man presented with complaints of right axillary redness for one week. He has been sexually active with a male partner during his travel to South China in hot weather about a mo...To the Editor： A 55-year-old homosexual man presented with complaints of right axillary redness for one week. He has been sexually active with a male partner during his travel to South China in hot weather about a month ago. Physical examination revealed redness in his right axillary area, which stained his white clothing [Figure 1 a]. A lot of mobile Pthirus pubis insects were visible on his axillary hair in the affected area [Figure 1 b and 1 c].展开更多
文摘Malignant testicular germ cell tumors （TGCT） are the most frequent cancers in Caucasian males （20-40 years） with an 70% increasing incidence the last 20 years, probably due to combined action of （epi）genetic and （micro）environmental factors. It is expected that TGCT have carcinoma in situ （CIS） as their common precursor, originating from an embryonic germ cell blocked in its maturation process. The overall cure rate of TGCT is more than 90%, however, men surviving TGCT can present long-term side effects of systemic cancer treatment. In contrast, men diagnosed and treated for CIS only continue to live without these long-term side effects. Therefore, early detection of CIS has great health benefits, which will require an informative screening method. This review described the etiology and early pathogenesis of TGCT, as well as the possibilities of early detection and future potential of screening men at risk for TGCT. For screening, a well-defined risk profile based on both genetic and environmental risk factors is needed. Since 2009, several genome wide association studies （GWAS） have been published, reporting on single-nucleotide polymorphisms （SNPs） with significant associations in or near the genes KITLG, SPRY4, BAK1, DMRT1, TERT, ATF71P, HPGDS, MAD1L1, RFWD3, TEX14, and PPMIE, likely to be related to TGCT development. Prenatal, perinatal, and postnatal environmental factors also influence the onset of CIS. A noninvasive early detection method for CIS would be highly beneficial in a clinical setting, for which specific miRNA detection in semen seems to be very promising. Further research is needed to develop a well-defined TGCT risk profile, based on gene-environment interactions, combined with noninvasive detection method for CIS.
文摘To the Editor： A 55-year-old homosexual man presented with complaints of right axillary redness for one week. He has been sexually active with a male partner during his travel to South China in hot weather about a month ago. Physical examination revealed redness in his right axillary area, which stained his white clothing [Figure 1 a]. A lot of mobile Pthirus pubis insects were visible on his axillary hair in the affected area [Figure 1 b and 1 c].
