objective: it is hypothesized that stem cells have the capability to form tumors after transplantation. spermatogonial stem cells have proliferation potency and colonization ability related to express pluripotency genes such as c-myc. the primary aim of this study is to investigate tumorigenicity ability of these cells after in vitro cultivation and inoculation in athymic animals. methods: sper...

Teratoma is a type of multipotential cell tumor, which includes a mixture of two or three germinal layers of ectodermis, endodermis, and mesodermis. Although neonatal sacrococcygeal teratoma has been frequently reported, its occurrence in older age is not common. In this study, we report a rare case of spinal intradural mature cystic teratoma in a 16-year-old male, emphasizing on considering th...

Neonatally thymectomized rats of two strains inoculated with SV40 developed more tumors after a shorter latent period than control rats. About 17% of CBA mice thymectomized at 3 weeks of age devek>i>edtumors after room infection with polyoma virus. No significant difference was found between the incidence of skin tumors of neonataliy thymectomized and control rats treated with 7,12-djmethylbcnz...

BACKGROUND The peak incidence of central nervous system (CNS) tumors in childhood indicates that intrauterine or neonatal characteristics are potential risk factors or symptoms of early onset of disease. METHODS We conducted a registry-based case-control study nested in the childhood populations of Denmark, Finland, Sweden, and Norway on the association between indicators of fetal growth and ...

cardiac rhabdomyomas are the most common primary cardiac tumors in children. these tumors are generally asymptomatic, although they may be associated with neonatal tuberous sclerosis complex. despite the fact that thyroid dysfunction rarely occurs in tuberous sclerosis, papillary adenomas (hamartomas) of the thyroid gland have been reported in a number of autopsies. herein, we present the case ...

Cardiac rhabdomyomas are the most common primary cardiac tumors in children. These tumors are generally asymptomatic, although they may be associated with neonatal tuberous sclerosis complex. Despite the fact that thyroid dysfunction rarely occurs in tuberous sclerosis, papillary adenomas (hamartomas) of the thyroid gland have been reported in a number of autopsies. Herein, we present the case ...

Neonatal tumors comprise less than two percent of childhood malignancies. Most are solid tumors, most common histologies being teratoma and neuroblastoma. We encountered a child who was detected to have a right arm mass on antenatal sonogram, which was diagnosed to be a primitive neuroectodermal tumor involving the triceps on fine needle aspiration cytology performed in the post-natal period. T...

Neonatal infravesical obstruction in females is less common than in boys and rarely reported. In this article, we report on 3 cases of infravesical obstruction in female neonates with different etiologies. We also reviewed the literature on this topic. Including our cases, 17 cases of neonatal infravesical obstruction in girls have been reported. Neonatal infravesical obstruction in females has...