Səhifə 1 dan 16 nəticələr
Gonadoblastoma is defined as a neoplasm containing nests of germ cells and cells resembling Sertoli cells or granulosa cells. Gonadoblastomas arise almost exclusively in dysgenetic gonads. They are associated with an increased risk of developing germ cell tumours. Testicular germ cell tumours in
Gonadoblastoma is a rare ovarian neoplasm which belongs to "germ cell-sex cord-stromal tumor" category. This tumor is frequently associated with invasive germ cell malignancy. It commonly arises in dysgenetic gonads of young individuals who are phenotypically females but possess 46XY karyotype. It
The testis-specific protein Y-encoded gene (TSPY) is a tandem repeat gene located at the critical region for the gonadoblastoma locus on Y chromosome that predisposes the dysgenetic gonads of intersex individuals to oncogenesis. The expression and molecular properties of TSPY suggest that it is the
Testicular gonadoblastoma is an uncommon tumor in domestic animals. The current study describes a testicular gonadoblastoma in 2 pet domestic rabbits (Oryctolagus cuniculus domesticus) based on the histomorphological, immunohistochemical, and ultrastructural characteristics of the tumor. The tumor
Gonadoblastomas are rare mixed germ cell neoplasms, which are frequently diagnosed in testes excised for other reasons. In human patients these tumours are usually associated with undescended testes or dysgenetic gonads. This report describes a 10-year-old male dog with mixed gonadal dysgenesis
Gonadoblastomas are neoplasms of dysgenetic gonads which may undergo regression or become overgrown by malignant germ cell tumors (mGCTs). Since little is known about their relationship to normal gonadal development and mGCTs, we studied the phenotype and antigenic profile of gonadoblastomas in
The evolution of the gonads during intra-uterine development has been followed by immunohistochemical demonstration of placental-like alkaline phosphatase (PLAP) at the germ-cell level. PLAP immunopositivity was restricted to the limited period when germ cells were not surrounded by granulosa or
We analyzed the sensitivity of a polyclonal antibody to placental alkaline phosphatase (PLAP) in labelling testicular germ-cell neoplasms, by utilizing the peroxidase-antiperoxidase technique. The immunoreactivity of 89 germ-cell tumors for PLAP was as follows: 98% of cases with seminomatous
OBJECTIVE
The purpose of the study was to define the histological origin of gonadoblastomas, allowing the identification of high-risk patients.
METHODS
Sixty paraffin-embedded gonadectomy or gonadal biopsy samples of 43 patients with gonadal dysgenesis were selected from our archives. We studied the
This concise review summarises tissue and serum markers useful for differential diagnosis of germ cell tumours (GCT), with focus on the most common testicular GCT (TGCT). GCT are characterised by phenotypic heterogeneity due to largely retained embryonic pluripotency and aberrant somatic
Carcinoma in situ (CIS) is the precursor of malignant testicular germ cell tumors (GCTs) of adolescents and young adults, being the neoplastic counterpart of primordial germ cells/gonocytes. Carcinoma in situ cells will develop into invasive seminoma/nonseminoma. Gonadoblastoma (GB) is the precursor
BACKGROUND
Gonadal dysgenesis (GD) is associated with increased risk of gonadal malignancy. Determining a patient's risk and appropriate timing of gonadectomy is challenging, but immunohistochemical markers (IHM) may help establish the diagnosis of malignant germ cell tumors (GCT). Our objective was
In a review of 102 cases with various intersex states, the frequency of intratubular germ cell neoplasia (IGCN) unclassified in testes of children and adolescents was 6%. It was seen in 2 of 87 cases in the prepubertal age group and 4 of 23 cases in the pubertal age group. The frequency of IGCN was
OBJECTIVE
To describe the molecular, cytogenetic, immunohistochemical, and endocrinologic characteristics of a young 46,XY female with persistent müllerian structures and germ cell tumors in dysgenetic gonads.
METHODS
Descriptive case study.
METHODS
Mackay Memorial Hospital and National Yang-Ming
The aim of the study was to identify testicular carcinoma in situ (CIS), a precursor of germ cell tumours (GCT), in patients from the high risk groups, using classic and alternative immunohistochemical methods. 70 patients with 46,XY karyotype were examined. Whole gonads or biopsy specimens were