Résumé
BACKGROUND: Transforming growth factor(TGF-alpha) is a polypeptide which is structurally related to epidermal growth factor(EGF) and binds to the epidermal growth factor receptor(EGFR). TGF-alpha utilizes EGFR to increase the activation of tyrosine kinase to involve in signal transduction of cellular growth. TGF-alpha synthesis occurs in a variety of neoplastic cells. p53 is a tumor-suppressor gene. There is a strong corrleation between immunohistochemical p53 positivity and p53 mutations in lung and laryngeal carcinoma. PCNA is expressed by cycling cells in late G1, S and G2 phase, and may be used to indicate the degree of cellular proliferation. OBJECTIVES: To evaluate whether TGF-alpha, p53 and PCNA can be used as an indicator to malignant transformation of dysplasia in larynx or not. MATERIALS AND METHODS: The authors investigated the TGF-alpha score, p53 immunoreactivity and PCNA proliferating index by immunohistochemical staining in 30 laryngeal dysplasia from 1992 to 1995. RESULTS: Dysplasia with malignant transformation showed values of 5.46 for TGF-alpha, 29.2 for PCNA proliferating index and 37.5 for p53 immunoreactivity. Dysplasia without malignant transformation showed values of 1.88 for TGF-alpha, 8.6 for PCNA proliferating index and 4.5 for p53 immunoreactivity. Conclusions: The results suggest that TGF-alpha, p53 and PCNA could be an useful indicator to predict the progression of laryngeal dysplasia.
Sujets)
Prolifération cellulaire , Facteur de croissance épidermique , Phase G2 , Larynx , Poumon , Antigène nucléaire de prolifération cellulaire , Protein-tyrosine kinases , Transduction du signal , Facteur de croissance transformant alphaRésumé
An autopsy case of spontaneous rupture of urinary bladder followed by longstanding chronic and acute hemorrhagic cystitis associated with anomalous course of the right ureter and pyo-hydronephrosis, and acutely disseminated tuberculous pneumonia in a twenty-two-year-old Korean Army soldier is presented. Pathogenesis of spontaneous rupture of urinary bladder is briefly discussed.
Sujets)
Humains , Autopsie , Cystite , Personnel militaire , Pneumopathie infectieuse , Rupture spontanée , Uretère , Vessie urinaireRésumé
A case of recurrent fibrosarcoma arising from the distal portion of the left spermatic cord in a twenty-two-year-old male is presented, and is discussed on its incidence, differential diagnosis, treatment and prognosis with brief literature review.