ABSTRACT
UNLABELLED: A series of 7 cases of chromophobe cell carcinoma with clinicopathological correlation is studied. The immunohistochemistry analysis was carried out evaluating in all cases: low and high cytoqueratines (AE1, AE3), membrane epithelial antigen (EMA), vimentin, carcinoembrionary antigen (CEA), proliferative cell nuclear antigen (PCNA) and the oncoproteins p53 and focal c-erbB2. In all cases a diffuse positivity for EMA, AE3 and focal for AE1 was observed, while vimentin and CEA were negative. The positivity for PCNA was always less than 25% of tumoral cells. The oncoprotein p53 was in all cases negative and only in one case a mild and focal positivity for c-erbB2 was observed. CONCLUSIONS: 1) The negativity for vimentin and positivity for EMA, AE1 and AE3 allows to differentiate this carcinoma from clear cell carcinoma. This corroborate a distinct histogenesis, thus suggesting their origin in the intercalar cells of distal collector tubules. 2) The low values of PCNA and the negativity for both oncoproteins p53 and c-erbB2 supports the low aggresivity of this tumor and a better prognostic than other types of kidney carcinomas.
Subject(s)
Carcinoma, Renal Cell/pathology , Kidney Neoplasms/pathology , Aged , Female , Humans , Immunohistochemistry , Male , Middle AgedABSTRACT
Sixty-six infants aged 8 days to 3 months presented jaundice as a sign of urinary infection during a ten-year period 1968-1977. The main clinical and biochemical aspects are described. "E.coli" grew in 49 urine cultures (74.2%), but other bacteria were also found ("Klebsiella", "Proteus", "Pseudomonas", "A. aerogenes"). Hepatic function tests seem to prove that intrahepatic colostasis is the main mechanism involved, although hemolysis was also found in some cases. The importance of considering urinary infection in the diagnosis of jaundice during infancy is stressed.
