c-Maf expression in angioimmunoblastic T-cell lymphoma reflects follicular helper T-cell derivation rather than oncogenesis
Bisig, Bettina ; Thielen, Caroline ; HERENS, Christian et al
in Histopathology (2012), 60(2), 371-376Detailed reference viewed: 57 (10 ULg)
Expression of the helicase-like transcription factor and its variants during carcinogenesis of the uterine cervix: implications for tumour progression.
; ; et al
in Histopathology (2011), 58(6), 984-8Detailed reference viewed: 12 (3 ULg)
Characterization of hepatitis C virus-induced nasal mucosa remodelling.
El Shazly, Amr ; ; Roncarati, Patrick et al
in Histopathology (2010), 57(3), 488-92Detailed reference viewed: 21 (4 ULg)
High frequency of RASSF1A and RARb2 gene promoter methylation in morphologically normal endometrium adjacent to endometrioid adenocarinoma
; Kridelka, Frédéric ; Mathias, Valérie et al
in Histopathology (2008), 53(5), 525-532
Aims: To identify a DNA methylation signature of endometrioid carcinoma of the endometrium (EEC) in the early stages of endometrial carcinogenesis. <br />Methods and results: Archival biopsy specimens of ... [more ▼]
Aims: To identify a DNA methylation signature of endometrioid carcinoma of the endometrium (EEC) in the early stages of endometrial carcinogenesis. <br />Methods and results: Archival biopsy specimens of 39 EECs, 14 cases of atypical hyperplasia (AH), 11 histologically normal endometrial tissues adjacent to EECs and 24 normal control endometrial samples were retrieved. The cases were tested by quantitative methylation-specific polymerase chain reaction with primers hybridizing in the promoter regions of five genes frequently methylated in human cancer (RASSF1A, RARb2, P16, MGMT and GSTPi). Twenty-nine of 39 (74%) EECs and 7/14 (50%) AHs were methylated for the RASSF1A gene, whereas 17/39 (44%) EECs and 6/14 (43%) AHs were positive for the methylation of the RARb2 gene. No significant results were obtained for the other genes (P16, MGMT and GSTPi). Interestingly, 4/11 (36%) and 6/11 (55%) histologically normal endometrial tissues adjacent to EEC showed, respectively, RASSF1A and RARb2 gene methylation. Furthermore, these 11 specimens were microsatellite stable and showed similar proliferative, cell cycle and apoptotic mean labelling indices as the normal endometrial control tissues. <br />Conclusions: Promoter region methylation of RASSF1A and RARb2 genes is an early event in endometrial carcinogenesis. [less ▲]Detailed reference viewed: 88 (11 ULg)
Endothelium in aneurysmal bone cyst.
; ; et al
in Histopathology (1985), 9(4), 381-7
The surface of the large cystic spaces and dilated blood vessels in seven cases of aneurysmal bone cysts was studied. The endothelium of the blood vessels was surrounded by a layer of collagen types IV ... [more ▼]
The surface of the large cystic spaces and dilated blood vessels in seven cases of aneurysmal bone cysts was studied. The endothelium of the blood vessels was surrounded by a layer of collagen types IV and V, and the endothelial cells contained factor VIII related antigen demonstrated by the peroxidase anti-peroxidase technique. Some blood vessels were dilated resembling small aneurysmal spaces. The visible surfaces of the aneurysmal spaces were devoid of collagen types IV and V, and of factor VIII related antigen. Ultrastructural analysis of paraffin embedded sections did not show the characteristic fine structural features of endothelium covering the aneurysmal spaces. It is concluded that the large spaces in aneurysmal bone cysts are devoid of basement membranes and endothelial cells. The absence of endothelium may explain the abundance of haemorrhages in these lesions. Immunocytochemical demonstration of endothelial antigen provides a valuable tool for the differential diagnosis between aneurysmal bone cysts and vascular tumours. [less ▲]Detailed reference viewed: 3 (0 ULg)