Summary Glutathione S-transferase sub-types a, 1t and were assessed by immunocytochemistry in 109 biopsies of ovarian tissue, comprising malignant epithelial tissue in 86 cases and tissue of ovarian origin considered to be normal in 23. Glutathione S-transferase n was the most prevalent, being present in all except one malignant epithelium studied and 83% of non-malignant tissue. There were no significant differences in the overall distribution of positive staining for a, and in the malignant and non-malignant biopsies, although the intensity of staining was greater in the malignant epithelium. Stromal staining was in general more pronounced in the malignant biopsies, and this was particularly prominent in the case of the a sub-type. Positive staining was seen more frequently in the less well-differentiated tumours, and a diffuse cytoplasmic pattern was the most common observation in tumours of moderate and poor differentiation. There was no significant association between survival and the presence or absence of sub-type staining of a and sub-type. For the sub-type at, patient survival was found to correlate with the intensity of staining (on a 0-+ + + scale). Those patients showing resistance to cytotoxic chemotherapy were found to have a higher intensity of staining for GSTi than responding patients.

Summary— Four cases of renal angiomyolipoma are presented in patients with no other stigmata of tuberous sclerosis. The presentation, radiological and pathological features are reviewed.

We conclude that the E-cadherin expression profile in SCSTs can assist in distinguishing between SCSTs and non-SCSTs in which there is no nuclear expression of E-cadherin. The nuclear localization of catenins may be of potential use in distinguishing MCST from other subtypes of SCST.