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Two hundred and eighty-four patients with advanced Hodgkin's disease (HD) (stage II with poor prognostic features and stage III/IV) have been treated with the ChlVPP combination chemotherapy regimen (chlorambucil, vinblastine, procarbazine and prednisolone) in a single-centre unselected series. Median follow up is 92 months. Fifty-five patients had previously received radiotherapy but none had received previous chemotherapy. Eighty-five per cent of previously untreated patients and 91% of previously irradiated patients entered complete remission (CR); 71% and 68% of these respectively remain in CR at 10 years and 65% and 64% of each group respectively are alive at 10 years. On univariate analysis, age, stage, site of visceral disease and lymphocyte count predicted survival and on multivariate analysis age, absence of symptoms, absence of lung, liver or bone marrow disease and achieving a CR remained important predictors of survival. Acute toxicity was mild. The 10 year actuarial risk of acute leukaemia was 2.7%. This study adds further support to the view that chlorambucil is as effective and less toxic than mustine in combination chemotherapy for HD. We suggest that MOPP chemotherapy is no longer routinely indicated for HD.

Acyclovir is an effective treatment for herpes simplex and herpes zoster infections, but it is somewhat limited by low oral absorption. 2-amino-9-[(2hydroxyethoxy)methyl]-9H-purine (BW A515U), a new prodrug of acyclovir, when evaluated in 10 patients with haematological malignancies, was well tolerated, excellently absorbed, and produced high plasma concentrations of acyclovir which were comparable to those with intravenous acyclovir. The plasma concentrations after oral BW A515U were much higher than those after oral acyclovir.