Document 1196 DOCN M94A1196 TI Severe thrombocytopenia (ST) in HIV-1+ pts. DT 9412 AU Maiello A; Sciandra M; Sinicco A; Inst. Infect. Diseases, Univ. Turin, Italy. SO Int Conf AIDS. 1994 Aug 7-12;10(2):187 (abstract no. PB0763). Unique Identifier : AIDSLINE ICA10/94371379 AB OBJECTIVE: to estimate the prevalence of ST (PTLs < 40,000/microliter) and the risk of developing spontaneous haemorragic manifestations (HM) in HIV1+. METHODS: from Feb. '85 to Oct. '93 we studied all the HIV1+ pts with ST. Pts with HIV1 unrelated ST were excluded from the study. RESULTS: the study gathered 1250 HIV1+ (907 IDUs, 26 homo, 71 hetero, 12 blood recipients; mean age 28.7 +/- 9.4 yr); 52 HIV1+ (5.4%) had a ST (mean PTL value: 21,600 +/- 11,000/microliter). Eleven of 52 pts (21.1%) had at least one HM episode (5 nose bleeding, 3 orthostatic purpura, 2 ulaemorrhagia, 1 petechial lesion and haematuria). Their mean PTL value was 15,000 +/- 8900/microliter), whilst the mean PTL value of non-HM was 22,000 +/- 10,700/microliter (p = NS). Among the study group, the mean CD4+ cell count was 398 +/- 318/microliter. The mean CD4+ cell count in HM was 303 +/- 125/microliter and 408 +/- 125/microliter in non-HM (p = NS). No significant correlation was seen between ST and age, stage of HIV1 infection and progression to AIDS. AZT was given to 19 pts: 7 (36.8%) had persistent PTL increase. Relative risk of HM was 7.9 (95% CL 4.2-14.8) in ST pts with HM. CONCLUSION: our data suggest that severe HM is an infrequent event. AZT is only of partial efficacy. DE Acquired Immunodeficiency Syndrome/*BLOOD/COMPLICATIONS/DRUG THERAPY Adult Female Hemorrhage/*EPIDEMIOLOGY/ETIOLOGY Human HIV Seropositivity/*BLOOD/COMPLICATIONS/DRUG THERAPY *HIV-1 Leukocyte Count Male Retrospective Studies Thrombocytopenia/*COMPLICATIONS T4 Lymphocytes Zidovudine/THERAPEUTIC USE MEETING ABSTRACT SOURCE: National Library of Medicine. NOTICE: This material may be protected by Copyright Law (Title 17, U.S.Code).