To define the natural history of sickle cell anaemia a cord blood screening programme was initiated and during the first 3 years a total of 129 newborns with FS phenotype were detected, of whom 83 infants were followed up regularly. Forty-three of them had attained the ages of between 1 and 3 years and the analysis of their data revealed that in 21 of 43 cohort children (14 FS and 7 FS + Barts) who had almost identically raised levels of haemoglobin F, the clinical manifestations of the disease appeared to be influenced by the size of the RBC, with the microcytic group having a relatively milder clinical course as compared with the normocytics. Similar observations were made in about 50% (47/93) of non-cohort older children and adults with sickle-cell anaemia, suggesting that alpha thalassaemia in combination with increased levels of fetal haemoglobin was probably an important predictor of the clinical severity in patients with sickle-cell anaemia in the Eastern Province of Saudi Arabia.
A questionnaire study of 42 Saudi patients with sickle cell anemia revealed that none of them had ever suffered from priapism. A comparison of hematological parameters between Jamaican priapism patients and Saudi non-priapism patients suggested that high Hb F levels and hypochromic microcytosis in Saudi patients might play an important role in preventing this complication.
A new monoclonal antibody, SM3, against stripped mucin core protein has been evaluated for the radioimmunoscintigraphy of ovarian cancer. It was radiolabelled with In-111, I-123 and Tc-99m and results showed a sensitivity of 95%, 100% and 100% and an accuracy of 73%, 86% and 100% for malignancy; respectively.
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