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A controversy over the nature of occasionally noted nodules in the testicular hilus in male infants with the adrenogenital syndrome has arisen from several reports.1,2 The difference of opinion is whether they represent Leydig cells 1 or adrenal cells.2 The use of cortical steroids since 1950 in the treatment of this syndrome has yielded much information on the metabolic disorders involved 3 but has not revealed the nature of

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Summary A murine monoclonal antibody PASE/4LJ to prostatic acid phosphatase (PAP) was used to immunostain a wide variety of sections of benign and malignant tissues (654 blocks). Non-neoplastic adult and fetal prostatic glands, primary and metastatic prostatic carcinomas, and scattered cells in prostatic and penile urethra were positive. Rat, dog and rabbit prostates were negative. Nine of 400 tumours of non-prostatic origin showed some positivity: 6/36 carcinoids, 1/9 islet cell tumours, 1/55 ovarian adenocarcinomas (serous) and one carcinosarcoma of the lung (epithelial portion). Positive staining was seen in islet cells in 4/5 specimens of normal pancreas, and in 4/9 blocks of normal pancreas surrounding a pancreatic tumour. Loops of Henle, maculae densae, and distal tubules in 10/10 fetal and 2/9 adult kidneys were also positive, with proximal tubules and collecting ducts negative. All other 159 blocks of non-neoplastic adult and fetal tissues were negative. The antibody was also affinity purified from ascitic fluid, and shown not to inhibit the enzyme activity of prostatic acid phosphatase.

of Vapour-pressures of Alcohols and Organic Acids, and the Relations existing between the Tapour-pressuq-es of the Alcohob and Organic Acids.