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PubMed1991

[Cystosarcoma phyllodes].

A rare case of mammary neoplasia is described. Its morphological and cytologic features are ascribed to cystosarcoma phylloides. It's a rare neoplasia since it represents only the 0.3-0.9% of mammary tumors. At present about one thousand of case have been described in literature. Because of its unforeseeable behaviour, cystosarcoma phylloides requires treatment and follow-up different from mammary carcinoma and fibroadenomas. The treatment is surgical only; the choice between an extensive exeresis and a complete mastectomy is related to tumor dimensions.

Breast Neoplasms↗

PubMed1979

Identification of polycyclic aromatic hydrocarbons in carbon black with reference to cancerogenic risk in tire production.

Carbon blacks used in tire production have been examined for their polycyclic aromatic hydrocarbons (P.A.H.) content. The analytical procedures commonly adopted are discussed. The results obtained show that, A benzene extraction time of 250 hours is necessary to obtain complete extraction, but for practical purposes, an extraction time of 150 hours is sufficient to extract more than 95% of the PAH. It is possible to identify two classes of blacks in regard to extractables. The one class provides extractables in the range of 200--400 micrograms/g; the second class, in the range of 1000--2000 micrograms/g. No P.A.H. were detected by direct injection of carbon black into the mass spectrograph at 200 degrees C, 10(-6) torr. This was probably due to the very strong bonding to the black particles. The P.A.H. contribute a relative constant percentage of the benzene extracts. It is reasonably possible to exclude any carcinogenic risk to personnel, in a working environment, with an airborne carbon black concentration equal to or less than 3.5 mg/m3, due to the very low P.A.H. content of carbon black and to the very strong P.A.H. bonding to the black particles.

Carbon↗