TASK DEFINITION: Given an abstract of a paper, generate a title for this paper such that conveys the key focus of the paper.
PROBLEM: Abstract: A case of cutaneous malignant melanoma and squamous cell carcinoma arising in psoriatic plaques of a patient with severe, pustular psoriasis is presented. The possible role of therapy in the development, growth, and spread of cutaneous malignancy in this patient and in other reported treated psoriatic patients is reviewed.

SOLUTION: Malignant melanoma and squamous cell carcinoma in a patient treated for severe pustular psoriasis.

PROBLEM: Abstract: By use of an improved density measuring system, we found that the gravimetric density of arterial blood of dogs fluctuates at the same frequency as the spontaneous or mechanical ventilation. Similar density fluctuations were observed in the blood leaving isolated, perfused lobes of dogs that were ventilated cyclicly. Employing an analysis that balanced the erythrocyte and plasma flows through distensible capillaries containing blood with a tube hematocrit lower than the hematocrit in large blood vessels, we derived a relationship to estimate from the density fluctuation the change in pulmonary capillary blood volume (Vc). For mechanical ventilation, the maximum change in density over one ventilation cycle increased from 0.084 +/- 0.01 to 0.47 +/- 0.05 (SE) g/l as the frequency decreased from 29 to 6 cycles/min. These density changes were estimated to be the result of an 1-16% change in Vc. A larger tidal volume for the mechanical ventilation led to a larger density fluctuation. The maximum density change of spontaneous respiration of 6 cycles/min was one-sixth of the mechanical case, indicating a much smaller change in Vc during spontaneous respiration. When the airway flow resistance was increased for spontaneous respiration, larger density fluctuations were observed.

SOLUTION: Ventilatory changes of pulmonary capillary blood volume assessed by arterial density.

PROBLEM: Abstract: Parasitic, bacterial, and viral infections may all be associated with transfusion of whole blood and components, including packed red blood cells, platelets, fresh-frozen plasma, and cryoprecipitate. Proper collection and storage techniques, careful donor selection, and laboratory screening of donor blood for evidence of syphilis, hepatitis B, and human immunodeficiency virus (HIV) infection form the basis for prevention of transfusion-transmitted infections. Viral hepatitis, notably non-A non-B hepatitis, is the most frequent infectious risk of transfusion in the United States today. The risk of HIV infection is very low because of voluntary donor self-deferral and screening of donated blood for evidence of the infection.

SOLUTION:
Current issues in transfusion therapy. 1. Risks of infection.