[Urothelium cancer with trophoblastic differentiation. An unusual case of a 77 year old patient]. / Das Urothelkarzinom mit trophoblastischer Differenzierung. Eine seltene Tumorvariante am Beispiel einer 77-jährigen Patientin.

Urothelium carcinomas with beta HCG positive markers are a rarity in tumour differentiation. Syncytiotrophoblastic and, in a few cases, cytotrophoblastic giant cells are typical for this carcinoma. Such differentiation has an intensified potential for invasiveness and is accompanied by increased angiogenesis. In the present case, the mixture of trophoblastic cells indicates a common stem cell. In comparison with beta HCG negative transitional cell carcinoma, the prognosis is bad for beta HCG positive carcinoma. For this reason, a radical operation should be taken into consideration as early as possible.

Infrared optical absorption loss of antireflection coatings on germanium and potassium chloride substrates at the 10-µm wavelength by the photothermal deflection technique.

The photothermal deflection technique is used to study the infrared absorption of antireflection coatings on Ge and KCl substrates. The thin films deposited by the thermal resistance evaporation technique, both with and without ion-assisted deposition, are investigated. The experimental results show that Ar-ion bombardment with low energy can evidently reduce the absorption of the coatings.