RESUMO O tumor triquilemal proliferante é uma lesão com diferenciação triquilemal, mais frequente em mulheres idosas; acomete o couro cabeludo, com tamanho variando de 2 cm a 10 cm. Microscopicamente, é sólido-cístico, bem delimitado, comprometendo a derme e o tecido celular subcutâneo. Apresenta ceratinização triquilemal e escamosa. Pleomorfismo pode estar presente. Células fantasmas, apócrinas e fusiformes podem ser observadas. O diagnóstico diferencial deve ser feito com o tumor triquilemal maligno e o carcinoma de células escamosas. O seu comportamento é benigno, sendo recomendada a ressecção completa. Nosso objetivo é relatar um caso de tumor triquilemal proliferante.

ABSTRACT The proliferating trichilemmal tumor is a lesion with trichilemmal differentiation, more common occurring among elderly women; it affects the scalp with sizes ranging from 2-10 cm. Microscopically, it is solid-cystic, well-defined, affecting the dermis and the subcutaneous cellular tissue. It presents trichilemmal and squamous keratinization. Pleomorphism may be present. Ghosts, apocrine and spindle cells can be observed. The differential diagnosis should be performed with malignant trichilemmal tumor and squamous cell carcinoma. Their behavior is benign and complete resection is recommended. Our goal is to report a case of proliferating trichilemmal tumor.

<p>Enzymatic kinetic resolution (EKR) of (±)-cyanohydrins was performed by using immobilized lipase from <italic>Candida antarctica</italic> (CALB) under conventional ordinary conditions (orbital shaking) and under microwave radiation (MW). The use of microwave radiation contributed very expressively on the reduction of the reaction time from 24 to 2 h. Most importantly, high selectivity (up to 92% <italic>ee</italic>_p) as well as conversion was achieved under MW radiation (50-56%).</p>