A histotechnologist, known as a HLT, is part of a medical laboratory team that works with human, animal or plant specimens to diagnosis disease and abnormalities. Their main function is to prepare tissue samples for analysis. This is a complex process and involves putting the specimen through a variety of preparatory steps. These steps include staining, processing, trimming, and other techniques that require a specific skill set. To achieve accurate testing, the HLT must have the skills and training to perform complex scientific testing. The HLT may also do some analysis on his or her own.