Larva migrans cutânea é uma doença muito comum em regiões tropicais. Na mucosa oral, a infecção ocorre da mesma forma como na pele, mas é raro. Este relato descreve dois casos de Larva migrans na mucosa oral. O primeiro caso foi de uma mulher de 27 anos de idade, que apresentou uma placa eritematosa localizada na mucosa julgal, estendendo-se posteriormente, em conformação linear, para outras áreas da boca. Após biópsia incisional da porção mais anterior da lesão, detalhes morfológicos obtidos em múltiplos cortes examinados sugeriram Necator ou larvas de Ancylostoma braziliense como a causa da infecção. O segundo caso foi de um homem de 35 anos de idade que apresentou uma placa fusiformes eritematosas na mucosa palatina. Esta área foi removida e submetida a exame microscópico, com diagnóstico presuntivo de "estomatite migratória por parasita". As características histológicas foram sugestivas de trajeto de larva. Em ambos os casos a lesão desapareceu após a biópsia e os pacientes estavam assintomáticos.

Cutaneous Larva migrans is a very common disease in tropical regions. In the oral mucosa, the infection occurs in the same way as in the skin, but it is rarer. This report describes two cases of Larva migrans in the oral mucosa. The first case was in a 27-year-old woman who presented an erythematous plaque located on the buccal mucosa, extending to a posterior direction, following a linear pattern, to other areas of the mouth. After incisional biopsy of the anterior-most portion of the lesion, morphological details obtained in multiple examined sections suggested Necator or Ancylostoma braziliense larvae as the cause of infection. The second case was in a 35-year-old male who presented a fusiform erythematous plaque in the palatal mucosa. This area was removed and submitted to microscopic examination under a presumptive diagnosis of "parasite migratory stomatitis". The histological characteristics were suggestive of a larva pathway. In both cases the lesion disappeared after biopsy and the patients were symptom-free.

The established importance of Forensic Dentistry for human identification, mainly when there is little remaining material to perform such identification (e.g., in fires, explosions, decomposing bodies or skeletonized bodies), has led dentists working with forensic investigation to become more familiar with the new molecular biology techniques. The currently available DNA tests have high reliability and are accepted as legal proofs in courts. This article presents a literature review referring to the main studies on Forensic Dentistry that involve the use of DNA for human identification, and makes an overview of the evolution of this technology in the last years, highlighting the importance of molecular biology in forensic sciences.