title: Primary intraosseous squamous cell carcinoma arising in dentigerous cyst: Report of 2 cases and review of the literature.
abstract: Dentigerous cysts are one of the most common odontogenic cysts of the oral cavity. Odontogenic cysts can give rise to a variety of neoplasms. Carcinoma arising in a dentigerous cyst is extremely rare, with a review of literature showing near 30 cases. The present report describes 2 cases of primary intraosseous squamous cell carcinoma originated from a dentigerous cyst. The first one refers to a 57-year old female with a persistent lesion in the left retromolarregion and diagnosed with squamous cell carcinoma originated fromthe incomplete excision of the lower third molar follicle during its surgical extraction. The second case describes the case of an 18-year old male with an impacted upper canine with previous history of infection and swelling of the oral cavity. The histopathological study revealed the malignization of the follicle surrounding the dental crown. These two cases confirmed the importance of the histopathological study of all the tissue samples obtained from surgical procedures. Although the development of a malignant lesion from a dentigerous cyst is rare and its clinical-radiological features are apparently innocuous, this entity should be considered as a differential diagnosis.
  
  
  BACKGROUND
  Dentigerous cyst, odontogenic cyst, squamous cell carcinoma, primary intraosseous squamous cell carcinoma, odontogenic carcinoma.
authors.affiliation: MD, DDS, MS, PhD. Chairman and Professor of Oral and Maxillofacial Surgery. Faculty of Dentistry - University of Barcelona. Director of the Master of Oral Surgery and Implantology (EFHRE International University/FUCSO). Coordinating investigator of the IDIBELL institute. Head of the Department of Oral and Maxillofacial Surgery and Implantology, and Director of the TMJ Disease and Orofacial Pain Unit. Teknon Medical Center. Barcelona, Spain.
authors.forename: Cosme
authors.initials: C
authors.lastname: Gay-Escoda
authors.affiliation: DDS. Fellow of the Master degree program in Oral Surgery and Implantology. Faculty of Dentistry - University of Barcelona.
authors.forename: Octavi
authors.initials: O
authors.lastname: Camps-Font
authors.affiliation: DDS, MS. Master degree program in Oral Surgery and Implantology. Faculty of Dentistry - University of Barcelona.
authors.forename: Marta
authors.initials: M
authors.lastname: López-Ramírez
authors.affiliation: MD. Specialist in Clinical Pathological Anatomy. Associate Professor of Experimental Clinical Pathology and Terapeutics. School of Dentistry of the University of Barcelona. Researcher of the IDIBELL Institute. Barcelona, Spain.
authors.forename: August
authors.initials: A
authors.lastname: Vidal-Bel