title: Incidence of Clavicular Rhomboid Fossa in Northeastern Thais: An Anthropological Study.
abstract: The rhomboid fossa of clavicle is used to determine the age and sex in anthropology and forensic sciences. The variant types of rhomboid fossa on inferior surface have been reported in many races except in Thais. This study therefore was aimed at classifying the types of the rhomboid fossa in Northeastern Thais. The identified 476 Northeastern Thais dried clavicles (270 males and 206 females) were observed and recorded for the types of rhomboid fossa. The results showed that Thai-rhomboid fossa could be classified into 4 types: Type 1: smooth; Type 2: flat; Type 3: elevated; and Type 4: depressed, respectively. The incidences of rhomboid fossa were as follows: Type 1: 0.21%; Type 2: 19.75%; Type 3: 76.26%; and Type 4: 3.78%, respectively. Additionally, it was found that the percentage of Type 4 (11.84%) was much greater than that of female (1.94%) compared to other types. This incidence of rhomboid fossa types especially Type 4 may be a basic knowledge to be used in sex identification. The high incidence of rhomboid fossa in both sexes of Northeastern Thai clavicles was Type 3 (elevated type).
authors.affiliation: Department of Anatomy, Faculty of Medicine, Khon Kaen University, Mitraparp Road, Khon Kaen, Thailand.
authors.forename: Ailadda
authors.identifier: 0000-0002-6093-3262
authors.initials: A
authors.lastname: Kaewma
authors.affiliation: Department of Anatomy, Faculty of Medicine, Khon Kaen University, Mitraparp Road, Khon Kaen, Thailand.
authors.forename: Apichakan
authors.initials: A
authors.lastname: Sampannang
authors.affiliation: Department of Anatomy, Faculty of Medicine, Khon Kaen University, Mitraparp Road, Khon Kaen, Thailand.
authors.forename: Panya
authors.initials: P
authors.lastname: Tuamsuk
authors.affiliation: Department of Radiology, Faculty of Medicine, Khon Kaen University, Mitraparp Road, Khon Kaen, Thailand.
authors.forename: Jaturat
authors.initials: J
authors.lastname: Kanpittaya
authors.affiliation: Department of Anatomy, Faculty of Medicine, Khon Kaen University, Mitraparp Road, Khon Kaen, Thailand; Center for Research and Development of Herbal Product, Faculty of Pharmaceutical Science, Khon Kaen University, Khon Kaen, Thailand.
authors.forename: Sitthichai
authors.identifier: 0000-0002-6793-2879
authors.initials: S
authors.lastname: Iamsaard