A.I.  Udoaka, B.C.  Didia, 
    Prevalence and Types of Accessory Ossicles and Sesamoid Bones of the Feet of Adult Southern Nigerians,
    Research Journal of Medical Sciences,
    Volume 7,Issue 1,
    2013,
    Pages 25-27,
    ISSN 1815-9346,
    rjmsci.2013.25.27,
    (https://makhillpublications.co/view-article.php?doi=rjmsci.2013.25.27)
    Abstract: The prevalence and types of sesamoid bones in the feet of 
  adult Southern Nigerians was studied. Most accessory ossicles and sesamoid bones 
  of the ankle and feet remain asymptomatic but can cause painful symptoms and 
  as a result there has been an increase interest in their study. Sesamoids are 
  small rounded masses of bony tissue embedded in certain tendons and ligaments 
  usually related to joint surfaces. A total of 520 normal radiographs of adult 
  Southern Nigerians 314 males and 206 females were utilized in the region. The 
  result showed 81% of the total population with two sesamoids bones at the metatarsophalangeal 
  joint of the hallux others were 10% Os perineum, 2.5% Os trigonum, 0.5% of Os 
  vesalianum and 0.3% Os tibiale extrernum. Only 5% of the population did not 
  have any sesamoid bones. This study presents the variability of the sesamoid 
  bones in the feet of the Southern Nigerians.
    Keywords: Sesamoids;Os vesalianum;Os perineum;metatarsophalangeal;hallux;Os trigonum