Ectopic Preauricular Sinus in a Facial Cleft and Microtia Patient

Abstract

Preauricular sinus is a congenital malformation that is very commonly encountered among the general population and it has especially high prevalence among Asians when compared to other ethnic groups. It can often go unnoticed or easily overlooked by the patient or even by doctors because most of them are asymptomatic and is most of the time only a tiny pit that can be trivial in terms of aesthetics. We report a very rare and unique case that has no precedence what so ever; hence no reported case in the literature: an ectopic preauricular sinus in a facial cleft and microsomia patient.

Cervical chondrocutaneous remnant: a case report

“…One suggests that cervical lesions with a cartilage core are ectopic auricular tissues. An accessory tragus also results from the failed fusion of the hillocks of the first and second branchial arches, and indeed, it occurs anywhere on the migration track of the head and neck [9][10][11]. Therefore, cervical chondrocuta- neous branchial remnants are often confused with cervical accessory tragus [12,13].…”

Ectopic Unilateral Ear Pit in an Otherwise Well-Appearing Child: A Case Report and Literature Review

“…Ear pits are a common congenital malformation and can occur either sporadically or hereditarily [2,4,7]. The incidence varies globally and is estimated to be 0.1-0.9% in the United States, occurring in 10% of Asian-American, 5% of African-American, and 1% of Caucasian-American children [2][3][4][5][6].…”

“…Both sexes are equally affected [8]. They are unilateral in over 50% of cases, more often on the right ear, and bilateral in 25-50% of cases [2][3][4][5][6][7].…”

“…The embryogenesis of ear pits is not yet known. From the sixth week of gestation, tissue from the first and second branchial clefts develops into six auditory hillocks (known as the hillocks of His; three from the caudal edge of the first branchial cleft and three from the cephalic edge of the second branchial cleft), which unite to form the external ear within the next few weeks of embryogenesis (Figure 3) [2][3][4][5][6][7][8][9][11][12][13][14][15]. Currently, there are three theories for the development of ear pits: incomplete fusion of the first three auditory hillocks from the first branchial cleft, isolation of ectodermal folds during auricle formation, and defective closure of The inner surface of ear pits consists of stratified squamous epithelium [3,13].…”

“…Ear pits are usually isolated and asymptomatic. However, pits can be superficial or have tracts that can vary in length, branch, and follow a tortuous course [4][5][6][7][8][9][10]. This can result in the formation of a cyst that can get infected or an abscess.…”