Preauricular Lymph Node

Cymba conchae Helix Concha

Antihelix p Antitragus

Auricular Hillocks

Figure 16.10 A. Lateral view of the head of an embryo showing the six auricular hillocks surrounding the dorsal end of the first pharyngeal cleft. B to D. Fusion and progressive development of the hillocks into the adult auricle. E. The six auricular hillocks from the first and second pharyngeal arches. H, heart; NP, nasal placode. F. The hillocks becoming more defined. Note the position of the ears with respect to the mouth and eyes (e). G. External ear nearly complete. Growth of the mandible and neck region places the ears in their permanent position.

Figure 16.10 A. Lateral view of the head of an embryo showing the six auricular hillocks surrounding the dorsal end of the first pharyngeal cleft. B to D. Fusion and progressive development of the hillocks into the adult auricle. E. The six auricular hillocks from the first and second pharyngeal arches. H, heart; NP, nasal placode. F. The hillocks becoming more defined. Note the position of the ears with respect to the mouth and eyes (e). G. External ear nearly complete. Growth of the mandible and neck region places the ears in their permanent position.

Preauricular Tag
Figure 16.11 A. Microtia with preauricular pit (arrow). B. Preauricular pits (arrows). C and D. Preauricular appendages (skin tags). Note the low position of the tag in D.

Preauricular appendages and pits (Fig. 16.11) are skin tags and shallow depressions, respectively, anterior to the ear. Pits may indicate abnormal development of the auricular hillocks, whereas appendages may be due to accessory hillocks. Like other external ear defects, both are associated with other malformations.

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Responses

  • Sinit
    Can ear pits be very shallow?
    4 years ago

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