Congenital central corneal dermoid: A rare entity

Area of Science:

• Ophthalmology
• Developmental Biology
• Histopathology

Background:

• Central corneal dermoids (CD) are rare congenital tumors.
• Understanding the pathogenesis of CD is crucial for diagnosis and treatment.
• This study investigates the origin of CD by comparing its antigenic profile with limbal dermoids (LD) and cadaveric corneas (CC).

Purpose of the Study:

• To elucidate the pathogenesis of central corneal dermoid (CD).
• To compare the antigenic expression profile of CD with limbal dermoid (LD) and cadaveric corneal (CC) specimens.
• To investigate the potential origin of central corneal dermoids.

Main Methods:

• Immuno-histochemical staining was performed on CD, LD, and CC specimens.
• Antigenic markers including Cytokeratin 3, smooth muscle actin (SMA), P63 (limbal stem cell marker), and Vimentin (mesenchymal stem cell marker) were analyzed.
• Histopathological evaluation using Hematoxylin and Eosin staining was conducted on LD.

Main Results:

• Cytokeratin 3 was positive in CC, LD, and CD.
• SMA was positive in LD and CD, but negative in CC.
• P63 was detected only in LD, while Vimentin was positive in all three tissue types.
• LD exhibited typical dermoid morphology with stratified keratinized epithelium and adnexal structures.

Conclusions:

• Corneal dermoids (CD) exhibit a distinct antigenic profile, with a higher prevalence of mesodermal tissue components compared to limbal dermoids (LD).
• This suggests a potentially different origin for central corneal dermoids, possibly involving a distinct developmental pathway.
• Further research is warranted to fully understand the embryogenesis of corneal dermoids.