The cystic structures contain laminated keratin, indicating infundibular differentiation.
Ching-Yu Huang, Yu-Hung Wu 2010, 'Panfolliculoma: report of two cases', Dermatologica Sinicahttp://www.sciencedirect.com/science/article/pii/S1027811710600158. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
All studied animals had intraepithelial cysts mainly in the infundibular and ampullary regions.
G.R. Valle, E.F. Nascimento, A.C.S. Castro, A.L. Norte, J.C. Nogueira 2005, 'Análise histológica e histoquímica de cistos intra-epiteliais de tubas uterinas denovilhas mestiças Histological and histochemical analysis of intraepithelial cystsof the uterine tubes of crossbred heifers', Arquivo Brasileiro de Medicina Veterinária e Zootecniahttp://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352005000300009. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
We report a case of hybrid cyst with infundibular, isthmic, and pilomatrical differentiation.
Yun-Seok Choi, Sung-Kee Min, Hyung Sup Shim, Min-Cheol Kim, Jin-Soo Lim, Ki-Taik Han 2012, 'Follicular hybrid cyst on the cheek: A combination of infundibular, isthmic, and pilomatricaldifferentiation', Indian Journal of Pathology and Microbiologyhttp://www.ijpmonline.org/article.asp?issn=0377-4929;year=2012;volume=55;issue=4;spage=563;epage=565;aulast=Choi. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Epidermal cysts have an epithelial wall containing a granular layer with lamellar keratinization, indicating an infundibular origin.
Gürkan Kaya, Jean-Hilaire Saurat 2018, 'Cutaneous Adnexal Cysts Revisited: What We Know and What We Think We Know', Dermatopathologyhttps://www.karger.com/Article/FullText/488585. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
These developmental lesions could later be affected by (acquired) infundibular caries once occlusally exposed due to normal wear.
Apryle Horbal, Sionagh Smith, Padraic M. Dixon 2019, 'A Computed Tomographic (CT) and Pathological Study of Equine Cheek Teeth InfundibulaeExtracted From Asymptomatic Horses. Part 1: Prevalence, Type and Location of InfundibularLesions on CT Imaging', Frontiers in Veterinary Sciencehttps://www.frontiersin.org/article/10.3389/fvets.2019.00124/full. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Subocclusal developmental infundibular lesions, including cemental hypoplasia andcaries, were present in 72% of infundibulae without occlusal caries.
Apryle Horbal, Sionagh Smith, Padraic M. Dixon 2019, 'A Computed Tomographic (CT) and Pathological Study of Equine Cheek Teeth InfundibulaeExtracted From Asymptomatic Horses. Part 1: Prevalence, Type and Location of InfundibularLesions on CT Imaging', Frontiers in Veterinary Sciencehttps://www.frontiersin.org/article/10.3389/fvets.2019.00124/full. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)