Lacrimal caruncle
Lacrimal caruncle | |
---|---|
Details | |
System | eye |
Identifiers | |
Latin | Caruncula lacrimalis |
TA98 | A15.2.07.049 |
TA2 | 6844 |
FMA | 77672 |
Anatomical terminology |
The lacrimal caruncle, or caruncula lacrimalis, is the small, pink, globular nodule at the inner corner (the medial canthus) of the eye.[1] It consists of tissue types of neighbouring eye structures. It may suffer from lesions and allergic inflammation.
Structure[]
The lacrimal caruncle is found at the medial canthus of the eye.[1] It consists of skin, hair follicles, sebaceous glands, sweat glands, accessory lacrimal tissue and other tissues that are present in the skin and accessory lacrimal glands.[1][2] Its non-keratinized epithelium resembles the conjunctival epithelium.[2]
Clinical significance[]
Lesions[]
The lacrimal caruncle may have a lesion.[3] This can have any one of a number of causes, which may be difficult to diagnose.[3] Cancer is a rare cause.[3][4] These lesions include papillomas and oncocytomas.[4]
Allergies[]
With ocular allergies, the lacrimal caruncle and the plica semilunaris of the conjunctiva may be inflamed and pruritic (itchy) due to histamine release in the tissue and tear film.
References[]
- ^ a b c Okumura, Yuta; Takai, Yoshiko; Yasuda, Shunsuke; Terasaki, Hiroko (2017). "Bilateral lacrimal caruncle lesions". Nagoya Journal of Medical Science. 79 (1): 85–90. doi:10.18999/nagjms.79.1.85. ISSN 0027-7622. PMC 5346624. PMID 28303065.
- ^ a b Miura-Karasawa, Maria; Toshida, Hiroshi; Ohta, Toshihiko; Murakami, Akira (27 April 2018). "Papilloma and sebaceous gland hyperplasia of the lacrimal caruncle: a case report". International Medical Case Reports Journal. 11: 91–95. doi:10.2147/IMCRJ.S162528. PMC 5927183. PMID 29731668.
- ^ a b c Santos, Arturo; Gómez-Leal, Alfredo (1994-05-01). "Lesions of the Lacrimal Caruncle: Clinicopathologic Features". Ophthalmology. 101 (5): 943–949. doi:10.1016/S0161-6420(94)31233-4. ISSN 0161-6420.
- ^ a b Kapil, Jyoti P.; Proia, Alan D.; Puri, Puja Kumari (May 2011). "Lesions of the Lacrimal Caruncle With an Emphasis on Oncocytoma". The American Journal of Dermatopathology. 33 (3): 227–235. doi:10.1097/DAD.0b013e3181d9b56d. ISSN 0193-1091.
Additional images[]
Extrinsic eye muscle. Nerves of orbita. Deep dissection
Small white lesion on lacrimal caruncle, most likely a cyst
- Human eye anatomy
- Anatomy stubs