Heller’s Median Nail Dystrophy

Bệnh loạn dưỡng móng tay Heller Medial đã được phân tích

Heller – The first case of a paramedian ridge or split and canal formation in nail plate of one or both the thumbnails was recorded by Heller in 1928

Trung vị – Middle, Center, Midpoint, etc.

Móng tay –  The hard, anatomical structure of bound cells protecting the distal phalanx, the nail plate

Bệnh teo cơ – Destruction of tissue 

Heller’s Median Nail Dystrophy (also known as “solenonychia”) is a rare entity characterized by a midline or a paramedian ridge in the nail plate of either thumb. It is usually an acquired condition resulting from a temporary defect in the nail matrix that interferes with nail formation. A single cause for HMND is not known but it usually occurs from:
-rối loạn sừng hóa (sự sừng hóa bất thường xảy ra sớm trong các tế bào riêng lẻ hoặc nhóm tế bào bên dưới lớp hạt), hoặc
-a focal infection (a localized or general infection caused by the dissemination of microorganisms or toxic products from a focus of infection) somewhere between the proximal nail fold and the nail matrix, or
-self-inflicted trauma to the nail or the nail bed.

Put simply: A Heller’s Median Nail Dystrophy is a tear in the nail plate, first visible at the proximal nail fold that in time looks like an upside-down Christmas tree that starts out of view, possibly because of nail unit trauma or infection.

Heller’s Median Nail Dystrophy occurs in the thumbnail unit, often first on the dominant hand.

Recovery of a Heller’s Median Nail Dystrophy is tedious and long, and, although it is not proven that a Heller’s Median Nail Dystrophy is a condition that can be inherited, it is noted in the medical literature that, once it has occurred, recurrence is much more likely.

Trong các tạp chí y khoa trước đây, đôi khi nó bị nhầm lẫn với các mảng móng do thói quen thực sự có chứng loạn dưỡng giữa. Tuy nhiên, trên lâm sàng, điều này đã được chứng minh là khác về bản chất so với HMND.

Tài liệu tham khảo:

• Hoy NY, Leung AK, Metelitsa AI, Adams S. New concepts in median nail dystrophy, onychomycosis, and hand, foot, and mouth disease nail pathology. ISRN Dermatol. 2012;2012:680163. doi:10.5402/2012/680163. Journal
• Kota R, Pilani A, Nair PA. Thoái hóa móng giữa liên quan đến móng tay cái. Indian J Dermatol. 2016;61(1):120. doi:10.4103/0019-5154.174092. PubMed Central
• Mooney E, Mahar P, Howard A. Kênh giữa và thói quen deformity of the nail: is there an association with macrolunulae?. Australas J Dermatol. 2016;57(4):319–20. doi:10.1111/ajd.12377. PubMed
• Pathania V. Median canaliform dystrophy of Heller occurring on thumb and great toe nails. Med J Armed Forces India. 2016;72(2):178–9. doi:10.1016/j.mjafi.2015.06.020. PubMed Central
• Wang C, Lee S, Howard A, Foley P. Coexisting median canaliform nail dystrophy and habit-tic deformity in a patient with atopic dermatitis. Australas J Dermatol. 2020;61(1):e100–1. doi:10.1111/ajd.13084. PubMed