subungual exostosis

WordNet

1. a benign outgrowth from a bone (usually covered with cartilage)

Wikipedia preview

出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2014/12/23 02:13:44」(JST)

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Subungual exostoses are bony projections which arise from the dorsal surface of the distal phalanx, most commonly of the hallux.

Presentation

They tend to be painful due to the pressure applied to the nail bed and plate. They can involve destruction of the nail bed. These lesions are not true osteochondromas, rather it is a reactive cartilage metaplasia. The reason it occurs on the dorsal aspect is because the periosteum is loose dorsally but very tightly adherent volarly.

Subungal malignant melanomas can also occur in canines.

They are distinct from subungual osteochondroma.

• Subungual exostosis (1/3), in a boy of 15 years old

• Subungual exostosis (2/3)

• Subungual exostosis (3/3), after excision

Treatment

Surgical excision is common and is a very effective mode of treatment.

See also

• Sternal cleft
• List of cutaneous conditions

References

See also

• exostosis

UpToDate Contents

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• 1. 爪疾患の概要 overview of nail disorders
• 2. 爪の手術の原則および概要 principles and overview of nail surgery

English Journal

• Second toe swelling: Nora's lesion or glomus tumour, case report and literature review.

• Mohammad A, Kilcoyne A, Blake S, Phelan M.SourceDepartment of Rheumatology and Radiology, South Infirmary Victoria University Hospital, Cork, Ireland. ausafmohammad@gmail.com
• Irish journal of medical science.Ir J Med Sci.2012 Sep;181(3):357-60. Epub 2009 Oct 8.
• INTRODUCTION: We report a rare case of bizarre parosteal osteochondromatous proliferation (BPOP, Nora's lesion) of the right second toe in a 60-year-old man who presented with painful, bluish and bulbous swelling of the right second toe without any break in the skin.INVESTIGATIONS: Physical examinat
• PMID 19813049

• Subungual exostosis of the fifth toe in children.

• Hawilo A, Zaraa I, Trojjet S, Chelly I, Haouet S, Mourad M, Ben Osman A.
• Journal of pediatric orthopedics. Part B.J Pediatr Orthop B.2012 Jul;21(4):377-8. doi: 10.1097/BPB.0b013e32834d4de8.
• PMID 22080296

Japanese Journal

• 経験と考察 足趾爪下外骨腫に対するopen methodの術後成績

• 下平 浩揮,藤岡 文夫,松原 光宏
• 整形外科 = Orthopedic surgery 64(7), 607-610, 2013-07
• NAID 40019747838

• Bizarre parosteal osteochondromatous proliferation (Nora's lesion) of the foot

• HORIGUCHI Hisashi,SAKANE Masataka,MATSUI Miwa,WADANO Yasuyoshi
• Pathology international 51(10), 816-823, 2001-10-01
• NAID 10012293765

• 爪下外骨腫に対する爪還納手術法

• 笠原 俊幸,坪山 直生,戸口田 淳也,中村 孝志,笠原 勝幸
• 中部日本整形外科災害外科学会雑誌. 中部日本整形外科災害外科学会抄録 44(5), 1209-1210, 2001-09-01
• NAID 10009770372

Related Links

• Subungual exostosis. DermNet NZ

Subungual exostosis. Authoritative facts about the skin from DermNet New Zealand. ... Investigations It is important to perform X-rays of the lesion to confirm its bony origin. Biopsies are rarely required. Differential diagnosis

• subungual exostosis - definition of subungual exostosis by ...

sub·un·gual ex·os·to·sis painful osseous outgrowths that elevate the nail of the great toe or fingers in young people. osteocartilaginous exostosis; osteochondroma; subungual exostosis benign, neoplastic pedicle of cartilage-capped ...

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