Items tagged “thumb”
11 results found
Article
Bennett fracture
A Bennett fracture is a fracture of the base of the thumb resulting from forced abduction of the first metacarpal. It is defined as an intra-articular two-part fracture of the base of the first metacarpal bone.
Radiographic features
Plain radiograph
two piece fracture of the base of the th...
Article
Epibasal fracture of the thumb
Epibasal fractures of the thumb (also called pseudo-Bennett fracture) are extra-articular two-piece fractures of the proximal first metacarpal bone. They are usually stable, depending on the degree of displacement, and often do not require surgery. It is important to distinguish them from intra-...
Article
Rolando fracture
Rolando fracture is a three-part or comminuted intra-articular fracture-dislocation of the base of the thumb (proximal first metacarpal). It can be thought of as a comminuted Bennett fracture.
Epidemiology
The vast majority of cases occur in men, with a male to female predominance of 10:1. It ...
Article
Fractures of the thumb
Fractures of the thumb are important due to huge impact the thumb has on the overall function of the hand, an understanding of the types of fractures that occur is important, as treatment varies with fracture type.
Pathology
Types
Metacarpal fractures include:
intra-articular fractures
...
Article
Stener lesion
Stener lesions are seen in the context of a torn ulnar collateral ligament (UCL) of the thumb's metacarpophalangeal (MCP) joint (gamekeeper's thumb) resulting in an interposition of the adductor pollicis aponeurosis between the ulnar collateral ligament and the MCP joint.
Epidemiology
Stener l...
Article
Absent thumb
An absent thumb can have many associations. They include:
Fanconi anemia (pancytopenia-dysmelia syndrome)
Franceschetti syndrome
Holt-Oram syndrome
phocomelia (e.g. thalidomide embryopathy)
Poland syndrome (pectoral muscle aplasia and syndactyly)
Rothmund-Thomson syndrome
Seckel syndrome ...
Article
Triphalangeal thumb
Triphalangeal thumb is considered a form of pre-axial polydactyly.
Epidemiology
Triphalangeal thumbs have an incidence of 1 in 25,000 7.
Associations
There is a long list of associations 1-6:
Aase syndrome
anatomic variant: isolated anomaly
Diamond-Blackfan syndrome
DOOR syndrome
Duan...
Article
Abductor pollicis brevis muscle
The abductor pollicis brevis muscle is a thin subcutaneous muscle located laterally in the thenar eminence of the hand, and is one of the intrinsic muscles of the hand.
Summary
origin: mainly from the flexor retinaculum
few fibers originate from the tubercles of scaphoid and trapezium and ten...
Article
Zone classification of flexor tendon injury
The zone classification of flexor tendon injuries divides injuries into five zones based on anatomical location. It is the most widely used flexor tendon injury classification system (c. 2007) 1.
Classification
Flexor tendon injuries were classified into five zones by Kleinart and Verdan in 19...
Article
Anterior oblique ligament of the thumb
The anterior oblique ligament of the thumb is one of several carpometacarpal ligaments of the thumb and also one of its main stabilizers 1.
Terminology
The anterior oblique ligament of the thumb is also known as the ‘beak ligament’. It can be divided into a superficial and a deep component and...
Article
Dorsal deltoid ligament complex of the thumb
The dorsal deltoid ligament complex of the thumb encases the first carpometacarpal joint from the dorsal and radial aspect and is considered a primary stabilizer of the first carpometacarpal joint.
Gross anatomy
The dorsal deltoid ligament complex of the thumb consists of the following three c...
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