BACKGROUND: To understand considerable variations in number of adult extensor ten-dons at the dorsal side of the wrist and hand.
METHODS: We examined histological sections from 30 human fetuses of gestational age 7-39 weeks and crown-rump length 22-323 mm.
RESULTS: At the carpal level, earlier or smaller fetuses showed a simpler configuration with fewer tendon slips, whereas later or larger fetuses had a greater number of tendon slips with considerable variations in number and topographical relationships. Tendon slips of the early extensor digitorum to the middle and ring fingers were always 1 or 2, but were seven or more at late term. A tendon of the extensor digitorum to the little fin-ger could not be distinguished from other tendons at the carpal bone level. At the meta-carpal bone level, however, it extended from the ring finger tendon toward two slips of the extensor digiti minimi tendon. At the distal carpal level at midterm and late term, in which the tendon sheath was lost, each of the extensor digitorum tendon slips further divided to provide a mediolateral linear cluster of thin bundles. This large number of tendon components joined and united together to provide a single tight tendon at the level of the metacarpophalangeal joints. The extensor pollicis longs tendon usually lost a membranous septation when it crossed the extensor carpi radialis brevis tendon.
CONCLUSIONS: Tendon slips in the fourth and fifth canals of the sheath were most likely to reduce in number after birth depending on the mechanical demand.

Complete extension of the thumb and activation of the extensor pollicis longus (EPL) tendon are fundamental to ensure maximum function. Many EPL repair techniques are described in the literature.
The authors present an alternative technique using the brachioradialis (BR) tendon. Thirty patients with injuries of the EPL tendon in zone 8 were studied. In all cases, neither direct suture repair nor traditional tendon transfer was possible.
Thumb extension was restored in all patients with satisfactory extension recovery. All patients achieved excellent extension; good functional results were observed in 2 cases, and in 1 case satisfactory results were achieved using the Geldmacher assessment and the Kapandji assessment. The overall results were rated as excellent, good, fair, or poor according to the Quick Disabilities of the Arm, Shoulder, and Hand Scale.
The BR tendon was suitable to treat all cases, in particular injuries occurring near Lister\'s tubercle, due to its appropriate length for tenorrhaphy albeit with a short distal head.

UNASSIGNED: Spontaneous rupture of extensor pollicis longus (EPL) tendon is a rare condition often found in patients actively having regular extensive use of hands and fingers especially the thumb. In this article, we report 7 cases of spontaneous rupture of EPL tendon and investigate the associated factors and treatment outcome.
UNASSIGNED: Retrospectively, the databases for the 7 cases were retrieved and studied. These cases represent all cases of spontaneous rupture of EPL in our institution. Demographic data, clinical presentation, any history of trauma or steroid injection, laboratory and clinical findings suggestive for rheumatoid arthritis, co-morbidities and imaging findings were obtained. In addition, the operative technique and findings were retrieved. Moreover, histopathological studies and follow-up assessment were included.
UNASSIGNED: Six males and one female were included. The mean age was 45.2 years. No prior history of trauma, rheumatological disease or steroid use was detected in any patient. All patients experienced prodromal pain in the radial side. Clinical examination was the most effective diagnostic measure. Magnetic resonance imaging (MRI) was used to confirm the diagnosis and to look for other abnormalities that may predispose to rupture. Five patients underwent extensor indicis proprius to EPL tendon transfer employing Pulvertaft weave technique and one patient underwent primary repair as there was a little gap in the tendon ends. In this study, one patient refused any treatment. All patients achieved a favorable outcome at the last follow-up.
UNASSIGNED: Diagnosis of spontaneous ruptures of EPL tendon can be confirmed through clinical examination and MRI for patients with restricted thumb movement even with the absence of any identifiable predisposing risk factor. During surgery, detailed attention must be drawn towards the tendon ends which can have unusual gaps and bone abnormalities.

UNASSIGNED: Optimal treatment of persistent radial nerve palsy is controversial. However, most authors agree that tendon transfers lead to satisfactory result in majority of patients. Triple tendon transfer using flexor carpi radialis, pronator teres, and palmaris longus is the most preferred tendon transfer. The aim of this study was to evaluate the results of a split flexor carpi ulnaris (FCU) as a single transfer in such patients and compare our results with other transfers from the available literature.
UNASSIGNED: A total of 25 patients (20 males and 5 females: mean age: 30.9 years) were selected for FCU split transfer in persistent radial nerve palsy injury from April 2014 to May 2015. All patients were followed up with a mean followup of 1 year. Clinical outcomes were assessed using Bincaz score.
UNASSIGNED: Using Bincaz score, 68% of our patients had good-to-excellent result, while 32% patients had fair and none had bad results. Wrist extension was comparatively less in high radial nerve palsy as compared to low radial nerve palsy patients, but all patients were functionally independent. Power grip was assessed using a jammer dynamometer. All patients had adequate grip strength and good active extension of the wrist and fingers.
UNASSIGNED: Single transfer using split FCU can be a preferred alternative in patients of low radial nerve palsy, it can be considered for high radial nerve patients in whom multiple donors are absent due to the nature of injury, for example, brachial plexus injury.