ABSTRACT
Soft tissue tumors of the foot have a low incidence rate, and most of them are symptom free, thus it is difficult to diagnose accurately. Herein, we report a 15-year-old male patient who had swelling without pain on the lateral margin of both feet. We performed excisional biopsy of the abductor digiti minimi via subtotal resection, following radiograph and magnetic resonance imaging. According to the histological analysis, hypertrophy of abductor digiti minimi was positive, and other soft tissue tumors were negative. Six months after the operation, normal appearance of both feet was maintained and the patient was satisfied with the result.
Subject(s)
Adolescent , Humans , Male , Biopsy , Foot , Hypertrophy , Incidence , Magnetic Resonance ImagingABSTRACT
Accessory muscles passing through Guyon's canal are common; the most common anomalous muscle at Guyon's canal is the accessory abductor digiti minimi muscle (AADM). The aim of this study was to demonstrate and describe the gross anatomy of an anatomic variant of the AADM relative to the surrounding structures. The AADM was found in the left forearm and hand of a 61-year-old male cadaver during dissection in a gross anatomy course. It was observed by focusing on the shape, the course, and its relationship with the surrounding structures. The AADM originated as muscle fibers from the antebrachial fascia. It coursed downward in the distal forearm and crossed the ulnar nerve and artery obliquely at Guyon's canal. The AADM narrowed and became a long tendon in the hypothenar region. The abductor digiti minimi muscle was partly attached to the tendon of the AADM, running along the tendon. The tendon of the AADM inserted into the ulnar side of head of the fifth metacarpal bone. The AADM was innervated by several twigs from the ulnar nerve. We reported herein another variant of the AADM at Guyon's canal, which may be helpful to surgeons performing diagnoses and surgical procedures.
Subject(s)
Humans , Male , Middle Aged , Anatomic Variation , Arteries , Cadaver , Fascia , Forearm , Hand , Head , Muscles , Running , Tendons , Ulnar NerveABSTRACT
The Abductor digiti minimi muscle, and the other hypotenar muscles, frequently presents anatomical variations. According to literature, this muscle can be composed by one, two or three muscular beams, as well as it can present accessory muscular beams. In dissecations of 40 formolized hands, we objectified to study the morphology and variations of the Abductor digiti minimi muscle. The muscle presented two muscular beams in 82,5 %, three beams in 15% and only 1 beam in 2,5 % of the cases. In none of cases accessory muscular beams were observed. When compared with literature, are observed statistics difference in some studied aspects. The results found in the research allow to affirm that the Abductor digiti minimi muscle is formed by two muscular beams in the biggest part of the cases. The division of the muscle in three muscular beams is common of being found.
Tanto el músculo abductor del dedo mínimo como los otros músculos hipotenares presentan frecuentemente variaciones. De acuerdo con la literatura, el músculo abductor del dedo mínimo puede estar compuesto por uno, dos o tres vientres musculares, como también puede presentar cabezas accesorias. Fueron disecadas 40 manos de cadáveres formolizados, para verificar la morfología del músculo abductor del dedo mínimo y sus variaciones. El músculo presentó dos cabezas musculares en el 82,5 %, tres cabezas en el 15% y solamente una cabeza en el 2,5 % de los casos. No se observaron cabezas musculares accesorias. Hubo diferencias estadísticas al comparar las observaciones registradas del músculo, con los datos de la literatura. Los resultados encontrados en esta investigación afirman que el músculo abductor del dedo mínimo de la mano está formado por dos cabezas musculares, en la mayoría de los casos. Es frecuente encontrar un músculo abductor del dedo mínimo compuesto por tres cabezas.