[Peroneal Nerve Palsy Management by Tibialis Posterior Muscle Transposition - Anatomical and Clinical Study]. / Resení peroneální parézy transpozicí musculus tibialis posterior ­ anatomická a klinická studie.

PURPOSE OF THE STUDY Transposition of tibialis posterior muscle ranks among the methods of dorsiflexion restoration in patients with peroneal nerve palsy. Even though this method is commonly used, anatomical variations are still encountered which make us modify the established procedures. The purpose of this study is to evaluate the functional outcomes of operated patients and based on the clinical experience to define by cadaver preparation the anatomical causes preventing the use of the standard transposition technique. MATERIAL AND METHODS The clinical group includes 21 patients (15 men, 6 women) with the mean age of 34.2 years and with common peroneal nerve palsy confirmed by EMG. In 20 patients, transposition of the tendon of the tibialis posterior muscle (MTP) through the interosseous membrane of the leg was performed. In one patient the tendon was transposed ventrally to the distal end of the tibia and fixed in the lateral cuneiform bone due to an extremely narrow space of the interosseous membrane of the leg distally between the lower limb bones. In 18 patients the tendon was fixed by osteosuture to the base of 3rd metatarsal bone, in three patients to the lateral cuneiform bone. The outcomes were evaluated at 6 months after the surgery, when active ankle dorsiflexion (DF) range of motion greater than 5° was considered an excellent outcome, active position at 90° up to DF less than 5° a satisfactory outcome, and any plantigrade position as a poor outcome. The anatomical study included 20 extremities fixed by formalin (10 cadavers, 5 men and 5 women with the mean age of 71.3 years). The length of the individual parts of tibialis posterior muscle was measured and the variations of the muscle attachment were evaluated. The measurement was concluded by a simulation of surgical procedure. RESULTS When evaluating the clinical group, an excellent outcome was reported in 12 patients (57%), a satisfactory outcome in 8 patients (38%) and a poor outcome in one patient (5%). When evaluating the anatomical group, a division of the attaching part of the tendon into three main strips was observed. The thickest middle strip attached to the tuberosity of navicular bone and medial cuneiform bone was reported in all the specimens. The thinner lateral strip (originating from the tendon in 90% of specimens) was attached to the intermediate and lateral cuneiform bone, the cuboid bone, metatarsal bones II-V, and moreover it grows into the origin of the flexor hallucis brevis muscle. The third strip of the tendon attached to the sustentaculum tali, plantar calcaneonavicular ligament and fibrocartilago navicularis was missing in one specimen (5%). When the passing the tendon through the interosseous space between the lower limb bones was simulated in order for the tendon to go in the direction of the planned traction, in two specimens (10%) the pulling through was impossible due to the tendon being thicker than the interosseous space. In two specimens (10%) it was not the tendon, but already the muscular belly which passed through the given space. DISCUSSION In our group, 95% of the functional outcomes were excellent or satisfactory. A poor result was reported in one patient, in whom the EMG examination was not performed as a standard procedure and in whom the muscular strength was insufficient to achieve full dorsiflexion of the ankle. The anatomical study indicates that the narrow space between the lower limb bones can prevent the pulling through of the tendon, which can be addressed intraoperatively by the transposition of the tendon ventrally to tibia. The study reveals that the tendon necessary for transposition can be elongated by the strips of the tendon attached to the sole of the foot. CONCLUSIONS The knowledge of the anatomical conditions may help us better manage potential complications intraoperatively. Key words: tibialis posterior muscle, peroneal nerve palsy, transposition of tibialis posterior muscle, anatomy of tibialis posterior muscle, common fibular nerve palsy.

HAS A GLOMUS TUMOR ALWAYS A QUICK DIAGNOSIS?

INTRODUCTION: Glomus tumor is a rare and benign vascular tumor. Although symptoms specific for this tumor are quite clear, there is still a delay between the onset of symptoms, diagnosis and subsequent surgical therapy. The authors monitor the time from the onset of symptoms to the diagnosis and management of the problems. MATERIAL AND METHODS: Between 2004-2012, a total of 5 patients were diagnosed with subungual glomus tumor in the area of the distal phalanges of the hand. It involved 3 women and 2 men with the mean age of 32.2 years (26-47 years). During the first examination, we monitored the duration of symptoms, number and specialty of the doctors who examined the patient, and what examinations were performed. When the cold test was positive, MRI was performed and the patients were indicated for surgical revision. Tissue samples in all patients were histologically examined. Patients were followed for 2 years. RESULTS: It was found that the patients had clinical symptoms for an average of 2.4 years. In our group, the patients were examined by an average of 5.4 physicians (3-9 physicians). On examination before surgery, three patients reported changes in the nail bed and two patients reported no change. When following the patients 2 years after the surgery, relapse occurred in one patient and it was treated with reoperation. During regular follow-up 2 years after the surgery, 4 patients were without nail deformity. In one patient, there was resulting nail deformity. Relapse occurred in only one case. DISCUSSION: Because the glomus tumor is a rare lesion, occurring most frequently in the nail bed, early diagnosis is still a problem. Even in literature, we encounter a similar time frame from the onset of symptoms until the final diagnosis of 1.9 to 8 years. CONCLUSION: Although clinical signs and problems concerning the glomus tumor are very obvious, there still remains a long time for diagnosis. It would certainly be most beneficial for patients with persistent symptoms not to be referred to different specialists, but directly to a department that specializes in hand surgery.

[Perilunátní poskození zápestí]. / Perilunátní poskození zápestí.

PURPOSE OF THE STUDY Perilunate dislocations and perilunate fractures are serious wrist injuries which are often overlooked at primary treatment. Their inadequate therapy results in severe wrist damage and patient disability. An early diagnosis and correct therapy can prevent such conditions. MATERIAL AND METHODS A group of 25 patients with 26 wrist injuries is presented. It included nine patients with isolated perilunate dislocations (34%), 11 patients with trans-scaphoid perilunate dislocations (44%),two with trans-radial trans-scaphoid perilunate dislocations (7%) and next two patients with trans-radial perilunate dislocations (7%). One patients had, in addition to perilunate dislocation, injury to the capitohamat joint with damage to both portions of the interosseous ligament (4%). One patient (4%) sustained a trans-scaphoid perilunate dislocation with injury to the scapholunate ligament, in which the proximal pole of the scaphoid was separated and interfered with dislocation reduction. RESULTS The correct diagnosis was made on early examination in 16 patients (62%), within a week of injury in four patients (15%), within a months of injury in two patients (8%) and even later in four patients (15%). The results of treatment evaluation based on the Wrightington Hospital Wrist Scoring System were excellent in 19%, good in 54%, satisfactory in 19% and poor in 8% of the patients. The poor result in one patient was due to necrosis of the lunate bone;the diagnosis of a perilunate dislocation was made within a month of injury. The poor results in the other patient were associated with complex regional pain syndrome. DISCUSSION Perilunate injuries of the wrist are quite frequent and although the treatment procedure is commonly known, its principles are not always obeyed. A good outcome is related to an early diagnosis and correct reconstruction of the injured structures. In our group, the diagnosis was made at the first examination in only 62% of patients and later than a week after injury in 23%. The patient in whom necrosis of the lunate bone developed had the diagnosis made at 1 post-injury month. Early reduction of bone structures and reconstruction of ligaments also contribute to good results. CONCLUSIONS Good outcomes in perilunate injuries depend on an early and correct diagnosis, an appropriate therapeutic procedure and an orthopaedic surgeon who has experience with management of such injuries. A deep knowledge of wrist kinetics is necessary for this therapy as not all injuries happen according to textbook descriptions. Key words: perilunate dislocation, carpal instability, damage to carpal ligaments.