Katsumi Takase

Tokyo Medical University, Edo, Tōkyō, Japan

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Publications (28)27.01 Total impact

  • Katsumi Takase, Kengo Yamamoto
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    ABSTRACT: Generally, surgical treatment is recommended for Rockwood type 5 traumatic acromioclavicular joint dislocations. Since 1980, the authors have performed the modified Dewar procedure, the modified Cadenat procedure, and anatomical reconstruction of the coracoclavicular ligaments for this injury. The goal of this study was to determine the ideal surgical procedure for acromioclavicular joint dislocations by comparing these 3 procedures. The modified Dewar procedure was performed on 55 patients (Dewar group), the modified Cadenat procedure was performed on 73 patients (Cadenat group), and anatomical reconstruction of the coracoclavicular ligaments was performed on 11 patients (reconstruction group). According to the UCLA scoring system, therapeutic results averaged 27.3 points in the Dewar group, 28.2 in the Cadenat group, and 28.4 in the reconstruction group. The incidence of residual subluxation or dislocation in the acromioclavicular joint was evaluated at final radiographic follow-up. Subluxation occurred in 21 patients in the Dewar group, 18 in the Cadenat group, and 3 in the reconstruction group. Dislocation occurred in 3 patients in the Dewar group. Osteoarthritic changes in the acromioclavicular joint occurred in 20 patients in the Dewar group, 9 in the Cadenat group, and 1 in the reconstruction group. The modified Cadenat procedure can provide satisfactory therapeutic results and avoid postoperative failure or loss of reduction compared with the modified Dewar procedure. However, the modified Cadenat procedure does not anatomically restore the coracoclavicular ligaments. Anatomic restoration of both coracoclavicular ligaments can best restore acromioclavicular joint function.
    Orthopedics 10/2013; 36(10):e1277-e1282. · 1.05 Impact Factor
  • Katsumi Takase, Akira Morohashi
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    ABSTRACT: We describe a case report of dorsal radiocarpal dislocation with fracture of the radial styloid process. A 21-year-old right-handed male was injured in a fall while snowboarding. Plain radiographic findings revealed dorsal dislocation of radiocarpal joint with fracture of the radial styloid process; we performed CT studies to examine the radius fracture in greater detail. These findings revealed a radial styloid fracture with avulsion fracture of dorsal articular margin of the distal part of the radius. Surgical treatment was performed 4 days after the injury. However, it was impossible to reduce the dorsal dislocation of radiocarpal joint only after the fixation of the radial styloid process. The dorsal radiocarpal ligaments and articular capsule had ruptured transversely on the radiocarpal joint with avulsion fracture of dorsal articular margin of the distal part of the radius. To repair the torn ligaments and capsule, we inserted three mini suture anchors into the dorsal edge of the radius and fixed these tissues on the radius. At present, 1 year after surgery, he has no pain with activity or at rest, and satisfactory results have been obtained.
    European Journal of Orthopaedic Surgery & Traumatology 08/2012; · 0.18 Impact Factor
  • Katsumi Takase, Kengo Yamamoto
    The Journal of hand surgery, European volume. 04/2012;
  • Katsumi Takase, Ryohei Kono, Kengo Yamamoto
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    ABSTRACT: The distal clavicle fractures are divided into three types according to Neer's classification. Types 1 and 3 fractures are treated with a sling to immobilize the upper extremity. However, the treatment of type 2 fractures is controversial. We paid attention to the anatomic basis of type 2 fractures that the disruptions of the conoid ligament lead to the distraction between the two bony fragments. In this study, we describe the arthroscopic procedure to reconstruct the disrupted ligament and stabilize the fracture as a minimally invasive method. The subjects were seven patients with the distal clavicle fractures. According to Neer's or Rockwood's classification on plain radiographs, all seven patients were evaluated as type 2 or 2B, respectively. Our surgical procedure was performed with the patient in the beach chair position. We have used the artificial ligament with an EndoButton (Smith & Nephew Endoscopy, Andover, MA) as the substitute ligament to reconstruct the disrupted conoid ligament. The mean duration of postoperative follow-up was 2 years and 5 months. The bony union was achieved in all patients at a final follow-up. When concerning the range of motion at final examinations, mean forward flexion was 171°, mean abduction was 165°, mean internal rotation was Th11, and mean horizontal adduction was 132°. It is possible to treat the distal clavicle fractures by a minimally invasive arthroscopic procedure without opening the fracture site of clavicle.
    Archives of Orthopaedic and Trauma Surgery 03/2012; 132(3):399-403. · 1.36 Impact Factor
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    ABSTRACT: The surgical treatment for acromioclavicular joint dislocations is recommended for Rockwood's classification types 4, 5 and 6. In this study we evaluate the therapeutic results of the modified Cadenat procedure on type 5 acromioclavicular joint dislocation, and report on a comparative study of the modified Dewar procedure also on type 5 acromioclavicular joint dislocation. The modified Cadenat procedure was performed on 73 patients (66 males and 7 females, group C). The mean age at the time of the surgery was 35.4 years. On the other hand, the modified Dewar procedure was performed on 55 patients (51 males and 4 females, group D). The mean age at the time of the surgery was 34.5 years. The mean therapeutic results were 28.2 points in group C and 27.3 in group D according to the UCLA scoring system. In group C, the subluxation that represented less than 5 mm superior translation of the clavicle, occurred only in 18 of 73 patients. Meanwhile, in group D, the subluxation that represented less than 5 mm, occurred only in 14; that which represented 5 to 10 mm was in seven patients, and the complete dislocation occurred in three patients. Also, the occurrence of osteoarthritic changes in the acromioclavicular joint was nine patients in group C and 20 in group D, respectively. The modified Cadenat procedure could provide satisfactory therapeutic results and avoid postoperative failure of reduction compared to the modified Dewar procedure. However the modified Cadenat procedure does not aim to restore the anatomical coracoclavicular ligaments. It is believed that anatomic restoration of both coracoclavicular ligaments could best restore the function of the acromioclavicular joint.
    The West Indian medical journal 06/2011; 60(3):303-7. · 0.32 Impact Factor
  • Katsumi Takase, Jun Mizuochi
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    ABSTRACT: Irreducible isolated dislocation of the radial head is a rare injury. In this study, we describe a patient with irreducible dislocation of the radial head associated with an undisplaced fracture of the olecranon. A 6-year-old girl fell down while walking and suffered injury to the posterior aspect of the proximal ulnar shaft with the right elbow in a slightly flexed position. Plain radiographs of the elbow revealed an anterior-medial dislocation of the radial head and an undisplaced fracture of the olecranon. However, the attempted closed reduction was not successful. An open reduction was then performed through a lateral approach. The radial head was found to be protruding through a buttonhole tear of the anterior joint capsule, causing the joint to become interposed between the articular surfaces of the joint, precluding closed reduction. Once the interposed capsule was extricated from the joint, the radial head could be easily reduced. At this point, no tear of the annular ligament was observed. Six months after the surgery, the patient was able to use her elbow fully and without pain. The range of motion was 0-140° for both extension and flexion and 90° for pronation and supination. Plain radiographs revealed a united bone of the olecranon and good reduction of the radial head. The radial head pushed through the tear of the anterior joint capsule. This buttonhole effect on the radial head prevented closed reduction of the radial head.
    Journal of pediatric orthopaedics. Part B / European Paediatric Orthopaedic Society, Pediatric Orthopaedic Society of North America 03/2011; 20(5):345-8. · 0.66 Impact Factor
  • Katsumi Takase
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    ABSTRACT: Backgrounds Acromioclavicular joint separation is divided into three types according to Tossy and six types according to Rockwood. However, the trapezoid and conoid ligaments that constitute the coracoclavicular ligaments are not detailed in these classifications. In this study, we investigated the location and degree of ligament injury in acromioclavicular joint separation by means of magnetic resonance (MR) images. Study designs Cross-sectional study. Methods The study subjects were 25 patients (21 men and 4 women) ranging in age from 19 to 58 years (mean: 31.1 years). According to Rockwood’s classification criteria, these patients consisted of one case in type 1, seven cases in type 2, seven cases in type 3, and ten cases in type 5. All patients were also performed the procedure for MR images and enhanced MR images with intravenous gadolinium injection within 3 days after the occurrence of injury. Results Both the trapezoid and conoid ligaments had ruptured in fifteen cases of the seventeen cases in types 3 and 5. Both ligaments had ruptured at the same locations in eleven of the fifteen cases. However, there were four cases in which the ligaments had ruptured at different locations. On the other hand, the conoid ligaments did not clearly demonstrate abnormal findings, but the trapezoid ligaments had ruptured in all cases of type 2. Conclusion The coracoclavicular ligament injuries evaluated by MR images and enhanced MR images were not always coincident with Rockwood’s classification criteria from plain X-ray films, especially in types 2 and 3 of acromioclavicular joint separation.
    European Journal of Orthopaedic Surgery & Traumatology 01/2011; · 0.18 Impact Factor
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    ABSTRACT: Osteoid osteoma is a relatively common osteoblastic lesion of benign skeletal neoplasms and occurs most commonly in the cortex of long bones, especially the femur and the tibia. Radiological characteristics are a nidus that appears as a small, relatively radiolucent zone within an area of extensive reactive sclerosis. Clinically, the lesion presents with increasing pain, is worse at night, and is relived by nonsteroidal anti-inflammatory drugs (NSAIDs). Osteoid osteomas involving the phalanges of the toes are uncommon, and its accurate preoperative diagnosis is difficult due to the unique clinical and radiological features. The features in the phalanx of the toe are soft tissue swelling and a nidus frequently located in the cancellous without osteosclerosis. This article presents a case of a 22-year-old man with osteoid osteoma in his distal phalanx of the hallux. A needle biopsy of his great toe revealed a small number of bacteria, so he was initially treated for osteomyelitis but with unsatisfactory results. The particular characteristics of clinical and imaging findings supported a diagnosis of osteoid osteoma in the distal phalanx of the hallux. After surgical removal of the tumor, his symptoms resolved. The pathological examination confirmed the suspected diagnosis. In a patient with chronic foot pain that changes to become nocturnal and disappears with NSAID administration, it is important to include osteoid osteoma as a differential diagnosis. A detailed assessment of both clinical and radiological features can lead to the correct diagnosis, which must be confirmed with histopathological examination to ensure adequate excision.
    Orthopedics 01/2011; 34(8):e432-5. · 1.05 Impact Factor
  • K Takase, K Yamamoto
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    ABSTRACT: In this study, eighteen patients who have had perilunate injury with dislocation or fracture, were evaluated and the patho-mechanics and surgical treatment were studied. According to the Green and O'Brien's classification, type 1 injury occurred in one patient, type 2 in nine, type 4A in five, type 4C in one and type 4D in one. The other one case could not be classified using the Green and O'Brien's criteria. According to the Evans scoring system, good results were achieved in thirteen patients, fair results, in four, poor results in one and very poor results in none. When the patho-mechanics was estimated based on the Mayfield's criteria, seventeen patients were classified as stage 3. However only one case was extremely unusual and should be classified as a subtype of stage 2. The results were good in the majority of patients who had repair of perilunate injury.
    The West Indian medical journal 01/2011; 60(1):73-6. · 0.32 Impact Factor
  • K Takase
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    ABSTRACT: Since frozen shoulder is characterized by spontaneous recovery, no precise treatment strategy exists. Both conservative therapy and arthroscopic surgery is available, but the time required for recovery varies considerably. This study looks at the possible early symptom relief with oral steroid therapy. The subjects were 76 patients aged 33 to 73 years at the beginning of the study. The duration of the frozen shoulder was one to 15 months (mean 5.7 months) and hypertension was noted in 13 patients as a complicated disorder. A single course of steroid therapy consisted of a total dose of 105 mg of prednisolone over approximately a three-week period by the dose-tapering method. The number of courses varied with the degree of symptom relief but the rest period between courses was always approximately four weeks. The results were assessed on the basis of the Japanese Orthopaedic Association (JOA) score, but the principal evaluations were pain and range of motion. The average ranges of motion before treatment were 102.8 degrees of forward flexion 11.3 degrees of external rotation and internal, rotation was at the buttocks. However, after one course of treatment, forward flexion was 136 degrees, external rotation was 33.7 degrees, and internal rotation was limited to the buttocks in only six cases. The results of oral steroid therapy for frozen shoulder were highly satisfactory. However, sufficient care is required in explaining the method of administration and the adverse effects such as the osteonecrosis of the femoral head or osteoporosis.
    The West Indian medical journal 12/2010; 59(6):674-9. · 0.32 Impact Factor
  • Katsumi Takase
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    ABSTRACT: Dupuytren contracture is not a rare disorder. However, the contracture limited to the DIP joint is rare conditions. In this study, we describe a case of Dupuytren contracture limited to the DIP joint occurred in the ring finger.
    Joint, bone, spine: revue du rhumatisme 10/2010; 77(5):470-1. · 2.25 Impact Factor
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    Katsumi Takase
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    ABSTRACT: La maladie de Dupuytren est fréquente, mais rarement limitée à l’articulation interphalangienne distale (IPD). Nous décrivons le cas d’une maladie de Dupuytren limitée à l’articulation IPD de l’annulaire droit.
    Revue du Rhumatisme 10/2010; 77(5):517-519.
  • Katsumi Takase
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    ABSTRACT: The treatment for the acromioclavicular joint dislocations has focused on anatomic restoration of the coracoclavicular ligaments. We reviewed the detailed anatomy of trapezoid ligaments and conoid ligaments using cadavers. The subjects were 40 shoulders of the 20 cadavers. We investigated the distributed direction and attachment sites of both trapezoid and conoid ligaments. The trapezoid ligaments began at about 2 cm away the central point of the distal coracoid process and directed toward the undersurface of the clavicle. The attachments extended from 13 to 26 mm in sagittal dimension and from 13 to 15 mm in coronal dimension. The conoid ligaments began at the medial posterior margin of the coracoid process and directed toward to the conoid tubercle in the clavicle. The attachments extended from 15 to 30 mm in sagittal dimension and from 3 to 6 mm in coronal dimension. The findings are important indices for the accurate reconstruction of the coracoclavicular ligaments in acromioclavicular joint dislocations.
    Anatomia Clinica 05/2010; 32(7):683-8. · 0.93 Impact Factor
  • K Takase, H Suzuki, H Matsuoka
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    ABSTRACT: Malignant fibrous histiocytoma (MFH) is a type of highly malignant soft tissue sarcoma with a predilection for the extremities of adults. We report a patient with MFH in the infraspinatus muscle for which wide resection including total resection of the infraspinatus muscle was performed, followed by transfer of the latissimus dorsi muscle for shoulder reconstruction in a one-stage operation with good postoperative function.
    The West Indian medical journal 01/2010; 59(1):106-9. · 0.32 Impact Factor
  • Akira Morohashi, Katsumi Takase
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    ABSTRACT: This article presents a rare case of simultaneous triple joint injuries in the same digit. A 54-year-old, right-handed man sustained simultaneous triple joint injuries in a digit, composed of a fracture of the dorsal base of the distal phalanx involving one-third of the phalanx, dorsal dislocation of the proximal interphalangeal joint with a volar plate fracture, and ulnal dislocation of the metacarpophalangeal joint. Surgery was performed on the patient. Two years postoperatively, active range of motion of the distal interphalangeal joint improved from 0 degrees to 40 degrees, of the proximal interphalangeal joint improved from -20 degrees to 100 degrees, and of the metacarpophalangeal joint improved from 5 degrees to 90 degrees. Grip strength was 32 kg compared to 35 kg on the nonaffected side. No ligamentous laxity was demonstrated in the finger joints. A fracture involving one-third of the phalanx may be caused by forced hyperextension of that joint. This hyperextension may result in a tear of the volar plate of the proximal interphalangeal joint, leading to a dislocation at that joint. This continuous force directs the metacarpophalangeal joint in a slight ulnal shift, and may result in rupture of the medial collateral ligament in the metacarpophalangeal joint. To our knowledge, this injury has not been reported in the literature.
    Orthopedics 05/2009; 32(4). · 1.05 Impact Factor
  • Katsumi Takase, Koutaro Shinmura, Kengo Yamamoto
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    ABSTRACT: We treated a combined fracture of the greater and lesser tuberosity with head shaft continuity in the proximal humerus. This case is impossible to classify in three of the classifications, the Neer classification, AO Müller classification, or Jakob classification. However, this case has been described as fracture types in two different categories in the Codman classification. Based on our experience with this case, we concluded that both the plain radiographs and the CT scans were necessary to make a correct diagnosis and classify the fractures of the proximal humerus.
    Archives of Orthopaedic and Trauma Surgery 01/2008; 127(10):895-8. · 1.36 Impact Factor
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    K Takase, A Watanabe, K Yamamoto
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    ABSTRACT: A 41-year-old right-handed woman was involved in a traffic accident and landed on the right arm while the right shoulder was in flexion. She experienced pain and severe impairment of right shoulder motion immediately following the accident. She was misdiagnosed with a fractured proximal humerus with no displacement and was treated conservatively by immobilisation. There was inadequate recovery in range of motion and gradual development of severe pain. Two years and 4 months after the injury, the patient presented to our hospital where a diagnosis of chronic posterior fracture dislocation of the shoulder with split articular surface of the humeral head was made. A humeral head replacement without resection of the greater tuberosity or the coracoid process was performed. Postoperative recovery was uneventful. The patient returned to work as a cook one year later. At 20-month follow-up, the patient had no pain, and her shoulder range of motion was forward flexion 160 degrees, abduction 140 degrees, external rotation 40 degrees, and internal rotation L3.
    Journal of orthopaedic surgery (Hong Kong) 09/2006; 14(2):204-7.
  • Katsumi Takase, Kengo Yamamoto
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    ABSTRACT: All perilunate fracture-dislocations combine ligament ruptures, bone avulsions, and fractures in a variety of clinical forms. The most frequent is the dorsal trans-scaphoid perilunate dislocation. In rare cases, however, these dislocations also have been associated with capitate fractures, triquetral fractures, or lunate fracture. We report a combined scaphoid and lunate fracture of the wrist that was not associated with perilunate dislocation.
    The Journal Of Hand Surgery 04/2006; 31(3):414-7. · 1.57 Impact Factor
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    Katsumi Takase, Kengo Yamamoto
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    ABSTRACT: Diagnostics of intraarticular lesions is important in the treatment of traumatic anterior shoulder instability. We studied 30 patients: 26 men and 4 women. For all patients preoperative examinations involved arthrography, CT arthrography, MR arthrography, and 3D-CT. The articular capsule adhered to the margin of the glenoid in only 3 cases. In the remaining 27 patients, the joint capsule was detached, showing medial translation. Hill-Sachs lesions were present in 24 cases. Bankart lesions were detected in all cases, and they extended over 2-5 h. Osseous Bankart lesions were detected in 13 cases. MR arthrography revealed the articular labrum in all cases, but AIGHL in only 16 cases. Bankart lesions were found in all cases. When the patients were divided according to the frequency of dislocation, there was a correlation between both distance of the detached joint capsule and visualization of AIGHL and the frequency of dislocation. From this study, the frequency of dislocation was higher in the patients with severe detachment of the joint capsule, in whom AIGHL could not be visualized by MR arthrography.
    Acta Orthopaedica 12/2005; 76(6):854-7. · 2.74 Impact Factor
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    Katsumi Takase, Kengo Yamamoto
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    ABSTRACT: We examined histological changes in the undersurface of the acromion in patients with symptoms of subacromial impingement, in order to clarify whether or not these changes are the main cause of rotator cuff tear. We studied 39 shoulders. The undersurface of the acromion and the coracoacromial ligament were examined by light microscopy and transmission electron microscopy. The distinct four-layer structure seen in the undersurface of the acromion of normal subjects was not found in any of our patients. In patients with full-thickness cuff tear, the extent of the tear had a greater association with the degree of degeneration in the undersurface of the acromion than age or the duration of illness. There was little association between structural changes in the coracoacromial ligament and the extent of or the presence of full-thickness cuff tear, or the duration of illness, but there was a strong association with patient age. The histological changes in the undersurface of the acromion in patients without cuff tear were merely minute changes compared to those in patients with full-thickness cuff tear. We conclude that the advanced degenerative changes in the undersurface of the acromion result from full-thickness cuff tear.
    Acta Orthopaedica 07/2005; 76(3):386-91. · 2.74 Impact Factor