Prediction of muscle strength and postoperative function after knee flexor muscle resection for soft tissue sarcoma of the lower limbs

Background: To reduce the rate of anterior cruciate ligament (ACL) graft rupture, recent surgeries have involved anterolateral ligament reconstruction (ALLR). This reconstruction procedure harvests more knee flexor muscle tendons than isolated ACL reconstruction (ACLR), but its influence on knee muscle strength recovery remains unknown. This study aimed to assess the influence of ALLR with a gracilis graft on the strength of the knee extensor and flexor muscles at 6 months postoperatively. Hypothesis: The additional amount of knee flexor harvest for ALLR would result in impairment in knee flexor muscle strength at 6 months postoperatively. Study Design: Retrospective cohort study. Level of Evidence: Level 2. Methods: A total of 186 patients were assigned to 2 groups according to the type of surgery: ACL + ALLR (graft: semitendinosus + gracilis, n = 119) or isolated ACLR (graft: semitendinosus, n = 67). The strength of the knee extensor and flexor muscles was assessed using an isokinetic dynamometer at 90, 180, and 240 deg/s for concentric and 30 deg/s for eccentric contractions and compared between groups using analysis of variance statistical parametric mapping. Results: Regardless of the surgery and the muscle, the injured leg produced significantly less strength than the uninjured leg throughout knee flexion and extension from 30° to 90° for each angular velocity (30, 90, 180, and 240 deg/s). However, the knee muscle strength was similar between the ACL + ALLR and ACLR groups. Conclusion: The addition of ALLR using the gracilis tendon during ACLR does not alter the muscle recovery observed at 6 months postoperatively. Clinical Relevance: Although more knee flexor muscle tendons were harvested in ACL + ALLR, the postoperative strength recovery was similar to that of isolated ACLR.

Download Full-text

Localized lymphedema after treatment for soft tissue sarcoma in the lower limbs: Comparison of improvement according to duration before lymphaticovenular anastomosis

Clinical Case Reports ◽

10.1002/ccr3.2278 ◽

2019 ◽

Vol 7 (8) ◽

pp. 1534-1538

Author(s):

Shuhei Yoshida ◽

Isao Koshima ◽

Hirofumi Imai ◽

Toshio Uchiki ◽

Ayano Sasaki ◽

...

Keyword(s):

Soft Tissue ◽

Soft Tissue Sarcoma ◽

Lower Limbs

Download Full-text

METHODOLOGICAL APPROACH TO EVALUATE THE EFFECTS OF MUSCLE REMOVAL ON ESTIMATED MUSCLE FORCES DURING WALKING IN PATIENTS AFTER RESECTION OF SOFT TISSUE SARCOMA IN THE THIGH

Journal of Mechanics in Medicine and Biology ◽

10.1142/s0219519419500775 ◽

2020 ◽

Vol 20 (01) ◽

pp. 1950077 ◽

Cited By ~ 1

Author(s):

YUSUKE OKITA ◽

NORIATSU TATEMATSU ◽

KOUTATSU NAGAI ◽

RUI TSUKAGOSHI ◽

HIROSHIGE TATEUCHI ◽

...

Keyword(s):

Soft Tissue ◽

Muscle Strength ◽

Soft Tissue Sarcoma ◽

Methodological Approach ◽

Rectus Femoris ◽

Walking Ability ◽

Muscle Loss ◽

Muscle Forces ◽

Tumor Removal ◽

Musculoskeletal Models

Patients with lower extremity soft tissue sarcoma (STS) need to recover their walking ability while coping with lower-limb muscle loss due to tumor removal. However, the lack of information on walking after tumor removal hinders the development of gait rehabilitation strategies for such patients. The present study explored how patients walked after STS resection from the viewpoint of muscle forces. The effect of muscle removal and muscle strength asymmetry on estimated muscle forces was also investigated by iterating gait simulations for each patient using three different musculoskeletal models. These models differed based on whether or not the resected muscles were reflected in the model and whether or not residual muscle strength was scaled according to muscle strength measurements. Muscle forces during walking were estimated in six patients after thigh STS removal. Our results suggested that patients could walk using not only residual muscles that function similar to the resected muscles but also those that function differently (e.g., ankle plantarflexors). Gait simulations of patients with considerable muscle loss and those without a rectus femoris muscle were relatively sensitive to muscle removal.

Download Full-text

Comparison of Common Methodologies for the Determination of Knee Flexor Muscle Strength

International Journal of Sports Physical Therapy ◽

10.26603/001c.21311 ◽

2021 ◽

Author(s):

Dan I Ogborn ◽

Alix Bellemare ◽

Brittany Bruinooge ◽

Holly Brown ◽

Sheila McRae ◽

...

Keyword(s):

Muscle Strength ◽

Flexor Muscle ◽

Knee Flexor

Download Full-text

Clinicopathological pattern of soft tissue sarcoma in a tertiary health institution in North Western Nigeria

International Journal of Research in Medical Sciences ◽

10.18203/2320-6012.ijrms20181750 ◽

2018 ◽

Vol 6 (5) ◽

pp. 1632 ◽

Cited By ~ 1

Author(s):

Usman Malami Aliyu ◽

Ehiosa Charles Okuofo ◽

Charles Oluchukwu Okwonna ◽

Sadiku Malami Sahabi

Keyword(s):

Soft Tissue ◽

Soft Tissue Sarcoma ◽

Health Centre ◽

Soft Tissue Sarcomas ◽

Histological Type ◽

Lower Limbs ◽

Soft Tissue Tumour ◽

Age Group ◽

Female Ratio ◽

Paediatric Age

Background: Soft tissue sarcomas are a rare group of heterogeneous tumours that consist of several neoplasia which differentiate into different cell lines. They could arise from the mesodermal or ectodermal embryonic germ layers. Rhabdomyosarcoma is the most common soft tissue tumour in the paediatric age group in most studies, while in adults, malignant fibrous histocytoma, liposarcoma and fibrosarcoma are seen to be more predominant. The study aims to highlight the histological patterns, clinical presentation, associated risk factors and the patients’ performance status at presentation.Methods: This is a 5-year retrospective between the period of 2010 to 2015 of all cancer patients diagnosed with soft tissue sarcoma, seen in the department of radiotherapy and oncology, a tertiary health centre in Sokoto Nigeria. Data collected included socio-demographic, histological type, clinical features, and performance status.Results: A total of 123 patients were reviewed during the study period of 2010 to 2015: males were 81 (65.9%) and females were 42 (34.1%), with a male to female ratio of 1.93:1. The commonest histological type in both the adult and paediatric age group was rhabdomyosarcoma. Most patients presented with a swelling as seen in 62 (50.4%) cases. The extremities were the commonest site of involvement, with the lower limbs consisting 41 (33%) of the total patients reviewed.Conclusions: Rhabdomyosarcoma was the most predominant histological type of soft tissue sarcoma seen over the review period and was seen in both the paediatric and adult age groups as the commonest type.

Download Full-text

Correlation between strength and flexibility of knee flexors and extensors muscles in youth soccer players

Manual Therapy Posturology & Rehabilitation Journal ◽

10.17784/mtprehabjournal.2016.14.494 ◽

2020 ◽

pp. 1-5

Author(s):

Maira Peloggia Cursino ◽

Ana Elisa Zulliani Stroppa Marques ◽

Hugo Castellon Quatrochi ◽

Flavia Roberta Faganello Navega ◽

Cristiane Rodrigues Pedroni

Keyword(s):

Muscle Strength ◽

Significant Positive Correlation ◽

Soccer Players ◽

Muscle Injuries ◽

Flexor Muscle ◽

Positive Correlation ◽

Youth Soccer ◽

Knee Flexor ◽

H:Q Ratio ◽

The Right

Introduction: Soccer is the most played sport in the world and the one that causes more injuries. Imbalance between knee flexor and extensor is the main cause of muscle injuries in soccer players. Objective: The aim of this study was to verify the asymmetry and the correlation between the strength and flexibility of knee flexor and extensor as well as the difference of these variables between the right and left limbs in youth soccer players. Method: The sample consisted of 45 male youth soccer players for at least a year, aged between 13 and 16 years (14.7+0.86). The athletes underwent an assessment of flexibility of the posterior chain through the sit and reach test on Wells’ Bench and an assessment of flexibility of the quadriceps using the Ely’s test, with measurement of passive range of motion by goniometry. The peak of muscle strength was measured using a load cell (EMG  System, Brazil). Results: Data analysis showed difference between the values obtained in the Ely’s test of right and left leg (p=0,03), which did not happen for flexion strength (p=0.45), extension (p=0.41) and H:Q ratio (p = 0.40) when comparing the two members. It was observed a significant negative correlation between the H:Q ratio and the flexibility of the posterior chain test either for the right side (r=-0.40; p=0.006) or left side (r=-0.50; p=0.0004). Also a significant positive correlation was observed between quadriceps strength and flexibility of the posterior chain, both for the right (r=0.31; p=0.03) and the left side (r=0.32; p=0.02). Just for the left side a significant positive correlation was observed when compared the flexor muscle strength with the flexibility of the quadriceps (r=0.30; p=0.03). Conclusion: We conclude from this study that the flexibility of the posterior chain may be related to the strength of the antagonists, however, when the two physical qualities were compared in the same muscles, it showed no correlation.

Download Full-text

Morphological Examination of a Herpes-type Virus Indigenous for Tree Shrews

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100067790 ◽

1970 ◽

Vol 28 ◽

pp. 160-161

Author(s):

J. P. Brunschwig ◽

R. M. McCombs ◽

R. Mirkovic ◽

M. Benyesh-Melnick

Keyword(s):

Electron Microscopy ◽

Soft Tissue ◽

Chick Embryo ◽

Soft Tissue Sarcoma ◽

Cell Cultures ◽

Tree Shrew ◽

Type Virus ◽

Morphological Examination ◽

Tree Shrews ◽

Embryo Cells

A new virus, established as a member of the herpesvirus group by electron microscopy, was isolated from spontaneously degenerating cell cultures derived from the kidneys and lungs of two normal tree shrews. The virus was found to replicate best in cells derived from the homologous species. The cells used were a tree shrew cell line, T-23, which was derived from a spontaneous soft tissue sarcoma. The virus did not multiply or did so poorly for a limited number of passages in human, monkey, rodent, rabbit or chick embryo cells. In the T-23 cells, the virus behaved as members of the subgroup B of herpesvirus, in that the virus remained primarily cell associated.

Download Full-text