Corydalis sunhangii (Papaveraceae): A new species from Xizang, China, based on plastome and morphological data.

A new species of Papaveraceae, Corydalis sunhangii, in the section Trachycarpae, is described and illustrated from Nyingchi City, Xizang, China. The new species has some resemblance to Corydalis kingdonis, but differs by radical leaves prominent, usually several, blade tripinnate (vs. insignificant, few, blade bi- to triternate); cauline leaf usually one, much smaller than radical leaves, usually situated in lower half of stem (vs. usually two, larger than radical leaves, concentrated in upper third of stem); racemes densely 13-35-flowered (vs. rather lax, 4-11-flowered); claw of lower petal shallowly saccate (vs. very prominently and deeply saccate); capsule oblong, with raised lines of dense papillae (vs. broadly obovoid, smooth). Phylogenetic analysis, based on 68 protein-coding plastid genes of 49 samples, shows that C. sunhangii is not closely related to any hitherto described species, which is consistent with our morphological analysis.

Effects of Lateral Patellar Retinaculum Release for Recurrent Patella Dislocation: A Prospective Study.

PURPOSE: Recurrent patellar dislocation (RPD) is the most common complication of patellar instability and the medial patellofemoral ligament (MPFL) reconstruction has become its reference treatment. Lateral patellar retinaculum (LPR) release used to be performed in association with MPFL reconstruction. The aim of this study was to investigate the added values of MPFL reconstruction plus LPR release for RPD. METHODS: After Institutional Review Board approval, RPD patients from October 2014 to April 2019 were randomly assigned into two groups (isolated MPFL reconstruction [Group I] and MPFL reconstruction plus LPR release [Group II]) and prospectively assessed until 12 months after surgery. Knee joints with flexion of 20° were scanned by a 64-row CT scanner. Congruence angle (CA), patella tilt angle (PTA), lateral patellofemoral angle (LPFA), tibial tuberosity-trochlear groove distance and patellar tilt with the quadriceps relaxed and contracted were measured. Knee function was assessed by Lysholm knee score and International Knee Documentation Committee (IKDC) score. Patients were followed up for at least 12 months. RESULTS: A total of 87 RPD patients (45 for Group I and 42 for Group II) were selected in this study. Preoperative clinical characteristics were not significantly different across groups. No serious complications were noted in either group. It was statistically insignificant between the two group patients in terms of postoperative patella associated measurements (P > 0.05 for all). The Lysholm score and IKDC score of Group I (84.5 ± 7.1 and 87.9 ± 7.2) were significantly less than that of Group II (89.7 ± 8.7 and 93.1 ± 7.7), which indicated the better knee function of Group II. CONCLUSION: LPR release plus MPFL reconstruction provides additional benefits compared with isolated MPFL reconstruction in knee function. A combination of surgical treatments for RPD should be recommended.

Comparative study of three different combination surgical methods for recurrent patella dislocation.

PURPOSE: The effects of different combination of surgical techniques for recurrent patella dislocation (RPD) remain unclear. Thus, aim of this study was to investigate the surgical outcomes of different combination of surgical techniques for RPD. METHODS: The clinical data of 79 patients with RPD from August 2014 to October 2016 were analysed retrospectively. Knee joint was assessed according to measurements of the congruence angle (CA), patellar tilt angle (PTA) and lateral patellofemoral angle (LPFA). Knee function was evaluated by Kujala patellofemoral score, Lysholm knee score and Tegner score. Patients were followed up by out-patient examination and telephone till October 2018. RESULTS: Preoperative clinical characteristics were similar across groups. It was statistically insignificant among three groups in CA, PTA, LPFA and redislocation rate. In term of knee functions, the MPFL reconstruction and LPR release group had the highest score (Lysholm score: 91.82 ± 4.64, Kujala score: 94.22 ± 4.26, Tegner score: 5.80 ± 1.00, respectively) and the LPR release and MPR plication had the lowest score (Lysholm score: 78.10 ± 6.90, Kujala score: 80.91 ± 4.30, Tegner score: 4.98 ± 1.22, respectively). CONCLUSION: Three combinations of surgical methods were similar in terms of postoperative joint congruence and redislocation rate, but MPFL reconstruction combined with LPR release is worthy to be promoted with the highest knee function scores.

[Arthroscopic minimally invasive treatment of tibial intercondylar eminence fractures in children].

OBJECTIVE: To analyze the characteristics of children tibial intercondylar eminence fractures, and introduce arthroscopic minimally invasive techniques for the treatment of tibial intercondylar eminence fractures in children. METHODS: From January 2004 to December 2008, 12 children with tibial intercondylar eminence fractures were treated with cross Kirschner wire fixation after arthroscopic reduction. According to Meyers-McKeever classification systems, there were 1 case of type I, 4 cases of type II, and 7 cases of type III. There were 10 fresh and 2 old fractures in all. Among the patients, 10 patients were boy and 2 patients were girl,ranging in age from 8 to 13 years, with an average of 10 years. All the patients underwent arthroscopic exploration, reduction and fixation. During follow-up ranging from 10 to 36 months, the union of fracture, range of motion and stabilization of the knee were assessed. One patient was combined with lesions of the menisci, 1 patient with femoral trochlea cartilage injury, and 5 patients with meniscal entrapment under the bone. RESULTS: The heeling time averaged 5 weeks. No knee laxity or instability and no intercondylar notch impingement was detected in all cases at 3 months postoperatively. At same time, full range of motion of the affected knee returned, and the average Lysholm knee score was (92.7 +/- 2.5), the average Lysholm knee score was (96.4 +/- 1.7) at 6 months postoperatively. The Lachman test and ADT test was negative. CONCLUSION: The type II and type III tibial intercondylar eminence fractures occur frequently in children. Lesions of the menisci and cartilage occur seldom. The method of arthroscopic cross Kirschner wire fixation for the treatment of tibial intercondylar eminence fracture is easy to operate. Simultaneously, this technique is less invasive and allows early recovery. Also it coincidences with the characteristic rapid bone growth of children.