Acquired hypophosphatemic rickets in a 13-year-old boy presenting with knee pain and valgus deformity

Improvement in genu valgus deformity in hypophosphatemic rickets due to primary de Toni-Debre-Fanconi syndrome treated with phosphate, calcitriol and alkali therapy

Bone Abstracts ◽

10.1530/boneabs.2.p26 ◽

2013 ◽

Author(s):

Bowden Sasigarn ◽

Patel Hiren ◽

Beebe Allan ◽

McBride Kim

Keyword(s):

Fanconi Syndrome ◽

Valgus Deformity ◽

Hypophosphatemic Rickets ◽

Alkali Therapy ◽

Genu Valgus Deformity

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Bilateral Pseudarthrosis of the Femoral Neck in a 25-Year-Old Male with Hereditary Hypophosphatemic Rickets

Case Reports in Orthopedics ◽

10.1155/2014/312712 ◽

2014 ◽

Vol 2014 ◽

pp. 1-3

Author(s):

Joris Anthonissen ◽

Christian Ossendorf ◽

Thomas Vetter ◽

Björn Habermann ◽

Pol M. Rommens

Keyword(s):

Surgical Treatment ◽

Femoral Neck ◽

Knee Pain ◽

Conservative Therapy ◽

Rare Disorder ◽

Hypophosphatemic Rickets ◽

Sport Activities

Hereditary hypophosphatemic rickets (HHR) is a rare disorder of renal phosphate wasting and the most common form of heritable rickets. Here, we report a case of an active 25-year-old male with HHR showing atraumatic bilateral femoral neck pseudarthrosis after 4 years of consecutive knee pain. A conservative therapy was administered, taking into account both the risks of surgical treatment and the little impairment even in the sport activities which the patient experienced.

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Anterior knee pain causes after total knee arthroplasty

Proceedings of the National Academy of Sciences of Belarus Medical series ◽

10.29235/1814-6023-2021-18-2-160-168 ◽

2021 ◽

Vol 18 (2) ◽

pp. 160-168

Author(s):

O. L. Eismont

Keyword(s):

Total Knee Arthroplasty ◽

Knee Pain ◽

Knee Arthroplasty ◽

Anterior Knee Pain ◽

Patellofemoral Joint ◽

Varus Deformity ◽

Valgus Deformity ◽

Total Knee ◽

Anterior Knee ◽

Average Angle

The objective of the study was to determine the causes of postoperative anterior knee pain after total knee arthroplasty for preventing its occurrence and improving the surgery results.The treatment results of 77 (112 cases) patients with cruciate-retaining total knee arthroplasty without patellar replacement were analyzed. The study involved 62 (80.5 %) women and 15 (19.5 %) men. The average age (Me (25‒75 %)) of the patients was 65 (60‒70) years. There were 97 cases (87 %) with varus deformity of the knee joint, 15 cases with valgus deformity (13 %). The average angle of varus deformity was 11.22 ± 3.81°, the average angle of valgus deformity was 11 ± 4.27°. After the anterior pain appeared, patients were examined in 2‒3, 4‒5 and 6‒7 months after surgery using clinical, X-ray (anterior-posterior, lateral and axial projections, topogram of lower extremities), and EMG methods.The causes of anterior postoperative knee pain were: implant components misplacement, patellar microcirculation disorders (chondrolysis, avascular necrosis due to circular patella denervation), patellofemoral joint imbalance, and functional causes. Pain manifested itself at active leg loading and knee motion because of implant components misplacement within 2‒3 months in 34 cases (94 %), 4‒5 months ‒ in 2 cases (6 %). Patellar microcirculation disorders within 4‒5 months ‒ in 5 cases (21 %), 6‒7 months ‒ in 19 (79 %) cases. Imbalance in the patellofemoral joint within 2‒3 months ‒ in 29 cases (69 %), 4‒5 months ‒ in 13 cases (31 %). Functional causes of pain appeared within 2‒3 months ‒ in 7 cases (70 %), 4‒5 months ‒ in 3 cases (30 %).The causes of postoperative anterior pain in total knee arthroplasty can be incorrect surgical technique, changes in patellar blood supply or in the biomechanics of the patellofemoral joint due to the imbalance of the thigh muscles.

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