Periacetabular metastases: Proposed extension of the Harrington classification.

Objectives: To describe the functional outcomes, complications, and reconstruction types in patients with periacetabular metastases and to propose an extension of the Harrington classification.

Methods: Twenty-eight patients (13 males, 15 females) with a mean age of 63.8 ± 15.

Silent surface osteosarcoma treated following the hemi-capanna technique. A case report.

Introduction: surface sarcomas are a rare entity that need correct diagnosis to differentiate parosteal (cPOS), periosteal and the high grade surface osteosarcomas (HGSO). HGSO has malignant behavior similarities with osteosarcomas and wide resection is the key to a successful treatment.1 The Capanna and Hemi-Capanna reconstruction techniques have being developed in order to avoid amputation after an oncological resection, allowing structural support from an allograft and biological advantages from a vascularised autograft.

[Functional evaluation and quality of life in megaprostheses implanted by musculoskeletal tumors in the lower limb].

Introduction: radical resection is the surgical treatment of choice in musculoskeletal malignancies, which often settle in the pelvis and lower limbs. Megaprothesis reconstruction has been imposed in recent years as the gold standard in limb preservation surgery.

Material And Methods: descriptive retrospective study series of cases, including 30 patients operated between 2011 and 2019 of musculoskeletal pelvic and lower limb tumors at our institution that underwent limb-sparing reconstruction with the megaprosthesis.

Hidradenocarcinoma over a Surgically Excised Hidradenoma of the Foot. A Case Report of a Very Rare Presentation of a Rare Tumor.

Introduction: Hidradenocarcinomas are very rare and aggressive soft-tissue tumors, originated from sweat gland cells, which are located most frequently in head and neck, being their appearance at the extremities rare. This kind of tumor usually appears de novo and very few cases have been reported until now of appearance over benign lesions such as hidradenomas. Malignancy progression rate of hidradenomas is unknown, and this benign lesion has clinical and histopathological characteristics in common with hidradenocarcinomas that could lead to misdiagnosis.

Synovial Sarcoma of the Foot as an Atypical Cause of Persistent Metatarsalgia: A Report of 3 Cases.

Case: Three cases of atypical metatarsalgia are presented, all diagnosed with foot synovial sarcomas (SSs) at different stages of evolution, after a year of medical consultations. One case was treated with marginal excision without requiring bone excision; the second patient required amputation of the first ray; and the third patient, with advanced disease, required amputation through Chopart's joint.

Conclusion: Metatarsalgia is a recurrent reason for consultation in orthopaedics.

Orthopedic Surgical Treatment and Perioperative Complications in Multiple Myeloma Bone Disease: Analysis of a Series (2009-2018).

Background: More than 90% of patients with multiple myeloma (MM) develop lytic bone lesions that can be surgically treated for symptomatic relief and functional improvement.

Methods: This was a retrospective observational analytic study conducted between 2009 and 2018, including 58 patients with MM bone disease who underwent 77 orthopedic surgical procedures and were co-managed by internal medicine. Analysis of data related to MM bone disease, different modalities of surgical treatment, perioperative complications, and survival was performed.

[Aneurysmal bone cyst located on the acetabular roof in an 11-year-old male].

The aneurysmal bone cyst is a benign rare tumor, which usually develops during childhood and its more often found in limbs. The most accepted treatment consists in curetagge and filling with graft. However, certain locations may be inaccesible for surgery and represent therapeutical challenges.

A clinical review of 11 cases of large-sized well-differentiated liposarcomas.

Well-differentiated liposarcomas of the extremities are one of the most frequent types of malignant soft tissue tumors in adults. These tumors are typically locally aggressive and show a tendency to recurrence after surgical excision even though they do not metastasize and very rarely dedifferentiate. Its clinical presentation is generally a progressively growing mass causing aesthetic, functional, or compressive symptoms depending on the tumor's size and localization.

[Surgical treatment of malignant primary tumors of the pelvis on Ennekings zone II].

Introduction: Surgical treatment of malignant bone tumors of the pelvis with periacetabular involvement is constantly evolving. Even though acetabular reconstructions improve quality of life without impairing cancer control, they are not complication free. Our purpose is to describe the functional outcomes and surgical complications of different reconstructive techniques for Enneking zone II tumors.

Paraneoplastic vasculitis associated to pelvic chondrosarcoma: a case report.

Vasculopathic syndromes have been associated with hematological and solid organ malignancies. The pathogenesis of these syndromes remains largely unknown and there are no biologic markers identified. Whether it is or is not a paraneoplastic syndrome is under discussion, the close temporal relationship of cancer and vasculitis suggests that these vasculitides are a paraneoplastic condition.

[Treatment of a recalcitrant hip infection with a vastus lateralis muscle flap].

Background: Recalcitrant hip infection after arthroplasty presents a reconstructive challenge to orthopedic surgeons. The aim of this study is to evaluate the results with a vastus lateralis muscle flap used to treat these recalcitrant hip infections in our Department.

Material And Methods: A retrospective descriptive study was conducted on five patients with deep hip infections by transposition of the vastus lateralis muscle flap.

Management of infectious discitis. Outcome in one hundred and eight patients in a university hospital.

Purpose: The optimal management of pyogenic discitis is not agreed on. We conducted a retrospective, cross-sectional, observational study in which all patients with discitis who attended Hospital San Carlos Madrid from January 1999 to January 2009 were included.

Methods: We identified 108 consecutive adult patients with infectious discitis.

Diagnosis of infection in hip and knee revision surgery: intraoperative frozen section analysis.

Unlabelled: In this study we validated intraoperatively the analysis of polymorphonuclear leucocyte frozen sections for diagnosis of infection in hip and knee revisions. Between 1996 and 2002 we examined sections and cultured periprosthetic tissues in prosthetic revision in 170 cases, including 146 cases (83 hips and 63 knees). We assessed sensitivity (SE), specificity (SP), positive predictive value (PPV), negative predictive value (NPV), Youden index, positive likelihood ratio (PLR) and negative likelihood ratio (NLR).

Antegrade nailing for fractures of the distal femur.

Thirty-five fractures of the distal femur were treated by antegrade intramedullary nailing. All of the fractures were treated by a closed technique. In the cases in which there was extension of the fracture to the knee joint, the fracture initially was stabilized with percutaneous lag screws.