Metric evaluation of the anterior nasal spine to estimate sex and population group in South African individuals.

Introduction: The anterior nasal spine is a pointed, midline projection of the maxilla. This bony structure dictates the overlying soft tissues providing the phenotypic features of the nose and upper lip and determines the differences in the mid-face morphology. Little data is available on the metric features of the Anterior nasal spine (ANS).

A quantitative CT analysis of fibula inlayed in a massive allograft for femoral diaphysis reconstruction.

Introduction: In diaphyseal reconstructions for bone tumor resection, massive bone allografts (MBA) are historically regarded as the gold standard. However, these are not without complications, and they present an elevated risk of infection, nonunion and structural failure that increases over time as the graft remains largely avascular. To counteract this disadvantage, a combination of allograft with a vascularized fibula has been proposed.

Temporary skin closure in extremity soft tissue sarcoma - our indications.

Introduction: Artificial skin replacements were developed to cover defects in general surgery or after burns. Their main indication in oncologic surgery is secondary resection of appropriate margins in skin tumors after incomplete primary excision. This is contraindicated in sarcomas where only wide excision is indicated.

Quality of life after extended pelvic exenterations.

Background: The aim of the study was to compare health-related quality of life (QoL) and oncological outcome between gynaecological cancer patients undergoing pelvic exenteration (PE) and extended pelvic exenteration (EPE). EPEs were defined as extensive procedures including, in addition to standard PE extent, the resection of internal, external, or common iliac vessels; pelvic side-wall muscles; large pelvic nerves (sciatic or femoral); and/or pelvic bones.

Methods: Data from 74 patients who underwent PE (42) or EPE (32) between 2004 and 2019 at a single tertiary gynae-oncology centre in Prague were analysed.

Chondrosarcomas of the small bones: analysis of 44 patients.

Background: Chondrosarcomas of the small bones of the hands and feet are uncommon and account for less than 2% of all chondrosarcomas in the skeleton; a 4.2% rate of malignant degeneration of enchondromas to secondary chondrosarcomas has been reported. We performed this study to assess the outcome of the patients with chondrosarcomas of the small bones.

Neoadjuvant Hypertermic Isolated Limb Perfusion in Treatment of Undifferentiated Spindle Cell Sarcoma of Lower Limb with Achieved Complete Pathologic Response.

Background: Hyperthermic isolated limb perfusion uses therapeutic effect of hyperthermia in the bounded compartment of the limb together with increased concentration of chemotherapy effect than what would be achieved in systemic application. Gold standard was melphalan (Alkeran) in combination with tasonermin (Beromun, tumor necrosis factor alpha). The efficacy of this combination has been demonstrated in limb soft tissue sarcomas and in patients with limb isolated bulky disease of malignant melanoma.

Chondroblastoma-like primary malignant giant cell tumor of the humerus - a case report.

35-year-old woman suffered prolonged pain in the left shoulder, where an aggressively growing tumor of the proximal humerus was revealed thereafter. The lesion caused massive osteolysis of the metaepiphysis with cortical disruption, but no soft tissue extension was evident. Given the unsatisfactory effect, the ongoing neoadjuvant chemotherapy was prematurely ceased and the resection 13 cm long segment of bone with modular prosthesis replacement followed.

[Osteoid Osteoma of the Upper Extremity].

PURPOSE OF THE STUDY Osteoid osteoma (OO) of the upper extremity is a rare pathology representing a major diagnostic challenge. The patients are often times incorrectly treated due to a misdiagnosis and therefore the final management of symptoms is delayed by several months. During this time the pain, which is the main symptom, increases.

Complex surgery for locally advanced bone and soft tissue sarcomas of the shoulder girdle.

Surgical management of primary musculoskeletal tumors of the shoulder girdle is cognitively and technically demanding. Over the last decades, advances in the medical treatments, imaging and surgical techniques have fostered limb salvage surgery and reduced the need for amputation. Despite well-accepted general principles, an individualized approach is often necessary to accommodate tumor extension, anatomical challenges and patient characteristics.

[Isolated Perfusion of the Upper Extremity with TNF-α - Double Venous Cannulation].

Background: The authors present a technical variation of the standard cannulation for cardiopulmonary bypass perfusion during hyperthermic isolated limb perfusion (ILP) procedures in selected patients with unresectable soft tissue sarcoma or malignant melanoma.

Patients: Of 55 ILP procedures performed at our institution since the procedure was established in 2009, nine were performed at the upper extremity. Standard single venous cannulation was used in five cases, and extended, double venous cannulation in the last four.

Autologous structural iliac bone grafts in reconstructions of short bone defects in the hand and foot after primary bone tumor resections: a single-institution retrospective study.

The use of structural autografts from the iliac crest for reconstruction of bony defects in the hand and foot was described by Wilson and Lance in 1965. However, very few series of this technique are published and long-term results are unknown. We present a single-institution series of 23 patients with a mean follow-up of 92 months.

The association of enchondromatosis with malignant transformed chondrosarcoma and ovarian juvenile granulosa cell tumor (Ollier disease).

Objective: Ovarian juvenile granulosa cell tumor has an interesting association with multiple enchondromatosis (Ollier disease and Maffucci syndrome) and should be considered a leading diagnosis when an ovarian mass is found in young patients with these conditions. Besides the association with nonskeletal malignancies, there is a high risk of malignant transformation of enchondroma in chondrosarcoma as was also the case in this instance.

Case Report: The report uses multiple images to document the representative and characteristic markers of multiple enchondromas in a 22-year-old patient with Ollier disease complicated by malignant transformation of chondrosarcoma and in whom the disease is associated with ovarian juvenile granulosa cell tumor of the right ovary.

[Periprosthetic Infection of the Knee Megaprosthesis following a Resection of Malignant Tumours around the Knee].

PURPOSE OF THE STUDY The study presents the monocentric retrospective study of a group of patients with malignant tumours around the knee, treated by a wide resection and a reconstruction with megaprosthesis due to infectious complications. Provided is a detailed analysis of each operative treatment due to the manifestation and process of periprostethic infection of the knee megaprosthesis and the use of external fixator during a two-stage revision. MATERIAL AND METHODS Between 01/1993 and 12/2013, a total of 67 cemented megaprostheses were assessed, with a detailed analysis of 12 patients with periprosthetic infection.

[Periosteal osteosarcoma - personal experience with five cases].

The authors present five cases of periosteal osteosarcoma located in the femur (4) and tibia (1) in children and young adults (1 female and 4 males) with an age range of 9 - 23 years (mean age 15 years). Radiographs in all cases showed a broad-based soft tissue mass attached to the cortex with periosteal reaction and in two of them cortical disruption with extensive medullary involvement. Follow-ups were available in four cases (range 11 - 73 months) and revealed pelvic metastasis after 15 months with ultimately rapid dissemination and death in a 9-year-old girl and metastasis to the humerus after 13 months in a 15-year-old boy.

[Radical surgery and intensive chemotherapy are necessary for successful treatment of osteosarcoma].

Background: We evaluated the therapeutic results in 44 patients (17 girls and 27 boys) with osteosarcoma from 1997 to 2006.Their average age was 12.8 years (2.

Local recurrence of giant cell tumor of bone after intralesional treatment with and without adjuvant therapy.

Background: The use of adjuvants after curettage has been well established for the treatment of giant cell tumor of bone. The purpose of this study was to analyze the rates of recurrence following different types of treatment as well as the influence of various factors of tumor presentation on those rates.

Methods: The data regarding benign giant cell tumors of the appendicular skeleton from ten bone tumor centers were evaluated.

Dedifferentiated chondrosarcoma: prognostic factors and outcome from a European group.

Background: Dedifferentiated chondrosarcoma has a very poor prognosis. Because of its rarity, there are few large studies of outcome which might identify potential prognostic factors. In particular there remains uncertainty about the value of chemotherapy for this condition.

Massive allografts in tumour surgery.

We offer our personal experience of the use of massive bone allografts after tumour resection. We demonstrate the long-term results from 71 patients (72 allografts) operated on between 1961 and 1990. The long-term survival rate in osteoarticular and intercalary grafts is around 60%.

[Classic adamantinoma, differentiated adamantinoma and osteofibrous dysplasia of long bones].

Background: Just for over 100 years, adamantinoma has been recognized as a primary enigmatic bone tumour with epithelial characteristics and predominantly involving the tibia. Several similarities between osteofibrous dysplasia has been recognised, differentiated adamantinoma and classic adamantinoma. The purpose of this study was to compare these lesions and to define their histogenesis and mutual relations.

Total hip replacement after tumor resection--30 years experience.

The authors report their experience with 161 cemented total hip replacements after tumor resections around the hip implanted between 1971 and 2001 in patients from aged 10 to 79 years. At first, the long stem Protek module was used and since 1980 the Czech made long stem Poldi endoprosthesis has been implanted. A cemented UHMW polyethylene cup has been used with both stems.

[Dedifferentiated chondrosarcoma of bone--report of 5 cases and literature review with emphasis on histogenesis].

Five cases of dedifferentiated chondrosarcoma of bone are presented. Three women and two men of age ranging from 57-72 years (median 63 years) suffered from tumors located in femur (2), scapula (1), humerus (1) and pelvis (1). They were all bulky tumors destroying the bones and infiltrating into the adjacent soft tissues in maximum diameter from 5-20 cm (median 12 cm).

[The tikhoff-linberg procedure.].

The Tikhoff-Linberg procedure represents one of the possibilities for treatment of extensive bone and soft tissue tumors in the shoulder region, and is a limb saving alternative to interscapulothoracic amputation. This procedure includes a resection of the proximal part of the humerus, a total scapulectomy, and a total or partial excision of the clavicula. The authors operated by this method in a time period of 26 years on eight patients.

Ossifying fibromyxoid tumor of soft parts: a report of 17 cases with emphasis on unusual histological features.

Ossifying fibromyxoid tumor of soft parts is an unusual benign neoplasm, with a tendency for local recurrence. Its typical microscopic appearance is that of a multinodular proliferation of round to spindle shaped cells separated by fibrous bands in which bone formation is often seen. Herein, we present the clinicopathologic features of 17 examples of this tumor with particular emphasis on some unusual histopathologic features that may place pitfalls in the diagnosis of this tumor, including satellite micronodules, mucinous microcysts, absence of myxoid areas, crush artifact, multiple microcalcifications, epidermoid cysts, atypical chondroid differentiation with binucleate lacunar cells, pericytic growth pattern, and malignant change.

Muscle-specific actin expression in chondroblastomas.

Chondroblastomas are unusual cartilage benign lesions of bone that have well-characterized histological features. We reviewed and immunohistochemically examined the paraffin block material of 20 cases, and in seven tumors of this collection we found distinct cytoplasmic muscle-specific actin positivity of some tumor chondroblasts and chondrocytes. Muscle-specific actin-positive cells had the histological and ultrastructural features typical of chondroblasts.

[Osteosarcoma - Clinical, Radiological and Histologic Evaluation of Preoperative Chemotherapy in Correlation with Long-term Survival.].

This paper evaluates the clinical, radiological and histomorphologic effect of neoadjuvant chemotherapy in 37 patients with II B osteosarcomas. The results are compared according to the type of surgery, local recurrence and lung metastasis at a minimal follow up of five years in patients who underwent surgery at the orthopedic clinic in Prague Bulovka in 1982 - 1992. All patients continued with adjuvant chemotherapy after surgery.