Intraosseous ganglion cyst mimicking chondrosarcoma on MRI: a case report

Background The intraosseous ganglia is a benign cyst, rarely locate in the olecranon process. As intraosseous ganglia can mimic malignant bone tumor, computed tomography (CT) is important for diagnosis even when magnetic resonance imaging (MRI) suggests malignant bone tumor, such as chondrosarcoma. Case presentation In this paper, we report a 42-year-old woman with intraosseous ganglia in the olecranon process of the ulna. She complained pain in right elbow for 3 weeks. MRI revealed an intraosseous mass which initially diagnosed as chondrosarcoma. However, followed computed tomography (CT) demonstrated scattered intralesional gas and no underlying mineralization, and we can exclude chondrosarcoma from diagnosis. Conclusions The intraosseous ganglia can mimic bone tumor in MRI; therefore, CT is essential for accurate characterization of bone tumor. Even if MR imaging strongly suggests chondrosarcoma of the bone, CT should be performed as additional study.

Short-term functional results of surgical management of fractures of olecranon process of ulna by locking hook plate

<p class="abstract"><strong>Background:</strong> The aim was to study functional results of fixation of fractures of olecranon process of ulna by locking hook plate.</p><p class="abstract"><strong>Methods:</strong> The study was conducted on 30 patients who underwent fixation of olecranon fracture by locking hook plate in department of orthopaedics, GMCH Aurangabad from September 2018 to September 2020. Patients were assessed functionally using Mayo elbow performance score and radiologically using serial follow up radiographs of elbow.<strong></strong></p><p class="abstract"><strong>Results:</strong> At 2 year follow up of 30 patients of all types of olecranon fracture treated by locking hook plate, no patient had evidence of non-union or loss of reduction or any other major complications. In our study 21 patients (70%) showed excellent results, 6 patients (20%) showed good results and 3 patients (10%) showed fair results. None of the patients in our study showed poor results. 3 patients (10%) had superficial infection which were treated by adequate antibiotics after doing culture and sensitivity testing and 4 patients (13.33%) had symptomatic metal prominence which underwent implant removal after union of fracture.</p><p><strong>Conclusions:</strong> Fixation of all types of fractures of olecranon by locking hook plate is good alternative to other methods of fixation like tension band wiring, intramedullary fixation using screw tension band wiring which are used only in selected cases. In our study we conclude that locking hook plate is excellent modality of treatment for all types of fractures of olecranon, it gives excellent functional and radiological outcome with minimal complication and stable fixation of all types of fractures including transverse as well as comminuted fractures.</p>

MORPHOMETRIC STUDY OF OLECRANON PROCESS AND TROCHLEA OF HUMERUS IN ADULT POPULATION OF TELANGANA REGION.

Introduction: Morphometric study of Olecranon process and Trochlea of humerus in Adult population of Telangana region. Materials And Methods: The study was done on 120 dry Adult Humerus of unknown age and sex collected from the Department of Anatomy, Kakatiya Medical College, Warangal, Telangana state. Results: Maximum width of Right and Left Olecranon process of humerus were 30mm and 34 mm respectively while the minimum width of olecranon process of humerus were 22mm on right and 24mm on left side. Mean width of olecranon process of humerus were 26 mm on right side, 29 mm on left side . Maximum length of Right and Left Olecranon process of humerus were 20mm and 20 mm respectively while the minimum length of olecranon process of humerus were 15mm onright and 16 on left side. Mean length of Olecranon process of humerus were 17.5 mm on right side, 18 mm on left side . Maximum width of right and left Trochlear process of humerus were 30mm and 30 mm respectively while the minimum width of width of right and left trochlear process of humerus were 18mm onright and 22 on left side. Mean width distance of trochlea of humerus were 24 mm on right side, 26 mm on left side. Conclusion: The knowledge of Morphometric study of Olecranon process and Trochlea of humerus is important for anatomists, It is also helpful for orthopaedic surgeons in distal end fracture of humerus and its reconstructive surgery for various implants.

Intraosseous Ganglion Cyst Mimicking Chondrosarcoma On MRI: A Case Report

BackgroundThe intraosseous ganglia is a benign cyst, rarely locate in the olecranon process. As intraosseous ganglia can mimic malignant bone tumor, computed tomography (CT) is improtant for diagnosis even when magnetic resonance imaging (MRI) suggests malignant bone tumor such as chondrosarcoma.Case presentationIn this paper, we report a 42-year-old woman with intraosseous ganglia in the olecranon process of the ulna. She complained pain in right elbow for 3 weeks. MRI revealed an intraosseous mass which initially diagnosed as chondrosarcoma. However, followed computed tomography (CT) demonstrated scattered intralesional gas and no underlying mineralization, and we can exclude chondrosarcoma from diagnosis. ConclusionsThe intraosseous ganglia can mimic bone tumor in MRI, therefore CT is essential for accurate characterization of bone tumor. Even if MR imaging strongly suggests chondrosarcoma of the bone, CT should be performed as additional study.

A new ankylosaurid skeleton from the Upper Cretaceous Baruungoyot Formation of Mongolia: its implications for ankylosaurid postcranial evolution

A new articulated postcranial specimen of an indeterminate ankylosaurid dinosaur from the Upper Cretaceous (middle-upper Campanian) Baruungoyot Formation from Hermiin Tsav, southern Gobi Desert, Mongolia includes twelve dorsal vertebrae, ribs, pectoral girdles, forelimbs, pelvic girdles, hind limbs, and free osteoderms. The new specimen shows that Asian ankylosaurids evolved rigid bodies with a decreased number of pedal phalanges. It also implies that there were at least two forms of flank armor within Ankylosauridae, one with spine-like osteoderms and the other with keeled rhomboidal osteoderms. Unique anatomical features related to digging are present in Ankylosauridae, such as dorsoventrally flattened and fusiform body shapes, extensively fused series of vertebrae, anteroposteriorly broadened dorsal ribs, a robust humerus with a well-developed deltopectoral crest, a short robust ulna with a well-developed olecranon process, a trowel-like manus, and decreased numbers of pedal phalanges. Although not fossorial, ankylosaurids were likely able to dig the substrate, taking advantage of it for self-defence and survival.

Aluminium Splint Incorporated Fibreglass Cast Preserves Limb Function in Bovines with Olecranon Fracture

Objective Olecranon process fractures are rare in bovines. The aim of the study was to put on record satisfactory limb usage in cattle and buffaloes suffering from olecranon fractures and treated conservatively, primarily for carpal contracture or to prevent it, using aluminum splints incorporated within a fiberglass cast along with stall confinement. Study Design This one year study included 19 olecranon fractures in bovines (15 buffaloes and 4 cattle). Out of 19, 12 bovines (9 buffaloes and 3 cattle) were treated primarily to manage the associated carpal contracture, using external coaptation of aluminium splints incorporated within a fiberglass cast for 6 to 8 weeks. The owners of the remaining 7 bovines (6 buffaloes and 1 bullock) were only advised to keep their animal in stall-confinement, due to various reasons. Results Slipping and falling on hard surfaces was the primary aetiology of olecranon fractures (17/19). Most of the fractures (14/19) were presented more than 10 days after a traumatic event, with a mean duration of 24.0 ± 26.6 days. On follow up, all the treated bovines showed satisfactory limb usage whereas all stall-confined buffaloes showed no improvement. Conclusion Slipping and falling on hard surfaces is a common cause of olecranon fracture in bovines. Olecranon fractures associated carpal contracture can be successfully treated/prevented by applying full limb cast (if possible including elbow) along with aluminum splints leading to satisfactory limb usage in bovines. Further it is concluded that stall confinement alone is insufficient to prevent limb contracture (which usually develops with olecranon fracture in bovines) leading to permanent non-weight bearing disability.

Ulna and radius

Descriptions of all radial and ulnar fossils from Sterkfontein are presented. The relatively large sample of forelimb bones from Sterkfontein provide information about the elbow, wrist, and forearm of Australopithecus africanus. The proximal orientation of the olecranon process and anterior orientation of the trochlear notch suggest that the forelimb was used in flexed position, as in humans. The bones are small relative to other hominins, and have relatively straight diaphysis and small muscle attachment markings like other australopiths, suggesting the presence of reduced forearm muscularity relative to apes. Diaphyseal cross-sectional shape suggests a pattern of forearm muscle use that may be neither completely human-like nor ape-like but somewhat intermediate, perhaps reflecting a reduced use in locomotion and an increased use in manipulation. In contrast to the diaphysis, the proximal radius is more clearly ape-like, with beveled heads and constricted and relatively long necks comparable to the Hadar specimens, which underscores the unique morphology of the elbow (neither completely human-like nor ape-like) in these hominins. The distal ulna, with the well-marked tendon groove, deep fovea, and a head shape intermediate between apes and humans, like A. afarensis specimens, suggest that stability was required during loading and use of the hand and wrist, although possibly less so than in extant apes. The overall picture of the Sterkfontein forelimb is that of a taxon that had powerful arms, but less powerful than apes, and that they were using them for tasks such as manipulation and probably less so for locomotion.