scholarly journals Aggressive interactions between juvenile swordfishes and blue sharks in the Western Mediterranean: a widespread phenomenon?

2019 ◽  
Vol 20 (2) ◽  
Author(s):  
JAIME PENADÉS-SUAY ◽  
PABLO GARCÍA-SALINAS ◽  
JESÚS TOMÁS ◽  
FRANCISCO JAVIER AZNAR
Keyword(s):  
Computed Tomography ◽  
Western Mediterranean ◽  
Defensive Strategy ◽  
Blue Shark ◽  
Prionace Glauca ◽  
X Ray ◽  
Aggressive Interactions ◽  
Open Questions ◽  
Widespread Phenomenon ◽  
The Right

There are numerous reports of billfishes spearing objects, marine organisms, and even humans. Whether or not this behaviour is intentional and, if so, what is its functional meaning, are open questions. In 2016, an adult blue shark (Prionace glauca) was found to be killed by a juvenile swordfish (Xiphias gladius) in the western Mediterranean. Here we report on three more recent cases involving both species in the same area. In February 2017, an adult male blue shark was found stranded in Garrucha (Spain) with a fragment of a juvenile swordfish’s rostrum (18cm long x 2cm wide at proximal end) inserted in its cranium. In March 2017, an adult pregnant female blue shark was stranded alive on the coast of Ostia (Italy) but died shortly afterwards; a fragment of a juvenile swordfish’s rostrum (25x3cm) was found allocated between the eye and the cranium. Finally, in February 2018, an adult female blue shark appeared stranded in the coast of Vera (Spain), with a putative impalement injury anterior to the right eye but without an associated bill fragment. Surprisingly, X-ray and computed tomography revealed an older injury in the right nostril, with a small piece of a juvenile swordfish’s rostrum (5.3x1.2cm). These cases suggest that juvenile swordfish would drive their rostrum into blue sharks as a defensive strategy that is likely to be far from anecdotal. We suggest that no regular cases of these interactions are reported because they occur at high sea and evidence of them, when available, can easily be overlooked.

When prey becomes killer: does a double lethal attack on a blue shark reveal a precise defensive strategy in young swordfish?

2020 ◽  
Vol 100 (5) ◽  
pp. 831-836 ◽  
Author(s):  
Teresa Romeo ◽  
Pietro Battaglia ◽  
Domenico Macaluso ◽  
Giuseppe Tagliavia ◽  
Teresa Manuela Vicchio ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Mediterranean Sea ◽  
Rare Case ◽  
Defensive Strategy ◽  
Blue Shark ◽  
Prionace Glauca ◽  
Strait Of Sicily ◽  
Computed Tomography Scanning ◽  
The Right ◽  
Tomography Scanning

AbstractIn this paper a rare case of a double swordfish mortal attack against an adult blue shark (Prionace glauca) is reported. A female blue shark, with a total length of 3 m, was found stranded along the southern Sicilian coast (Strait of Sicily, Mediterranean Sea) on 30 May 2018. The analysis of this carcass revealed the presence of two swordfish bill fragments, impaled in the shark head; the former on the snout, the latter near the eye. The results of anatomical and computed tomography scanning analysis on the head of the blue shark showed that the larger bill fragment (19.7 cm) probably determined the death of this animal, having been impaled in a vital point, just behind the right eye. The analysis of both these events and other similar swordfish-shark interactions reported in the literature makes possible the hypothesis that young swordfish specimens put in place a precise defensive strategy against their potential predators or competitors, aimed at hitting vulnerable and vital points and delivering a mortal blow.

scholarly journals Deadly impalement of a blue shark Prionace glauca by a swordfish Xiphias gladius

2017 ◽  
Vol 18 (2) ◽  
pp. 340 ◽  
Author(s):  
J. PENADÉS-SUAY ◽  
J. TOMÁS ◽  
F. J. AZNAR
Keyword(s):  
Cause Of Death ◽  
Early Stage ◽  
Western Mediterranean ◽  
Defensive Strategy ◽  
Blue Shark ◽  
Prionace Glauca ◽  
Stage Of Development ◽  
Xiphias Gladius ◽  
Allometric Analysis ◽  
The Brain

In September, 2016, an adult female blue shark (Prionace glauca) 247 cm long stranded alive on the coast of Valencia (Spain, Western Mediterranean) but died shortly afterwards. The necropsy revealed ongoing pregnancy, with 65 embryos in early stage of development, and a healthy condition with no signs of starvation. Two fishing hooks surrounded by scarred tissue were detected in the mandible, indicating past interaction with fisheries. In addition, a fragment of the tip of a swordfish (Xiphias gladius) rostrum (length: 18 cm long, width: 0.5 cm (distal) and 3 cm (proximal)) was removed from the animal. The fragment had pierced the head producing an incision of 3.5 cm close to the left eye, crossing the head anterior to the pre-orbital process. No apparent damage was observed in the olfactory capsule or the eye, but the fragment had penetrated both sides of the skull causing extensive lesions in the brain, which were inferred to be the cause of death. Allometric analysis suggested that the swordfish was ca. 110 cm long, corresponding to a juvenile 1-2 yrs old. Swordfish had previously been reported driving their rostrum into pelagic sharks, allegedly as a defensive strategy. However, this is the first report of impalement as the direct cause of death in blue sharks.

scholarly journals Low-Dosed X-Ray Computed Tomography Imaging by Regularized Fully Spatial Fractional-Order Perona-Malik Diffusion

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Zhiwu Liao
Keyword(s):  
Computed Tomography ◽  
Fractional Order ◽  
Low Dose ◽  
Computed Tomography Imaging ◽  
Edge Preserving ◽  
X Ray ◽  
Good Ability ◽  
X Ray Computed ◽  
The Right ◽  
Low Dose Computed Tomography

Existing fractional-order Perona-Malik Diffusion (FOPMD) algorithms used in noise suppressing suffer from undesired artifacts and speckle effect, which hamper FOPMD used in low-dosed X-ray computed tomography (LDCT) imaging. In this paper, we propose a new FOPMD method for low-dose computed tomography (LDCT) imaging, which is called regularized fully spatial FOPMD (RFS-FOPMD), whose numerical scheme is also given based on Grünwald-Letnikov derivative (G-L derivative). Here, fully spatial FOPMD represents all the integer-order derivatives (IODs) in the right hand of Perona-Malik Diffusion (PMD) which are replaced by fractional-order derivatives (FODs). Since the new scheme has advantages of both regularization and FOPMD, it has good abilities in singularities preserving while suppressing noise. Some real sinogram of LDCT are used to compare the different performances not only for some classical but also for some state-of-art diffusion schemes. These schemes include PMD, regularized PMD (RPMD), and FOPMD in (Hu et al. 2012). Experimental results show that besides good ability in edge preserving, the new scheme also has good stability for iteration number and can avoid artifacts and speckle effect with suitable parameters.

Pericardial masses and congenital abnormalities

ESC CardioMed ◽  
2018 ◽  
pp. 1582-1584
Author(s):  
Angelos G. Rigopoulos ◽  
Hubert Seggewiss
Keyword(s):  
Computed Tomography ◽  
Surgical Management ◽  
Congenital Abnormalities ◽  
Benign Lesions ◽  
Chest Computed Tomography ◽  
X Ray ◽  
Wall Calcification ◽  
Chest X Ray ◽  
Pericardial Cysts ◽  
The Right

Pericardial masses include cysts, pericardial tumours, and pericardial haematomas. Pericardial cysts are benign lesions commonly located in the right cardiophrenic angle that remain typically asymptomatic and are incidentally found in chest X-ray or chest computed tomography but might cause pressure symptoms or become infected, thus requiring surgical management. Hydatid cysts due to echinococcosis are the most common acquired pericardial cysts, characterized by wall calcification, and indicate surgery.

scholarly journals Bronchial Leech Infestation in a 15-Year-Old Female

2016 ◽  
Vol 2016 ◽  
pp. 1-4
Author(s):  
Mohammad Ashkan Moslehi ◽  
Mohammad Hadi Imanieh ◽  
Ali Adib
Keyword(s):  
Computed Tomography ◽  
Foreign Body ◽  
Young Children ◽  
Lower Lobe ◽  
Foreign Body Aspiration ◽  
Ground Glass ◽  
Chest Computed Tomography ◽  
X Ray ◽  
Chest X Ray ◽  
The Right

Foreign body aspiration (FBA) is a common incidence in young children. Leeches are rarely reported as FBA at any age. This study describes a 15-year-old female who presented with hemoptysis, hematemesis, coughs, melena, and anemia seven months prior to admission. Chest X-ray showed a round hyperdensity in the right lower lobe. A chest computed tomography (CT) demonstrated an area of consolidation and surrounding ground glass opacities in the right lower lobe. Hematological investigations revealed anemia. Finally, bronchoscopy was performed and a 5 cm leech was found within the rightB7-8bronchus and removed by forceps and a Dormia basket.

scholarly journals Metastasis of Epidermoid Cervical Carcinoma Cell to The Orbit

2018 ◽  
Vol 12 (1) ◽  
pp. 31
Author(s):  
Widiastuti Widiastuti ◽  
Rachmi Fauziah Rahayu ◽  
Djoko Susianto ◽  
Rita Budianti ◽  
Heru Priyanto ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Cervical Cancer ◽  
Public Hospital ◽  
Compression Fracture ◽  
Abdominal Ultrasonography ◽  
X Ray ◽  
Metastatic Lesions ◽  
Normal Chest ◽  
Chest X Ray ◽  
The Right

Orbital metastases of cervical cancer cell are very rare. There is only one case reported in Dr. Moewardi Public Hospital Surakarta between 1999 and 2017. A 45-year-old woman was admitted with the upper right orbital lesion. She had not received a routine gynecologic examination for more than 10 years. She had normal chest X-ray. Abdominal ultrasonography revealed a heteroechoic lesion poor defined edge in cervix utery expands to corpus utery and rectum. Bilateral uropathy obstruction occured. Bone survey demonstrated osteolytic bone metastasis in the right supra orbital bone and a compression fracture of the twelfth thoracal spine. Head and orbital Computed Tomography (CT) scan, which revealed multiple metastatic lesions in the right orbital expanding to extra cranial, was performed. Our diagnosis was cervical cancer FIGO IV-B stage with distant metastasis thus chemoradiation was given. The aim of this report is to give more references regarding this complicated clinical condition.  ABSTRAKKanker serviks metastasis ke orbita sangat jarang terjadi. Hanya satu kasus yang dilaporkan di Rumah Sakit Umum Daerah Dr. Moewardi Surakarta antara tahun 1999 - 2017. Seorang wanita usia 45 tahun dirawat oleh karena lesi di orbita kanan atas sejak 2 bulan yang lalu. Pasien tersebut belum pernah mendapatkan pemeriksaan kandungan rutin selama lebih dari 10 tahun. Foto Chest X Ray normal. Ultrasonografi abdomen tampak lesi heteroekoik batas tak tegas pada serviks uterus meluas ke korpus uterus dan rektum. Terjadi obstruksi uropati kanan dan kiri. Bone survei memperlihatkan gambaran metastasis tipe litik pada tulang supra orbita kanan dan fraktur kompresi pada tulang belakang toraks ke dua belas. Computed Tomography (CT) Kepala dan Orbita memperlihatkan beberapa lesi metastasis pada supra orbita kanan yang meluas ke tulang tengkorak. Diagnosis kami adalah kanker serviks tahap FIGO IV-B dengan metastasis jauh dan diberikan therapi kemoradiasi. Tujuan penulisan ini adalah untuk memberikan lebih banyak referensi data tentang kondisi klinis yang rumit ini.

scholarly journals Macrodystrophia Lipomatosa Extending Into the Abdominal Wall and Breast: A Case Report

2020 ◽  
Author(s):  
Jian Liu ◽  
Jiaming Sun ◽  
Liang Guo ◽  
Zhenxing Wang ◽  
Nengqiang Guo
Keyword(s):  
Computed Tomography ◽  
Abdominal Wall ◽  
Lower Limb ◽  
Rare Case ◽  
Left Breast ◽  
Fatty Tissue ◽  
X Ray ◽  
Macrodystrophia Lipomatosa ◽  
One Year ◽  
The Right

Abstract BackgroundMacrodystrophia lipomatosa is a rare nonhereditary congenital gigantism, characterized by overgrowth of mesenchymal and fibro-adipose tissue, affecting one or more digits of the extremities. Here, we report a rare case of macrodystrophia lipomatosa of the entire right lower limb with extension of hypertrophied fatty tissue into the abdominal wall and breast. Case presentationA 32 years old woman was born with abnormally elongated and thickened right leg, and the condition aggravated gradually. The disease was multiple, including the right leg, right abdominal wall, and the left breast were also involved. The patient mainly complained that she was unable to walk but with the knee flexed. Physical examination revealed that the elongation and thickening was proportional to the left leg, and the involved joints were malformed and dysfunction. X-ray and Computed tomography angiography (CTA) showed the bones and vessels were elongated and thickened, and the joints were hypertrophic and swollen. Amputation, volume reduction and liposuction was performed on the lesions. Histological examination could see abnormal fibro-fatty tissue hyperplasia, the adipocytes were invasive, and part of muscles presented fat degeneration. The lesions showed no recurrence for one year after surgery.ConclusionAfter reviewing the literature of the macrodystrophia lipomatosa, we believed that our case was rare because the hypertrophied fatty tissue extended into the abdominal wall and breast, which was different from former studies and had not been documented worldwide. This novel case will further deepens the understanding of this disease, and will be useful for clinicians in diagnosing it.

scholarly journals Explosive Pleuritis

2001 ◽  
Vol 12 (2) ◽  
pp. 104-107 ◽  
Author(s):  
Jasdeep K Sharma ◽  
Thomas J Marrie
Keyword(s):  
Computed Tomography ◽  
Pleural Effusion ◽  
Respiratory Distress ◽  
Pleural Fluid ◽  
Case Definition ◽  
Pulmonary Tissue ◽  
X Ray ◽  
Mediastinal Shift ◽  
Chest X Ray ◽  
The Right

The objective of the present paper is to describe the clinical and computed tomography features of 'explosive pleuritis', an entity first named by Braman and Donat in 1986, and to propose a case definition. A case report of a previously healthy, 45-year-old man admitted to hospital with acute onset pleuritic chest pain is presented. The patient arrived at the emergency room at 15:00 in mild respiratory distress; the initial chest x-ray revealed a small right lower lobe effusion. The subsequent clinical course in hospital was dramatic. Within 18 h of admission, he developed severe respiratory distress with oxygen desaturation to 83% on room air and dullness of the right lung field. A repeat chest x-ray, taken the morning after admission, revealed complete opacification of the right hemithorax. A computed tomography scan of the thorax demonstrated a massive pleural effusion with compression of pulmonary tissue and mediastinal shift. Pleural fluid biochemical analysis revealed the following concentrations: glucose 3.5 mmol/L, lactate dehydrogenase 1550 U/L, protein 56.98 g/L, amylase 68 U/L and white blood cell count 600 cells/mL. The pleural fluid cultures demonstrated light growth of coagulase-negative staphylococcus and viridans streptococcus, and very light growth ofCandida albicans. Cytology was negative for malignant cells. Thoracotomy was performed, which demonstrated a loculated parapneumonic effusion that required decortication. The patient responded favourably to the empirical administration of intravenous levofloxacin and ceftriaxone, and conservative surgical methods in the management of the empyema. This report also discusses the patient's rapidly progressing pleural effusion and offers a potential case definition for explosive pleuritis. Explosive pleuritis is a medical emergency defined by the rapid development of a pleural effusion involving more than 90% of the hemithorax over 24 h, which causes compression of pulmonary tissue and mediastinal shift to the contralateral side.

scholarly journals The measurement of dorsal radial tilt by x-ray and computed tomography

2018 ◽  
Vol 64 (11) ◽  
pp. 1007-1011
Author(s):  
Jingning Li ◽  
Zhenjie Ma ◽  
Fei Gao ◽  
Yuan Ji
Keyword(s):  
Computed Tomography ◽  
Distal Radius ◽  
Distal Radius Fractures ◽  
The Other ◽  
Steel Plates ◽  
Radius Fractures ◽  
X Ray ◽  
Left And Right ◽  
The Right ◽  
Two Sides

SUMMARY OBJECTIVE: We conducted this study to define and measure the dorsal radial tilt, and to guide the reduction of distal radius fractures and the pre-bending of steel plates used in surgery. METHODS: The dorsal radial tilt was measured using both computed tomography (CT) and x-ray from both left and right side. The differences and correlations of the data measured by those two methods and from two sides were analyzed. RESULTS: The tilts measured by x-ray were significantly bigger than those measured by CT from the left side (t=55.51, p < 0.01) and from the right side (t=49.81, p < 0.01). The tilts measured by those two methods from the left and right sides were correlated (r=0.85, p < 0.01; r=0.81, p < 0.01). The dorsal radial tilts measured from the left side were not significantly different from those measured from the right side by CT (t=1.49, p > 0.05) and by x-ray (t=1.51, p > 0.05). The dorsal radial tilts measured from the left side by CT were significantly different from those measured from the right side by x-ray (t=43.07, p < 0.01), and these two sets of data were correlated (r=0.71, p < 0.01). The dorsal radial tilts measured from the left side by x-ray was significantly different from that measured from right side by CT (t=40.43, p < 0.01), and those two sets of data were also correlated (r=0.75, p < 0.01). Conclusions: The dorsal radial tilts measured from one side by one method can be used to estimate the tilts measured from the other side / the same side by the same method / the other method.

Reproductive parameters of blue shark, Prionace glauca, and other sharks in the Gulf of Guinea

1995 ◽  
Vol 46 (6) ◽  
pp. 967 ◽  
Author(s):  
JA Castro ◽  
J Mejuto
Keyword(s):  
Sex Ratio ◽  
Fork Length ◽  
Reproductive Parameters ◽  
Gulf Of Guinea ◽  
Blue Shark ◽  
Prionace Glauca ◽  
Embryo Number ◽  
The Mean ◽  
Gravid Females ◽  
The Right

In total, 1967 pelagic sharks of eight different species were sampled in waters of the Gulf of Guinea between June and August 1993 by commercial longline gear. Catches of Prionace glauca and Sphyma zygaena included a large number of pregnant females, making it possible to calculate some of their reproductive parameters. In total, 419 gravid females of P. glauca were caught, ranging in size from 170 to 260 cm fork length. The size at which 50% of females have embryos was determined to be 180 cm FL. Examination of the uteri from 128 of these females showed a higher number of embryos (59-60%) in the right uterus. The mean number of embryos was 37. Data on embryo size suggests that P. glauca may have a west-east migration to give birth along the Atlantic equatorial line. The embryonic sex ratio was 1 : 1. In the same catch there were 21 gravid females of S. zygaena. No difference in the number of embryos between uteri was found in this species. Mean embryo number was 33.5 and embryonic sex ratio was 1 : 1.

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