scholarly journals Collisional formation of massive exomoons of superterrestrial exoplanets

2020 ◽  
Vol 492 (4) ◽  
pp. 5089-5101 ◽  
Author(s):  
Uri Malamud ◽  
Hagai B Perets ◽  
Christoph Schäfer ◽  
Christoph Burger
Keyword(s):  
Rare Case ◽  
Multiple Impacts ◽  
Detection Capability ◽  
Giant Impacts ◽  
Large Phase ◽  
Hit And Run ◽  
Planetary Impacts ◽  
Impact Models

ABSTRACT Exomoons orbiting terrestrial or superterrestrial exoplanets have not yet been discovered; their possible existence and properties are therefore still an unresolved question. Here, we explore the collisional formation of exomoons through giant planetary impacts. We make use of smooth particle hydrodynamical collision simulations and survey a large phase space of terrestrial/superterrestrial planetary collisions. We characterize the properties of such collisions, finding one rare case in which an exomoon forms through a graze and capture scenario, in addition to a few graze and merge or hit and run scenarios. Typically however, our collisions form massive circumplanetary discs, for which we use follow-up N-body simulations in order to derive lower limit mass estimates for the ensuing exomoons. We investigate the mass, long-term tidal-stability, composition and origin of material in both the discs and the exomoons. Our giant impact models often generate relatively iron-rich moons that form beyond the synchronous radius of the planet, and would thus tidally evolve outward with stable orbits, rather than be destroyed. Our results suggest that it is extremely difficult to collisionally form currently-detectable exomoons orbiting superterrestrial planets, through single giant impacts. It might be possible to form massive, detectable exomoons through several mergers of smaller exomoons, formed by multiple impacts, however more studies are required in order to reach a conclusion. Given the current observational initiatives, the search should focus primarily on more massive planet categories. However, about a quarter of the exomoons predicted by our models are approximately Mercury-mass or more, and are much more likely to be detectable given a factor 2 improvement in the detection capability of future instruments, providing further motivation for their development.

scholarly journals Juvenile Aggressive Trabecular Ossifying Fibroma of Mandible: A Rare Case Report

2016 ◽  
Vol 6 (1) ◽  
pp. 45-51
Author(s):  
Deepa Das Achath ◽  
Abhishek Sanjay Ghule ◽  
Preeti Kanchan-Talreja ◽  
Sunanda Bhatnagar
Keyword(s):  
Case Report ◽  
Rare Case ◽  
Histological Analysis ◽  
High Recurrence Rate ◽  
Ossifying Fibroma ◽  
Appropriate Treatment ◽  
Juvenile Ossifying Fibroma ◽  
Rare Case Report

ABSTRACT Fibroosseous lesions of the jaws, including juvenile ossifying fibroma (JOF), pose diagnostic and therapeutic difficulties due to their clinical, radiological, and histological variability. There are two histological varieties of it, one as psammomatoid type and second as trebacular type; here, we present a trebacular type, which is a rare variety. After the clinical examination, radiological and histological analysis, it was diagnosed as juvenile trebacular ossifying fibroma. Although JOF is an uncommon clinical entity, its aggressive local behavior and high recurrence rate means that it is important to make an early diagnosis, apply the appropriate treatment, and, especially, follow-up the patient over the long term. How to cite this article Ghule AS, Achath DD, Kanchan- Talreja P, Bhatnagar S. Juvenile Aggressive Trabecular Ossifying Fibroma of Mandible: A Rare Case Report. J Contemp Dent 2016;6(1):45-51.

Successful repair of critical tricuspid regurgitation secondary to ruptured papillary muscle in a newborn

2004 ◽  
Vol 14 (4) ◽  
pp. 450-452 ◽  
Author(s):  
Kyoung Ah Lim ◽  
June Huh ◽  
Tae-Gook Jun
Keyword(s):  
Papillary Muscle ◽  
Tricuspid Regurgitation ◽  
Rare Case ◽  
Term Result ◽  
Short Term ◽  
Low Cardiac Output ◽  
Short Term Result ◽  
Long Term Follow Up

We report a rare case of an isolated critical tricuspid regurgitation due to rupture of a papillary muscle. This patient presented with a cyanosis immediately after birth. Despite mechanical ventilation and medical management to decrease the pulmonary vascular resistance, the low cardiac output persisted, along with the cyanosis. Repair of the tricuspid valve was performed, using an artificial tendinous cord, on the 4th day of life. The short-term result of the surgery is satisfactory, but the patient requires long-term follow-up.

scholarly journals Coronary Artery Fistulas: Symptoms may not Correlate to Size. An Emblematic Case and Literature Review.

2015 ◽  
Vol 4 ◽  
pp. 79 ◽  
Author(s):  
Dario Buccheri ◽  
Calogera Pisano ◽  
Davide Piraino ◽  
Bernardo Cortese ◽  
Paola Rosa Chirco ◽  
...  
Keyword(s):  
Coronary Artery ◽  
Literature Review ◽  
Coronary Arteries ◽  
Rare Case ◽  
Surgical Ligation ◽  
Long Term Follow Up ◽  
Coronary Artery Fistulas ◽  
Coronary Steal

<p>Coronary artery fistulas are rare anatomic abnormalities of the coronary arteries present in 0.002% of the general population and represent 14% of all anomalies of coronary arteries. Their clinical relevance focuses mainly on the mechanism of "coronary steal phenomenon”, causing myocardial functional ischemia even in the absence of stenosis, hence common symptoms are angina or dyspnea. Small size fistulas are mostly asymptomatic and have excellent prognosis if managed medically with regular follow-up consisting also in echocardiography every 2-5 years. Big-sized and symptomatic fistulas, on the contrary, should undergo invasive closure, either with a transcatheter approach or with surgical ligation, whose results are equivalent at long-term follow-up. However, in some cases, symptoms may not correspond with size. Larger fistulas may be asymptomatic and very small fistulas may cause symptoms like angina in our patient. Here, we are presenting an emblematic and very rare case with a complete literature review. Particularly, very didactic angiography images and then during surgery are shown. </p>

scholarly journals An extremely rare case of testicular malign neoplasm; alveolar subtype of rhabdomyosarcoma with long term follow-up.

2014 ◽  
Vol 4 (2) ◽  
pp. 134-135
Author(s):  
Tumay Ipekci ◽  
Yigit Akin ◽  
Burak Hoscan ◽  
Ahmet Tunckiran
Keyword(s):  
Germ Cell ◽  
Rare Case ◽  
Clinical Findings ◽  
Testicular Neoplasm ◽  
Solid Organ ◽  
Germ Cell Tumours ◽  
Long Term Follow Up ◽  
Solid Organ Tumours

Testicular neoplasm usually occur in men aged between 15 and 35. These are solid organ tumours and also should be operated when there is a suspicious clinical findings. Testis tumours are levelled after histopathology evaluation. The medical, surgical and follow-up strategies of well know testis tumours, such as seminomas, non-seminom germ cell tumours, have been established. In case of testis tumours rare entities may occur as rhabdomyosarcoma.We here presented a rare case of   alveolar subtype of rhabdomyosarcoma in testis with long term follow-up.

scholarly journals Rare Case of Adult Langerhans Cell Histiocytosis: A Case Report

2019 ◽  
Vol 13 (1) ◽  
pp. 17
Author(s):  
Dinny Gustina Prihadi ◽  
Agung Firmansyah Sumantri ◽  
Hasyarati Agustina ◽  
Indra Wijaya
Keyword(s):  
Case Report ◽  
Langerhans Cell Histiocytosis ◽  
Rare Case ◽  
Malignant Tumors ◽  
Corticosteroid Injection ◽  
Langerhans Cell ◽  
Intralesional Corticosteroid ◽  
Adult Male Patient

Background: Langerhans Cell Histiocytosis (LCH) is a disease characterized by proliferation and infiltration of histiocytes in various organs that is caused by local or systemic effects. LCH could affect bones, lungs, central nervous system, liver, thymus, skin, and lymph nodes. The diagnosis of LCH is difficult to enforce and rarely found in adults, namely 1-2 cases per million per year.Case Presentation: In Indonesia, there were very few cases of LCH in adults, one of which was found in women aged 56 years. LCH does not yet have standard treatments. The treatment is given based on location and severity, including intralesional corticosteroid injection, radiotherapy, surgical or excision curettage, and chemotherapy. Prednisone and vinblastine chemotherapy was one of chemotherapy that is given to LCH patients. Prognosis of LCH consists of various factors, one of which is the number of organs involved. This is a case report of LCH in an adult male patient with skin involvement who received chemotherapy for 6 weeks and experienced improvement.Conclusions: LCH is not only a disease of children; it is also reported in an adult. The prognosis is related to the number of organ involved and involvement of the risk organ. LCH can recur easily and accompany malignant tumors, so follow-up and long-term observations are still needed to be done.

scholarly journals Thoracoscopic and laparoscopic resection of a huge oesophageal liposarcoma: a case report

2021 ◽  
Vol 49 (9) ◽  
pp. 030006052110412
Author(s):  
Rui Li ◽  
Chen Lin ◽  
Yuxun Huang ◽  
Liang Cao ◽  
Rui Hu ◽  
...  
Keyword(s):  
Case Report ◽  
Minimally Invasive ◽  
Rare Case ◽  
Laparoscopic Resection ◽  
Polypoid Mass ◽  
Current Case ◽  
Long Term Follow Up ◽  
History Of

Oesophageal liposarcomas are particularly rare, accounting for 1.2–1.5% of all gastrointestinal liposarcomas. Surgical resection is the usual treatment. Endoscopic resection is minimally invasive but still controversial. This current case report describes a rare case of a large oesophageal liposarcoma in a 52-year-old male that presented with 10-year history of dysphagia for dry and solid food that was exacerbated by a recent common cold. Thoracoscopic and laparoscopic oesophagectomy was performed. He did not have any dysphagia or dyspnoea 1 week postoperatively. The excised specimen consisted of a polypoid mass measuring 21.0 cm × 5.1 cm. Histological examination confirmed that it was an oesophageal liposarcoma. At 1-year postoperatively, there was no sign of recurrence. Thoracoscopy and laparoscopy can be used to treat large oesophageal masses. Long-term follow-up is required as oesophageal liposarcomas tend to recur.

Mesenteric Artery Stenosis Presenting as Severe Erosive Gastroduodenitis: A Rare Case Report With Long Term Follow-Up

2015 ◽  
Vol 6 (4) ◽  
pp. 194-196
Author(s):  
Ramesh Dwarakaprasad ◽  
Huliyurdurga Srinivasa Setty Natraj Setty ◽  
Kumarswamy X ◽  
Sunil Kumar ◽  
Guruprasad X ◽  
...  
Keyword(s):  
Case Report ◽  
Mesenteric Artery ◽  
Rare Case ◽  
Artery Stenosis ◽  
Rare Case Report ◽  
Long Term Follow Up ◽  
Mesenteric Artery Stenosis

Isolated Dorsal Dislocation of the Second Metatarsophalangeal Joint

Foot & Ankle ◽  
1980 ◽  
Vol 1 (1) ◽  
pp. 30-32 ◽  
Author(s):  
Jerome L. Murphy
Keyword(s):  
Rare Case ◽  
Metatarsophalangeal Joint ◽  
Mechanism Of Injury ◽  
Long Term Follow Up

A rare case of dorsal dislocation of the second metatarsophalangeal joint is presented with diagnosis, treatment, and long-term follow up evaluation. The unusual mechanism of injury and obstacle to reduction are described.

A rare case of spontaneous bladder rupture in bladder extrophy

1996 ◽  
Vol 63 (1_suppl) ◽  
pp. 63-64
Author(s):  
G. Marino ◽  
R. Cevoli ◽  
E. Pugno ◽  
V. Cocimano
Keyword(s):  
Rare Case ◽  
Bladder Augmentation ◽  
Bladder Rupture ◽  
Spontaneous Bladder Rupture ◽  
Functional Factors

The authors report a rare case of spontaneous bladder rupture in a 13-year-old girl who underwent functional closure for bladder extrophy. Although bladder rupture can happen in operations for bladder augmentation, it is very rare in the above cases. The pathogenesis of this complication due to anatomical and functional factors is analysed, emphasising the need for careful long-term urologic follow-up.

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