Results 51 to 60 of about 49,425 (253)

Fish eye optics [PDF]

open access: yes, 2017
We report on small student (high school) project of the Czech Academy of Sciences dealing with animal (fish) eyes and possible application in science and technology. Albeit most fishes have refractive eyes, the recent discoveries confirm that some fishes
Hudec R., Michalova S.
core   +1 more source

Torsion and Inflammation of Meckel's Diverticulum: Rare Cause of Acute Abdominal Pain [PDF]

open access: yes, 2017
Meckel's diverticulum is a remnant of the embryologic vitelline duct. It was named after its anatomical and embryological description, in the early 19th century, by Johann Meckel.
Alves, F   +4 more
core   +2 more sources

Inside a duck‐billed dinosaur: Vertebral bone microstructure of Huallasaurus (Hadrosauridae), Upper Cretaceous of Patagonia

open access: yesThe Anatomical Record, EarlyView.
Abstract Dinosaurs evolved a unique respiratory system with air sacs that contributed to their evolutionary success. Postcranial skeletal pneumaticity (PSP) has been used to infer the presence of air sac systems in some fossil archosaurs. While unambiguous evidence of PSP is well documented in pterosaurs and post‐Carnian saurischians, it remains absent
Tito Aureliano   +3 more
wiley   +1 more source

Zenker's diverticulum [PDF]

open access: yesQJM, 2008
An 86-year-old male with a background of pulmonary fibrosis and asthma was admitted to hospital with a six-month history of a productive cough. He produced approximately one teaspoon of white sputum per day but noticed that the cough was exacerbated significantly after eating dry food. At meal times he experienced slight dysphagia and coughed up …
McGrath, E E, McCabe, J, Odudu, A
openaire   +3 more sources

Osteological correlates of the respiratory and vascular systems in the neural canals of Mesozoic ornithurines Ichthyornis and Janavis

open access: yesThe Anatomical Record, EarlyView.
Abstract In birds, the neural canal houses a variety of anatomical structures including the spinal cord, meninges, spinal vasculature, and respiratory diverticula. Among these, paramedullary diverticula and the extradural dorsal spinal vein may leave behind osteological correlates in the form of pneumatic foramina and fossae, and a bilobed geometry of ...
Jessie Atterholt   +5 more
wiley   +1 more source

The role of fluoroscopy in diagnosing a Killian–Jamieson diverticulum

open access: yesJournal of Community Hospital Internal Medicine Perspectives, 2021
A Killian–Jamieson diverticulum is a ‘false’ diverticulum on the lateral side of the proximal cervical esophagus. They are much rarer than Zenker diverticula and can be difficult to diagnose.
A. Tagliaferri
doaj   +1 more source

Intraduodenal sarcoma recurrence of retroperitoneal origin: an unusual cause for a duodenal obstruction. [PDF]

open access: yes, 2012
Soft tissue sarcomas are uncommon tumors, and intraduodenal soft tissue sarcoma manifestation is even more rare. Only three cases of intraduodenal sarcomas have been reported in the literature thus far.
Bao, Jean J   +5 more
core   +1 more source

Re‐evaluation of a soft crested Edmontosaurin, with implications for hadrosaurid life appearance and diversity

open access: yesThe Anatomical Record, EarlyView.
Abstract Hadrosaurid dinosaurs are generally regarded as “crested” or “non‐crested” depending on the presence or absence of a bony cranial crest. At least one supposedly “non‐crested” hadrosaur is known to have possessed a soft tissue cranial crest (or comb), based on an exceptionally preserved “mummified” specimen. Here we redescribe this specimen and
Henry S. Sharpe   +4 more
wiley   +1 more source

Unusual Presentation of a Gastrointestinal Stromal Tumor in a Small Intestine Diverticulum

open access: yesCase Reports in Gastroenterology, 2021
A 50-year-old female with no significant medical history initially presented to an urgent care center with symptoms of acute onset abdominal pain, nausea, and emesis.
Mackenna Senti   +3 more
doaj   +1 more source

Primary osteosarcoma of bladder diverticulum mimicking intradiverticular calculus: a case report [PDF]

open access: yes, 2011
There is a well-documented relationship between urinary bladder diverticula and intradiverticular neoplasms. The great majorities of these tumors are urothelial carcinomas, but may also be of glandular or squamous type.
Igor Grubišić   +6 more
core   +1 more source

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