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Related Concept Videos

Metallic Solids02:37

Metallic Solids

20.6K
Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
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Structures of Solids02:22

Structures of Solids

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Solids in which the atoms, ions, or molecules are arranged in a definite repeating pattern are known as crystalline solids. Metals and ionic compounds typically form ordered, crystalline solids. A crystalline solid has a precise melting temperature because each atom or molecule of the same type is held in place with the same forces or energy. Amorphous solids or non-crystalline solids (or, sometimes, glasses) which lack an ordered internal structure and are randomly arranged. Substances that...
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Network Covalent Solids02:18

Network Covalent Solids

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Network covalent solids contain a three-dimensional network of covalently bonded atoms as found in the crystal structures of nonmetals like diamond, graphite, silicon, and some covalent compounds, such as silicon dioxide (sand) and silicon carbide (carborundum, the abrasive on sandpaper). Many minerals have networks of covalent bonds.
To break or to melt a covalent network solid, covalent bonds must be broken. Because covalent bonds are relatively strong, covalent network solids are typically...
16.1K
Molecular and Ionic Solids02:54

Molecular and Ionic Solids

20.0K
Crystalline solids are divided into four types: molecular, ionic, metallic, and covalent network based on the type of constituent units and their interparticle interactions.
Molecular Solids
Molecular crystalline solids, such as ice, sucrose (table sugar), and iodine, are solids that are composed of neutral molecules as their constituent units. These molecules are held together by weak intermolecular forces such as London dispersion forces, dipole-dipole interactions, or hydrogen bonds, which...
20.0K
Atomic Mass01:52

Atomic Mass

70.0K
Atoms — and the protons, neutrons, and electrons that compose them — are extremely small. For example, a carbon atom weighs less than 2 × 10−23 g. When describing the properties of tiny objects such as atoms, we use appropriately small units of measure, such as the atomic mass unit (amu). The amu was originally defined based on hydrogen, the lightest element, then later in terms of oxygen. Since 1961, it has been defined with regard to the most abundant isotope of carbon, atoms of which...
70.0K
Molecular Comparison of Gases, Liquids, and Solids02:26

Molecular Comparison of Gases, Liquids, and Solids

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Particles in a solid are tightly packed together (fixed shape) and often arranged in a regular pattern; in a liquid, they are close together with no regular arrangement (no fixed shape); in a gas, they are far apart with no regular arrangement (no fixed shape). Particles in a solid vibrate about fixed positions (cannot flow) and do not generally move in relation to one another; in a liquid, they move past each other (can flow) but remain in essentially constant contact; in a gas, they move...
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Laparoscopic Radical Left Pancreatectomy for Pancreatic Cancer: Surgical Strategy and Technique Video
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Diagnostic strategy with a solid pancreatic mass.

Giovanni Guarneri1, Giulia Gasparini1, Stefano Crippa2

  • 1Pancreas Translational & Clinical Research Center, San Raffaele Scientific Institute, Milan, Italy.

Presse Medicale (Paris, France : 1983)
|March 18, 2019
PubMed
Summary
This summary is machine-generated.

Diagnosing solid pancreatic masses requires a thorough work-up due to diverse possibilities. A clear diagnostic strategy ensures appropriate treatment selection for pancreatic adenocarcinoma and other conditions.

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Area of Science:

  • Gastroenterology and Hepatology
  • Diagnostic Imaging
  • Surgical Oncology

Background:

  • Solid pancreatic masses present a diagnostic challenge due to a wide range of potential causes.
  • Accurate diagnosis is critical as treatment strategies vary significantly based on the underlying pathology.

Purpose of the Study:

  • To outline a systematic diagnostic flowchart for evaluating patients with solid pancreatic masses.
  • To emphasize the importance of precise characterization of pancreatic lesions for optimal treatment planning.

Main Methods:

  • Analysis of clinical presentations, including asymptomatic and symptomatic cases.
  • Review of various imaging modalities (e.g., CT, MRI, EUS) and their role in differential diagnosis.
  • Discussion of complementary operative procedures and pathological examination.

Main Results:

  • Differentiation of solid pancreatic masses relies on a combination of clinical, imaging, and pathological findings.
  • Pancreatic adenocarcinoma requires specific diagnostic work-up to guide treatment modalities like chemotherapy, surgery, or medical therapy.

Conclusions:

  • A well-defined diagnostic work-up is paramount for accurate characterization of solid pancreatic lesions.
  • Tailoring treatment based on definitive diagnosis ensures the best patient outcomes for pancreatic masses.