Chapter 057 Photosensitivity and Other Reactions to Light (Part 2) pps
Chapter 057. Photosensitivity and Other Reactions to Light (Part 2) pps
... the Soret band, around 400 nm (short visible), and to a lesser extent in the
Chapter 057. Photosensitivity and
Other Reactions to Light
(Part 2)
Molecular Targets for UVR-Induced Skin Effects ... factor,
prostaglandin E
2
, and tumor necrosis factor α. Local accumulation of these
cytokines occurs in sunburned skin, providing chemotactic factors that attract
ne...
Chapter 057. Photosensitivity and Other Reactions to Light (Part 1) pps
... penetrates to the dermis and is capable of altering
structural and matrix proteins that contribute to photoaging of chronically sun-
exposed skin, particularly in individuals of light complexion. ... between 290 and
Photosensitivity occurs when a photon-absorbing chemical (chromophore)
present in the skin absorbs incident energy, becomes excited, and transfers the
absorbed...
Chapter 057. Photosensitivity and Other Reactions to Light (Part 5) pps
...
Chapter 057. Photosensitivity and
Other Reactions to Light
(Part 5)
Polymorphous Light Eruption
After sunburn, the most common type of photosensitivity disease is
polymorphous light eruption ... exposure.
Phototoxicity and Photoallergy
These photosensitivity disorders are related to the topical or systemic
administration of drugs and other chemicals....
Chapter 057. Photosensitivity and Other Reactions to Light (Part 6) ppsx
... persistent photosensitivity is known as chronic
actinic dermatitis. These patients are typically elderly men with a long history of
Chapter 057. Photosensitivity and
Other Reactions to Light
(Part ... energy, become photoexcited,
generate ROS, and evoke cutaneous photosensitivity. The mechanism of porphyrin
photosensitization is known to be photodynamic, or oxygen...
Chapter 057. Photosensitivity and Other Reactions to Light (Part 7) docx
...
Fig. 57-1.
Figure 57-1
Chapter 057. Photosensitivity and
Other Reactions to Light
(Part 7)
Porphyria cutanea tarda is the most common type of human porphyria and
is associated with decreased ... include an acute photosensitivity
characterized by subjective burning and stinging of exposed skin that often
An algorithm for the diagnosis of a patient with photo...
Chapter 057. Photosensitivity and Other Reactions to Light (Part 8) pot
... dioxide 25
Chapter 057. Photosensitivity and
Other Reactions to Light
(Part 8)
Natural photoprotection is provided by structural proteins in the epidermis,
particularly keratins and melanin. ... effects of long-term UV-B phototherapy
and PUVA photochemotherapy mimic those seen in individuals with chronic sun
exposure and include skin dryness, actinic keratoses,...
Chapter 057. Photosensitivity and Other Reactions to Light (Part 3) doc
... including the face, the neck, and the hands. Major
risk factors include male sex, childhood sun exposures, older age, fair skin, and
residence at latitudes closer to the equator. Whites of darker complexions ... but this is likely due to failure to control for confounding
factors such as sunscreen stability and frequency of application. Since no
prospective studies are availab...
Chapter 027. Aphasia, Memory Loss, and Other Focal Cerebral Disorders (Part 2) pptx
... alive?") help to assess the ability to comprehend complex
syntactic structure. Commands to close or open the eyes, stand up, sit down, or roll
over should not be used to assess overall ... attention span. Otherwise, the
failure of repetition becomes a reflection of the narrowed attention span rather
Chapter 027. Aphasia, Memory Loss, and
Other Focal Cerebral Disorders...
Chapter 027. Aphasia, Memory Loss, and Other Focal Cerebral Disorders (Part 11) pps
... Chapter 027. Aphasia, Memory Loss, and
Other Focal Cerebral Disorders
(Part 11)
The Occipitotemporal Network for Face and Object Recognition:
Prosopagnosia and Object Agnosia ... association areas of occipitotemporal cortex and then to other heteromodal
and paralimbic areas of the cerebral cortex. Bilateral lesions in the fusiform and
lingual gyri of the occipitot...
Chapter 140. Infections Due to the HACEK Group and Miscellaneous Gram-Negative Bacteria (Part 2) ppsx
... mg/kg per day in 3 divided doses for 2–4 weeks).
Chapter 140. Infections Due to the HACEK Group
and Miscellaneous Gram-Negative Bacteria
(Part 2)
Kingella kingae
Because of improved microbiologic ... age; staphylococcal and streptococcal species remain most prevalent.
Invasive K. kingae infections with bacteremia are associated with upper
respiratory tract infections an...
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