0
We're unable to sign you in at this time. Please try again in a few minutes.
Retry
We were able to sign you in, but your subscription(s) could not be found. Please try again in a few minutes.
Retry
There may be a problem with your account. Please contact the AMA Service Center to resolve this issue.
Contact the AMA Service Center:
Telephone: 1 (800) 262-2350 or 1 (312) 670-7827  *   Email: subscriptions@jamanetwork.com
Error Message ......
skINsight |

Flash-Powered Transilllumination:  Old Concept, New Technology

Calogero Pagliarello, MD, PhD; Andrea Paradisi, MD, PhD; Caterina Dianzani, MD, PhD; Mauro Paradisi, MD; Paolo Persichetti, MD, PhD
Arch Dermatol. 2012;148(5):1. doi:10.1001/archdermatol.2011.2275.
Text Size: A A A
Published online

Extract

Transillumination refers to the use of transmission of light through the body to distinguish between cystic and solid masses. It can therefore provide useful clues for diagnostically challenging hand lesions, because the treatment of solid hand neoplasms1 differs considerably from that of myxoid cysts.2

The penlight3 is usually too weak to serve as a diagnostic aid, even when the room lights are dimmed. An electronic flash unit placed under the affected finger and synchronized with the camera through cable permits the capture of a detailed picture of subcutaneous lesions in broad daylight, even in dark-skinned patients. Transillumination of a straightforward myxoid cyst (Figure, A) allows more light to pass through, resulting in lucent-filling defects (Figure, B). The same pattern (Figure, D and F), obtained for clinically doubtful lesions (Figure, C and E), easily confirms their cystic nature, whereas solid masses (Figure, G [giant cell tumor of tendon sheath]) produce an area of increased opacity (Figure, H). Anatomical considerations limit the usefulness of this technique to suspicious skin lesions on the fingers.

Figures in this Article

Sign in

Create a free personal account to sign up for alerts, share articles, and more.

Purchase Options

• Buy this article
• Subscribe to the journal

First Page Preview

View Large
First page PDF preview

Figures

Place holder to copy figure label and caption
Graphic Jump Location

Figure.

Tables

References

Correspondence

CME
Meets CME requirements for:
Browse CME for all U.S. States
Accreditation Information
The American Medical Association is accredited by the Accreditation Council for Continuing Medical Education to provide continuing medical education for physicians. The AMA designates this journal-based CME activity for a maximum of 1 AMA PRA Category 1 CreditTM per course. Physicians should claim only the credit commensurate with the extent of their participation in the activity. Physicians who complete the CME course and score at least 80% correct on the quiz are eligible for AMA PRA Category 1 CreditTM.
Note: You must get at least of the answers correct to pass this quiz.
You have not filled in all the answers to complete this quiz
The following questions were not answered:
Sorry, you have unsuccessfully completed this CME quiz with a score of
The following questions were not answered correctly:
Commitment to Change (optional):
Indicate what change(s) you will implement in your practice, if any, based on this CME course.
Your quiz results:
The filled radio buttons indicate your responses. The preferred responses are highlighted
For CME Course: A Proposed Model for Initial Assessment and Management of Acute Heart Failure Syndromes
Indicate what changes(s) you will implement in your practice, if any, based on this CME course.
Submit a Comment

Multimedia

Some tools below are only available to our subscribers or users with an online account.

Sign in

Create a free personal account to sign up for alerts, share articles, and more.

Purchase Options

• Buy this article
• Subscribe to the journal

Related Content

Customize your page view by dragging & repositioning the boxes below.

Articles Related By Topic
Jobs
brightcove.createExperiences();