Flagellate Mushroom Dermatitis | Allergy and Clinical Immunology | JN Learning | AMA Ed Hub [Skip to Content]
[Skip to Content Landing]

Flagellate Mushroom Dermatitis

Educational Objective
To identify the key insights or developments described in this article
1 Credit CME

A woman in her 50s presented with a 4-day history of a diffuse, progressive, and pruritic rash. She had no known allergies and did not take any medications. She had no exposures to chemicals, detergents, or new personal care products; however, the patient consumed raw shiitake mushrooms several days before symptom onset. An examination revealed dozens of long flagellate streaks composed of red papules distributed across the trunk and extremities (Figure). She denied fever, malaise, or dyspnea. Laboratory results were remarkable for eosinophilia. The findings and history were consistent with flagellate mushroom dermatitis. The patient was treated with topical steroids, oral antihistamines, and raw shiitake mushroom avoidance, and the condition improved without sequelae.

Sign in to take quiz and track your certificates

Buy This Activity

JN Learning™ is the home for CME and MOC from the JAMA Network. Search by specialty or US state and earn AMA PRA Category 1 CME Credit™ from articles, audio, Clinical Challenges and more. Learn more about CME/MOC

CME Disclosure Statement: Unless noted, all individuals in control of content reported no relevant financial relationships. If applicable, all relevant financial relationships have been mitigated.

Article Information

Published Online: April 20, 2022. doi:10.1001/jamadermatol.2022.0605

Correction: This article was corrected on May 18, 2022, to fix an error in the corresponding author’s address.

Corresponding Author: Jade N. Young, BS, Oregon Health and Science University, School of Medicine, 3181 SW Sam Jackson Park Rd, Portland, OR 97239-3098 (jadeyoung715@gmail.com).

Conflict of Interest Disclosures: None reported.

Additional Contributions: We thank the patient for granting permission to publish this information.

References
1.
Nakamura  T .  Shiitake (Lentinus edodes) dermatitis.   Contact Dermatitis. 1992;27(2):65-70. doi:10.1111/j.1600-0536.1992.tb05211.xPubMedGoogle ScholarCrossref
2.
Suzuki  M , Takatsuki  F , Maeda  YY , Hamuro  J , Chihara  G .  Antitumor and immunological activity of lentinan in comparison with LPS.   Int J Immunopharmacol. 1994;16(5-6):463-468. doi:10.1016/0192-0561(94)90037-XPubMedGoogle ScholarCrossref
3.
Mendonça  FMI , Márquez-García  A , Méndez-Abad  C ,  et al.  Flagellate dermatitis and flagellate erythema: report of 4 cases.   Int J Dermatol. 2017;56(4):461-463. doi:10.1111/ijd.13523PubMedGoogle ScholarCrossref
4.
Chen  YB , Rahemtullah  A , Breeden  E , Hochberg  EP .  Bleomycin-induced flagellate erythema.   J Clin Oncol. 2007;25(7):898-900. doi:10.1200/JCO.2006.09.7691PubMedGoogle ScholarCrossref
Want full access to the AMA Ed Hub?
After you sign up for AMA Membership, make sure you sign in or create a Physician account with the AMA in order to access all learning activities on the AMA Ed Hub
Buy this activity
Close
Want full access to the AMA Ed Hub?
After you sign up for AMA Membership, make sure you sign in or create a Physician account with the AMA in order to access all learning activities on the AMA Ed Hub
Buy this activity
Close
With a personal account, you can:
  • Access free activities and track your credits
  • Personalize content alerts
  • Customize your interests
  • Fully personalize your learning experience
Education Center Collection Sign In Modal Right
Close

Name Your Search

Save Search
Close
With a personal account, you can:
  • Access free activities and track your credits
  • Personalize content alerts
  • Customize your interests
  • Fully personalize your learning experience
Close

Lookup An Activity

or

Close

My Saved Searches

You currently have no searches saved.

Close

My Saved Courses

You currently have no courses saved.

Close
With a personal account, you can:
  • Access free activities and track your credits
  • Personalize content alerts
  • Customize your interests
  • Fully personalize your learning experience
Education Center Collection Sign In Modal Right
Close