[Skip to Content]
[Skip to Content Landing]

Tinea Nigra Palmaris

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

A man in his 20s presented with a 2-year history of slowly increasing, asymptomatic dark spots on his left palm. On examination, there were multiple coalescing brownish black macules with irregular borders over the left palm and palmar aspect of the digits, with black pigmentary accentuation over the creases. They were devoid of any scaling or signs of inflammation (Figure). A direct microscopic examination (DME) on potassium hydroxide (10%) mount revealed brown branched septate hyphae. A culture in Sabouraud agar revealed brownish black wet colonies after 1 month of inoculation at 21 °C. A diagnosis of tinea nigra palmaris was made, and he was treated with topical azoles and keratolytics with excellent response and resolution within 2 months of therapy.

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 Credit(s)™ 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

Corresponding Author: Sushil Kumar, MD, Department of Dermatology, Military Hospital, Prayagraj, Uttar Pradesh 211002, India (dmt5861@gmail.com).

Published Online: October 26, 2022. doi:10.1001/jamadermatol.2022.4442

Conflict of Interest Disclosures: None reported.

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

References
1.
Perez-Tanoira  R , Olivo  CZ , Alen  JF ,  et al.  Tinea nigra palmaris: a clinical case in a rural Ethiopian hospital.   Rev Inst Med Trop Sao Paulo. 2018;60:e52. doi:10.1590/s1678-9946201860052PubMedGoogle ScholarCrossref
2.
Valentim  FO , Lacerda  PN , Haddad  GR .  Tinea nigra: a series of three cases observed in Botucatu, São Paulo.   Rev Soc Bras Med Trop. 2021;54:e0563-e2020. doi:10.1590/0037-8682-0563-2020PubMedGoogle ScholarCrossref
3.
Piliouras  P , Allison  S , Rosendahl  C , Buettner  PG , Weedon  D .  Dermoscopy improves diagnosis of tinea nigra: a study of 50 cases.   Australas J Dermatol. 2011;52(3):191-194. doi:10.1111/j.1440-0960.2011.00790.xPubMedGoogle ScholarCrossref
4.
Bonifaz  A , Badali  H , de Hoog  GS ,  et al.  Tinea nigra by Hortaea werneckii, a report of 22 cases from Mexico.   Stud Mycol. 2008;61:77-82. doi:10.3114/sim.2008.61.07PubMedGoogle ScholarCrossref
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
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
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
Close

Lookup An Activity

or

My Saved Searches

You currently have no searches saved.

Close

My Saved Courses

You currently have no courses saved.

Close