Periungal angiofibroma

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Periungal angiofibroma
Periungal angiofibroma associated with tuberous sclerosis
SymptomsSmall bump under nail[1]
Differential diagnosisVerruca vulgaris, subungal exostosis[2]
FrequencyOccur in 30% to 60% of tuberous sclerosis[2]

Periungal angiofibroma, also known as Koenen tumor, is angiofibroma under the nail.[1][2] It is present in 30% to 60% of tuberous sclerosis cases.[2]

Signs and symptoms

Koenen tumor in tuberous sclerosis

See also


  1. 1.0 1.1 Mocellin, Simone (2021). "57. Cutaneous angiofibroma". Soft Tissue Tumors: A Practical and Comprehensive Guide to Sarcomas and Benign Neoplasms. Switzerland: Springer Nature. pp. 189–192. ISBN 978-3-030-58709-3. Archived from the original on 2023-05-01. Retrieved 2023-04-30.
  2. 2.0 2.1 2.2 2.3 Macri, Angela; Kwan, Eddie; Tanner, Laura S. (2021). "Cutaneous Angiofibroma". StatPearls. StatPearls Publishing. Archived from the original on 2023-04-27. Retrieved 2023-04-27.