The Cystic Sponge Anus

Hessel H. Van Der Zee, Pim Aarts*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review



A peculiar spongy appearance of the perianal skin was observed in a patient who underwent wide excision surgery for inguinal and gluteal hidradenitis suppurativa (HS). Case 


This peculiar appearance was observed in a 62-year-old male patient. It included multiple orifices and cavities forming the spongy aspect of the perianal skin with multiple cysts and giant comedones. The perianal lesions were asymptomatic and the patient had never received any perianal treatment for the comedones or cysts. Histopathology was performed and demonstrated dilated hair follicles with flaky keratin and loose hair shafts in the center. The spongy appearance was most likely the result of spontaneous shedding of the cystic contents. 


We suspect that the "cystic sponge anus"might be associated with HS, smoking, the male gender, and may yet be another expression of an occlusive follicular disease. Future studies will be needed to clarify the prevalence and comorbidities of the "cystic sponge anus."

Original languageEnglish
Pages (from-to)94-96
Number of pages3
JournalCase Reports in Dermatology
Issue number1
Publication statusPublished - 2 Apr 2024

Bibliographical note

Publisher Copyright:
© 2024 The Author(s). Published by S. Karger AG, Basel.


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