Related Experiment Videos
Primary cutaneous Langerhans cell histiocytosis in an adult
Insights
This case study presents a rare instance of benign primary cutaneous Langerhans cell histiocytosis in a 76-year-old man. The condition showed localized recurrence but responded well to surgical excision, indicating a favorable prognosis.
Area of Science:
- Dermatology
- Oncology
- Pathology
Background:
- Langerhans cell histiocytosis (LCH) is a rare clonal proliferative disorder of Langerhans cells.
- Primary cutaneous LCH, particularly in adults, is uncommon and often presents diagnostic challenges.
Observation:
- A 76-year-old male presented with an asymptomatic, dark red nodule on his left buttock.
- Histopathology revealed a dermal infiltrate of S-100 and CD1a positive histiocytic cells with Birbeck granules.
- The patient subsequently developed inguinal lymph node involvement and recurrent cutaneous nodules.
Findings:
- Despite recurrence, the patient remained well over a four-year follow-up period with only surgical management.
- The clinical course and response to excision suggest a benign behavior of this specific LCH presentation.
Implications:
- This case supports the classification of certain adult primary cutaneous LCH presentations as 'benign'.
- Highlights the importance of thorough histopathological and ultrastructural analysis for accurate LCH diagnosis.
- Suggests that surgical excision may be an effective treatment for localized, recurrent cutaneous LCH.
Abstract:
A 76-year-old man with Langerhans cell histiocytosis was admitted with an asymptomatic, dark red nodule on his left buttock. Histologic examination of the nodule showed a dense dermal infiltrate of histiocytic cells with bean-shaped nuclei; these cells reacted with antibodies to S-100 and CD1a. Ultrastructural analysis showed Birbeck granules in the cytoplasm of the histiocytic cells. Inguinal lymph node involvement subsequently developed in the patient and cutaneous nodules recurred three times in the inguinal area. Four years have passed since he first was admitted to our hospital with the cutaneous nodule on his buttock, and he is doing well without any intensive treatment except wide excision of the nodules and inguinal lymph nodes. We believe this case should be classified as one of "benign" primary cutaneous Langerhans cell histiocytosis based on the clinical course.