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Misdiagnosed Histiocytic Sarcoma: A Case Report
Ling Zhang1, Jing Qin1, Peiwu Li1,2,3
1Emergency Center Lanzhou University Second Hospital Lanzhou China.
Clinical Case Reports
|October 6, 2025
Summary
A patient presented with symptoms mimicking infection but showed no improvement with standard treatments. Repeated tests ultimately diagnosed aggressive histiocytic sarcoma, a rare cancer, after treatment options were missed.
Area of Science:
- Oncology
- Pathology
- Internal Medicine
Background:
- Histiocytic sarcoma (HS) is a rare and aggressive malignant neoplasm.
- HS can present with non-specific symptoms, mimicking other conditions like infections.
- Delayed diagnosis of HS can lead to poor patient outcomes.
Purpose of the Study:
- To highlight the diagnostic challenges associated with histiocytic sarcoma.
- To emphasize the importance of multidisciplinary evaluation in complex cases.
- To underscore the critical impact of timely diagnosis on treatment efficacy for aggressive cancers.
Main Methods:
- Case report of a 31-year-old male patient.
- Review of clinical presentation, treatment response, and diagnostic procedures.
- Inclusion of repeated histopathological examinations.
- Multidisciplinary team consultation.
Main Results:
- Patient initially presented with symptoms suggestive of infection.
- Standard anti-infective and anti-inflammatory treatments were ineffective.
- Clinical course was marked by symptom exacerbation.
- Final diagnosis of histiocytic sarcoma was confirmed through histopathology.
Conclusions:
- Histiocytic sarcoma can present insidiously, mimicking infectious diseases.
- Persistent, unexplained symptoms warrant comprehensive investigation beyond initial diagnoses.
- Aggressive nature of HS necessitates prompt diagnosis and treatment initiation.
- Diagnostic delays in HS can result in loss of therapeutic window.
