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Shadow Cells Meet Keratin: A Rare Follicular Hybrid Cyst of Epidermal and Pilomatricoma Origin
Arushi Gupta
1
, Shaaan Khetrapal
1
, Zeeba. S. Jairajpuri
1
, Fahad
2
Departments of
1
Pathology and
2
Surgery, Hamdard Institute of Medical Sciences and Research, Jamia Hamdard, New Delhi 110062, India.
Corresponding Author:
Dr Shaan Khetrapal
Email: shaankhetrapal@gmail.com
Received:
27-MAY-2025
Accepted:
17-NOV-2025
Published Online:
25-MAY-2026
DOI:
http://dx.doi.org/10.17659/01.2026.0010
Abstract
Background
: Follicular hybrid cysts (FHCs) are uncommon cutaneous lesions characterized by the co-existence of two or more distinct follicular components within a single cystic structure. Because of their nonspecific clinical appearance, they are frequently misdiagnosed as common benign cystic lesions. Histopathological examination plays a crucial role in establishing the correct diagnosis.
Case Report
: We report a case of a 68-year-old male who presented with a slow-growing nodular lesion over the back. The lesion was clinically suspected to be a benign cutaneous cyst. On histopathological examination, the cyst showed characteristic features of both epidermoid cyst and pilomatricoma, including keratinizing squamous epithelium and the presence of shadow cells. These findings confirmed the diagnosis of a follicular hybrid cyst composed of epidermoid and pilomatricoma components.
Conclusion
: Follicular hybrid cysts are rare lesions that may pose a diagnostic challenge due to their overlapping clinical features with other adnexal cysts. Recognition of their distinct histological components is essential for accurate diagnosis. Awareness of such unusual combinations helps clinicians and pathologists differentiate them from other cutaneous adnexal tumors and ensures appropriate management.
Keywords :
Epidermal Cyst, Follicular Hybrid Cyst, Histopathology, Pilomatricoma, Skin Neoplasms.
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Khetrapal S
Jairajpuri Z S
Fahad
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Last updated on Jul 11, 2026