Abstract
Background: Cystic lesions of the scalp with a clinical diagnosis of an epidermoid cyst are encountered in clinical practice. However, these lesions had a different diagnostic interpretation on histopathology examination. Therefore our study focused on the lesions clinically resembling the presentation of epidermoid cyst in the scalp region. Materials and Methods: Forty-one cases of scalp lesions with a clinical diagnosis of epidermoid cyst over 2 years were reviewed. Details of the patients such as clinical diagnosis, age, gender, duration, gross findings, and histopathology diagnosis were obtained from the medical and histopathology records. Results: Epidermoid cysts diagnosed both clinically and on histopathology examination accounted for 29.26% whereas the clinical mimickers constituted 70.73%. The mean age of the patient was 35-years with an equal sex ratio. The commonest location was the parietal region (41.37%). Benign and malignant lesions consisted of 97.56% and 2.4% respectively. A trichilemmal cyst was the most common clinical mimicker diagnosed. Conclusions: Clinicians should be aware of wide differential diagnosis of epidermoid cyst in the scalp region as the management and outcome vary with each lesion. Histopathology examination proved to be a diagnostic tool in differentiating these lesions.
Highlights
A broad spectrum of scalp lesions is identified as painless soft tissue masses in clinical practice in all age groups
Basal cell carcinoma, and melanoma are known to occur in the scalp region.[1]
Even though the frequency of epithelial tumors in the skull is 2%, scalp masses presenting as Epidermoid cyst (EC) has a wide range of histopathological features in all age groups
Summary
A broad spectrum of scalp lesions is identified as painless soft tissue masses in clinical practice in all age groups. The etiology of these lesions can be inflammatory, infectious, traumatic, or neoplastic. Our study is focused to ascertain the spectrum of scalp lesions mimicking the presentation of an epidermoid cyst. Cystic lesions of the scalp with a clinical diagnosis of an epidermoid cyst are encountered in clinical practice. These lesions had a different diagnostic interpretation on histopathology examination. Our study focused on the lesions clinically resembling the presentation of epidermoid cyst in the scalp region
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