Elucidating Cytomorphological Features of Eccrine Porocarcinoma on The Forehead Presenting Without Pre-existing Poroma in an Adult Male: A Rarity Unveiled with a Comprehensive Review of Literature.

Eccrine porocarcinoma (EPC), a rare and aggressive skin adnexal malignancy, presents significant diagnostic and management challenges due to its low incidence and clinical resemblance to other skin lesions. The case report highlights its rarity, propensity for aggressive behavior, and the importance of prompt diagnosis for effective management. A 50-year-old male presented with a rapidly enlarging swelling on his forehead, clinically resembling to any other skin lesion. Fine needle aspiration biopsy (FNAB) revealed atypical basaloid cells suggestive of porocarcinoma, confirmed by histopathological examination and immunohistochemistry. The case emphasized the diverse clinical presentation and the utility of FNAB in early diagnosis. This case underscores the comprehensive understanding of EPC, including its clinical, cytological, histopathological, and immunohistological features. It also emphasizes the key cytological features and its role in early diagnosis.