Abstract
Pilomatricomaisa benign skin adnexal tumor that is derived from hair matrix. Pilomatricomas usually present in children and adolescents but can occur at any age. Pilomatricomas are generally asymptomatic and found mainly in the head and neck area. Upper extremities not a common site for this lesion. It israrely identified on the chest, trunk, or lower extremities. They areeasily diagnosed on histology due to their typical histological features but diagnosis in cytology is generally difficult as the features may mimic other skin lesions and leads to misdiagnosis. Here we describe a case of pilomatricoma of left arm in a 25 year old male, which was diagnosed on cytology. The cytological smears were cellular and consist of aggregates of anucleate squames, basaloid cells and shadow cells. Subsequent histopathologyof the excised lesion confirmed the diagnosis of Pilomatricoma. Through thisreport we highlight the cytomorphological features that helps us in arriving the correct diagnosis of Pilomatricomaon Fine needle aspiration cytology (FNAC) smears.
Highlights
Pilomatricomaisan uncommon benign tumourof hair follicle that is derived from hair matrix [1]
Through thisreport we highlight the cytomorphological features that helps us in arriving the correct diagnosis of Pilomatricomaon Fine needle aspiration cytology (FNAC) smears
Wedescribe a case of pilomatricoma of left arm in a 25-year-old male, which was diagnosed on Fine needle aspiration cytology and subsequent histopathology of the excised lesion confirmed the diagnosis of Pilomatricoma
Summary
Pilomatricomaisan uncommon benign tumourof hair follicle that is derived from hair matrix [1]. Most commonly pilomatricoma affects children and adolescents but they can be diagnosed in adults . They areslightly more common in females than males. Background shows keratinous debris and anucleate squames These features strongly suggested diagnosis of Pilomatricoma. Figure-1: Photograph showing many clusters of basaloid cells with keratinous debris and squames in the background (H&E stain, 4x), INSET : Clusters of basaloid cells (H&E stain,40x). Figure-2: Photograph showing clusters and scattered population of basaloid cells, ghost cells and inflammatory cells in the background. Figure-4: Photograph showing island of basaloid cells and eosinophilic shadow cells (H&E stain -4x). Figure-5: Photograph showing sheets of eosinophilic shadow cells along with foreign body giant cells (H&E stain– 40x) ; INSET : Foci of calcification (H&E stain,10X)
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