PCACCPrimary Cutaneous Adenoid Cystic Carcinoma
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Although ADCCs of the salivary gland and the upper airways are commonly observed in routine clinical practice, PCACCs are very rare tumors, with <100 cases, including small series, having been reported previously [1, 26, 28].
Histopathologically, PCACCs consist of basaloid cells, which are arranged as cribriform nests, tubules, cords, and solid areas in the dermis and subcutis [1, 29].
The differential diagnosis of PCACCs in pathology practice can be difficult.
Although the two cell populations are detected in spiradenomas, this pattern is less organized than that in PCACCs (Table 2) [33].