Background: Apocrine hidrocystoma is an uncommon benign cystic proliferation of the apocrine sweat glands. Malignant melanoma, eccrine hidrocystoma, angioma, and follicular cysts have to be considered as differential diagnoses.
Methods And Results: A 63-year-old man is presented with a dark mass measuring 2 x 2 cm on his right cheek. An exocrine tumor or, more unlikely, a melanoma was considered as a differential diagnosis. Pathologically, the lesion was determined to be an apocrine hidrocystoma.
Conclusions: This benign lesion can be excised by a narrow margin. Therefore, knowledge of this benign entity in head and neck surgery including the differential diagnosis can prevent an unnecessarily large defect by too large margins.
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Article Synopsis
- Tumor collisions, a rare occurrence with a 0.0017% incidence rate, often involve seborrheic keratosis, melanocytic nevi, and basal cell carcinoma (BCC), and are generally considered incidental events.
- A retrospective study was conducted analyzing hospital records to identify collisions between BCCs or squamous cell carcinoma (SCC) and apocrine-sebaceous-follicular unit (ASFu) neoplasms from 2005 to 2017.
- The study identified 12 collision cases involving BCC and ASFu tumors, primarily in immunosuppressed patients, with many neoplasms located beneath the BCC, leading to new insights and hypotheses about these tumor interactions
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