Collapse of the Plasmacytoid Dendritic Cell Compartment in Advanced Cutaneous Melanomas by Components of the Tumor Cell Secretome.

Melanoma is an immunogenic neoplasm infiltrated by T cells, although these adaptive T cells usually fail to eradicate the tumor. Plasmacytoid dendritic cells (PDCs) are potent regulators of the adaptive immune response and can eliminate melanoma cells via TLR-mediated effector functions. The PDC compartment is maintained by progressively restricted bone marrow progenitors.

Lupus miliaris disseminatus faciei in a young male.

We report a case of a healthy 26-year-old male with multiple asymptomatic reddish papules and papule-nodules on the central area of the face, persisting from more than 2 months and gradually increasing in number. An incisional skin biopsy revealed a confluent dense granulomatous infiltrate centred by large areas of eosinophilic necrosis consistent with the diagnosis of lupus miliaris disseminatus faciei (LMDF). This is a rare dermatosis first described in 1878 by Fox, that often poses a clinical challenge as it is a disease process which is difficult to diagnose.

Early cutaneous metastasis of adenoid cystic carcinoma of the salivary gland.

Adenoid cystic carcinoma (ACC) of the salivary glands is a malignant tumor characterized by slow but relentless progression that is plagued by local recurrence, late metastases, and ultimately fatal outcomes. Twenty-four percent to 52% of ACCs of the salivary glands result in distant metastasis, primarily involving the lungs, bones, liver, and brain. Cutaneous metastasis of these tumors is rare and usually represents an advanced stage of disseminated disease.

Pigmentation of axillary sentinel nodes from extensive skin tattoo mimics metastatic melanoma: case report.

Background: The relationship between the occurrence of skin diseases and skin tattoos remains unclear. Dermatologic disorders have been reported to occur in about 2% of cases. In addition, tattoo pigment can migrate to the regional lymph nodes through the lymphatic vessels and subsequently mimic metastatic disease from melanoma.