Inflammatory Breast Cancer and Transient Complete Radiographic Response to Chemoimmunotherapy: A Case Report.

Introduction: Inflammatory breast cancer is a rare and aggressive subtype, with high breast cancer mortality. Compared to noninflammatory breast cancer, even after treatment and response to standard-of-care breast cancer chemotherapy, it has a high propensity for lymph node involvement, high rates of distant metastasis, and shorter survival. The immune checkpoint inhibitor, pembrolizumab, in combination with chemotherapy is now approved for early triple negative breast cancer (TNBC) and for advanced disease if positive for the programmed cell death ligand 1 protein (PD-L1).

Primary mucosal melanoma arising from the eustachian tube with CTLA-4, IL-17A, IL-17C, and IL-17E upregulation.

Primary malignant melanoma arising from the eustachian tube is extremely rare. We report the case of a 63-year-old white man who presented with a 1-month history of left-sided hearing loss and aural fullness. Flexible fiberoptic laryngoscopy detected a blue-purple mass that appeared to arise from the left lateral nasopharynx.

Cytologic features of microcystic adnexal carcinoma.

Microcystic adnexal carcinoma (MAC) is an uncommon skin neoplasm with a predilection location around the lips. It is characterized by cords and nests of neoplastic cells forming ductular or glandular structures that are embedded in dense collagenous stroma. An eighty-seven year old Caucasian female patient presented with a painless, slowly enlarging mass measuring 3.

Collision tumor of primary laryngeal mucosal melanoma and invasive squamous cell carcinoma with IL-17A and CD70 gene over-expression.

The most common primary malignancy of the larynx is the squamous cell carcinoma (SCC). The primary malignant melanoma is quite rare in this location. Less than 60 cases of laryngeal melanomas have been reported to date.

Intraepidermal and dermal Merkel cell carcinoma with squamous cell carcinoma in situ: a case report with review of literature.

Merkel cell carcinoma (MCC), a rare aggressive primary cutaneous neuroendocrine carcinoma, occurs on sun-damaged skin, especially in the elderly. Its unique co-expression of cytokeratin 20 (CK20) and neuroendocrine markers, including neuron-specific enolase (NSE), is diagnostic. Most MCCs are located in the dermis, rarely has an intraepidermal component been reported.