Papillary Eccrine Adenoma
Papillary Eccrine Adenoma Senait W. Dyson, MD Key Facts Terminology Rare benign adnexal tumor with eccrine differentiation Most authorities separate PEAs from tubular apocrine adenomas Clinical Issues Presentation: Firm or…
Primary Cutaneous Mucinous Carcinoma
Primary Cutaneous Mucinous Carcinoma Senait W. Dyson, MD David Cassarino, MD, PhD Key Facts Terminology Malignant tumor with characteristic histology of epithelial islands “floating” in pools of mucin Clinical Issues…
Eccrine Hamartomas
Eccrine Hamartomas Christine J. Ko, MD Key Facts Microscopic Pathology Eccrine angiomatous hamartoma Eccrine glands normal (occasionally enlarged) or increased in number Endothelial cell-lined, thin-walled vascular spaces intimately admixed with…
Apocrine Carcinoma (Apocrine Adenocarcinoma)
Apocrine Carcinoma (Apocrine Adenocarcinoma) Christine J. Ko, MD David Cassarino, MD, PhD Key Facts Clinical Issues Axilla most common site, but other sites described No history of breast carcinoma Indolent…
Adenoid Cystic Carcinoma
Adenoid Cystic Carcinoma David Cassarino, MD, PhD Key Facts Terminology Adenoid cystic carcinoma (ACC) Rare adnexal tumor showing prominent cribriform pattern and perineural invasion Clinical Issues Up to 70% of…
Spiradenoma
Spiradenoma Steven D. Billings, MD Key Facts Clinical Issues Upper 1/2 of body most commonly involved Dermal mass/nodule, < 2 cm in size Often tender or painful lesion Microscopic Pathology…
Cylindroma
Cylindroma Steven D. Billings, MD Key Facts Etiology/Pathogenesis Familial cases associated with Brooke-Spiegler syndrome Clinical Issues Marked female predominance (F:M = 9:1) 90% present on head and neck Microscopic Pathology…
Hidradenocarcinoma
Hidradenocarcinoma Christine J. Ko, MD David Cassarino, MD, PhD Key Facts Terminology Malignant acrospiroma, malignant hidradenoma Malignant adnexal tumor arising from, or showing areas similar to, a hidradenoma Clinical Issues…
Porocarcinoma
Porocarcinoma David Cassarino, MD, PhD Key Facts Etiology/Pathogenesis May arise from malignant transformation of longstanding poroma Clinical Issues Rare tumors; approximately 200 cases reported Usually occur in elderly patients Acral…
Poroma and Dermal Duct Tumor
Poroma and Dermal Duct Tumor David Cassarino, MD, PhD Key Facts Terminology Eccrine poroma Apocrine poroma Hidroacanthoma simplex (intraepidermal poroma, syringoacanthoma) Acrospiroma (older term, includes poroma and hidradenoma) Benign adnexal…
