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Proliferating epithelial cysts
Although both PTC and PEC were locally aggressive tumors and potentially malignant, distant metastasis was unusual and these tumors should be treated with wide local excision, especially those showing cytologic atypia and carcinomatous changes.
Merkel cell carcinoma: analysis of clinical, histologic, and immunohistologic features of 132 cases with relation to survival.
Cell size, mitotic rate, and tumor size are significant factors in relation to the biologic behavior of MCC.
Spindle Cell and Epithelioid Cell Nevi with Atypia and Metastasis (Malignant Spitz Nevus)
Study of these cases suggests that although some lesions with features of S&E nevi may involve local lymph nodes, widespread metastases do not result, and no recurrences or further metastases have been found.
Aggressive digital papillary adenoma and adenocarcinoma. A clinicopathological study of 57 patients, with histochemical, immunopathological, and ultrastructural observations
The recognition of aggressive digital papillary adenoma and adenocarcinoma as a distinct clinicopathological eccrine sweat gland neoplasm is important because of the potential for aggressive local growth and distant metastasis.
Trichogerminoma. Report of 14 cases.
Histologically, trichogerminomas were characterized by sharply circumscribed, pseudoencapsulated dermal and subcutaneous nodules, which separated these neoplasms from other tumors of pilar origin and from basal cell carcinoma.
Primary cutaneous adenoid cystic carcinoma.
  • J. Seab, J. Graham
  • Medicine
    Journal of the American Academy of Dermatology
  • 1 July 1987
Ten cases from the files of the Armed Forces Institute of Pathology were studied and the diagnostic histologic features and the differentiation of adenoid cystic carcinoma from other cutaneous neoplasms are discussed.
Fibrous papule of the nose: a clinicopathological study.
The histogenesis and pathogenesis of this unique tumor indicates the lesion probably represents the residual of a cellular nevus in which stromal elements persist because of the anatomical location.
Pilomatrix carcinoma
The authors report 20 patients with pilomatrix carcinoma and review the pertinent literature to confirm the existence of a malignant variant of pilom atrixoma.
Carcinoma cuniculatum (verrucous carcinoma of the skin): A clinicopathologic study of 46 cases with ultrastructural observations
Forty‐six examples of carcinoma cuniculatum, a rare variant of squamous cell carcinoma of the skin, were studied by means of light and electron microscopy and immunoperoxidase techniques and revealed features of well‐differentiated squamouscell carcinoma.