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Acinic cell adenocarcinoma of the parotid gland.
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Cancer of the external ear.
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Cytogenetic heterogeneity in a clear cell hidradenoma of the skin.
Short-term cultures from a clear cell hidradenoma, a benign skin tumor for which no chromosome data exist, were cytogenetically analyzed. A total of eight unrelated aberrant clones were identified. The karyotypic profiles of two separately processed parts of the sample--a tumor nodule and seemingly normal adjacent dermal tissue--were different. Characteristic for the tumor nodule was a single abnormal clonal population consisting of three subclones: 46,XY,der(2)inv(2)(p13q23)t(2;9)(p13;q22), der(9)t(2;9)(q23;q22),t(11;19)(q21;p13),t(12;19)(q24;p13)/46,idem, inv(1)(p32q44)/92,idemx2. The adjacent tissue contained, in addition to the clone found in the tumor nodule, a spectrum of unrelated clones, the largest of which also showed clonal evolution: 45-47,XY,t(3;6)(p25;p25),t(12;17)(q15;q12),-17,+r(17)x2 [cp]/45-47,idem,inv(5)(p15q22)/90-94,idemx2. The remaining six clones found in this part were small and had simpler numerical or structural aberrations. The multiclonal pattern observed in this hidradenoma seems to reflect both cytogenetic convergence and divergence during neoplastic progression. The presence of unrelated clones may be an indication that the tumor was of multicellular origin.
Eccrine poroma in an unusual site: a clinical and dermoscopic simulator of amelanotic melanoma.
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Unusual clinical presentation of benign eccrine poroma.
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Multiple eccrine poromas in the setting of total body irradiation and immunosuppression.
Eccrine poromas are benign, adnexal tumors that most often occur as a solitary lesion on the palm or sole. The occurrence of multiple eccrine poromas is extremely rare. In this report, we describe the development of several eccrine poromas in an acral distribution in a 42-year-old man. Before the appearance of these tumors, the patient had received total body irradiation and allogeneic bone marrow transplantation for treatment of acute lymphocytic leukemia. As a complication of the bone marrow transplant, the patient developed chronic graft-versus-host disease, which was treated with immunosuppressive therapy. We discuss this patient and review the available literature regarding multiple eccrine poromas.
Eccrine porocarcinoma of the ear mimicking basaloid squamous cell carcinoma.
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Cutaneous appendage tumors: familial cylindromatosis and associated tumors update.
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[Poroid hidradenoma].
Poroid hidradenoma is a recently described variant of eccrine poroma. This neoplasm presents structural findings of hidradenoma (solid and cystic areas) and cytological characteristics of poromas (poroid and cuticular cells, the latter showing ductal differentiation). We present a case of poroid hidradenoma in a 74-year-old woman, who consulted her physician because of a nodular lesion on the left buttock.
[Pigmented eccrine poroma].
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Porocarcinoma of the eyelid.
PURPOSE: The purpose of this report is to describe the clinical and histopathologic findings in a patient with porocarcinoma of the eyelid. METHODS: The case of a 68-year-old woman with a nodular lesion of the eyelid was studied, and the pertinent literature reviewed. RESULTS: No previous description of porocarcinoma of the eyelid was found in the literature. The present case presented with a nodular lesion of the right lower eyelid of 1-year duration. The tumor was completely excised. Microscopic study revealed ductal structures within lobules of tumor cells. CONCLUSIONS: Porocarcinoma is a rare cutaneous adnexal tumor arising from the eccrine secretory apparatus. Because the clinical behavior of this cancer includes deep invasion, regional lymphatic spread, and distant metastases, complete surgical excision is recommended, and should be verified by either conventional frozen sections or Mohs' micrographic sections.
Characterization of a malignant eccrine poroma by cytogenetic and fluorescence in situ hybridization techniques.
We have cytogenetically and by fluorescence in situ hybridization (FISH) analyzed short-term cultures from a malignant eccrine poroma, a type of tumor in which chromosomal abnormalities have previously not been reported. Combining the results from G-banding and FISH, the karyotype was interpreted as 50,XX,t(3;11;12)(q21;p15;q15),+5,+7,+9, +9,t(12;22)(q13;q13),+del(12)(q15),der(15)t(3;15) (q23;p13),der(17)t(8;17)(q22;p13),-20,add(22)(q13).
A rapidly growing eccrine poroma in a pregnant woman.
A variety of tumors develop or exacerbate during pregnancy and it is well known that a noticeable increase of eccrine activity occurs in this period. Eccrine poroma is a benign neoplasm that originates from the eccrine sweat gland. The development of this tumor during pregnancy is extremely infrequent. We report a rare case of rapidly growing eccrine poroma in an unusual location (the nose) in a pregnant woman.
Widespread metastatic eccrine porocarcinoma.
Eccrine porocarcinoma is a rare malignant sweat gland tumor arising from the acrosyringium. These lesions can show multiple epidermotropic metastases, however, systemic spread is rare. We describe the case of a 42-year-old African American man who presented in February 1998 with a lesion on the plantar surface of his right foot that was diagnosed as an eccrine porocarcinoma. Subsequently, during the next year, cutaneous metastases developed to his left shoulder and flank. Two years after his initial presentation, he was admitted with an esophageal mass and multiple gastric ulcers. Biopsy specimens of these lesions demonstrated metastatic eccrine porocarcinoma. Further evaluation revealed multiple metastases to lymph nodes, lungs, and brain. Histologic examination revealed nests of basaloid cells with eosinophilic cytoplasm and intracellular ductlike lumina lined by eosinophilic basement membranelike material. These ductular structures where highlighted by immunohistochemical stains for carcinoembryonic antigen, confirming their eccrine differentiation. There were mitotic figures and individual cell necrosis. Although rare, systemic metastases from an eccrine porocarcinoma must enter the differential diagnoses of a tumor mass in such patients.