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At least 127 records · Page 7Linked to original sources
PubMed1996

Metastasizing eccrine porocarcinoma: report of a case and review of the literature.

Eccrine porocarcinoma is a rare malignant tumor arising from the intraepidermal ductal portion of the eccrine sweat gland (acrosyringium). It usually affects older persons and is located most commonly on the lower extremities. We describe a 55-year-old man with an aggressive metastasizing eccrine porocarcinoma diagnosed 10 years after the primary lesion. The metastatic lesions were located in the public area and scrotum and were associated with progressive lymphedema. Several biopsy specimens revealed numerous tumor cells in the dermis and especially in the lumina of lymph and blood vessels. Immunohistochemical studies showed staining with cytokeratin KL1, epithelial membrane antigen, Ca 15-3, and Ca 19-9. Vimentin, S-100 protein, neuron specific enolase, and carcino-embryonic antigen were negative. Treatment with carbon dioxide laser failed. The use of interferon alfa-2a for 9 months stopped progression of the tumor.

Acrospiroma↗
PubMed2000

[Lung neoplasms revealing a rare cutaneous tumor: eccrine porocarcinoma].

INTRODUCTION: Eccrine sweat gland carcinoma, which belongs to the eccrine sweat gland carcinoma family, is a rare malignancy of the skin with a potential aggressive growth and metastatic spread. EXEGESIS: We report here a case of malignant eccrine poroma arising on the upper leg, with widespread pulmonary metastases. CONCLUSION: A brief synopsis of the pathological and clinical aspects of eccrine sweat gland carcinoma is presented with the currently available therapies.

Acrospiroma↗
PubMed1994

Expression of keratin 20 in malignant eccrine poromas.

Eight cases of malignant eccrine poromas were studied immunohistochemically with a broad panel of antibodies in order to better characterise the spectrum of their differentiating pathways. Special attention was paid to the expression of cytokeratins, mainly the newly recognised keratin 20. In general, the pattern of staining agreed to previous studies. Anyway, a non-expected positivity with keratin 20 was seen in two cases. The usefulness of the immunohistochemistry to discover areas with masked differentiation in adnexal tumours of the skin was once more confirmed.

Acrospiroma↗
PubMed1997

Malignant eccrine poroma of the hand: a case report.

Carcinoma of sweat glands is a very rare neoplasm that is difficult to diagnose clinically and histologically. This report presents a case of malignant eccrine poroma of the hand which is a distinct histologic subtype of sweat gland carcinoma with a high local recurrence rate. A distal radial artery based forearm flap was used to provide soft tissue coverage.

Acrospiroma↗
PubMed2003

Malignant eccrine hidradenoma of neck causing acute heart failure.

Tumours of eccrine sweat glands are uncommon, with complex classification and different terms used even for the same tumour. Therefore, for practical purposes, it may be sufficient to differentiate between benign and malignant. Malignant eccrine hidradenoma has a predilection for head and neck, with high incidence of recurrence following surgical excision and also regional and distant metastases. We describe a case, which presented as a medical emergency with symptoms of severe anaemia and acute heart failure secondary to intermittent bleeding from a huge ulcerative neck lesion, which was subsequently diagnosed as eccrine hidradenocarcinoma. The tumour was successfully treated with complete surgical excision and reconstruction followed by radiotherapy. Two years postoperatively, the patient is very well with no sign of recurrence.

Acrospiroma↗
PubMedDate not supplied

Clear cell hidradenoma of the second digit: a review of the literature with case presentation.

Clear cell hidradenoma is a well circumscribed and often encapsulated benign tumor of the dermis and subcutaneous tissue. These tumors have a low tendency toward ulceration, may vary in size, and have a low malignant potential. The treatment of choice is usually surgical excision. A literature review of this soft tissue tumor and a case history are presented.

Acrospiroma↗
PubMed2001

Metastatic eccrine porocarcinoma: response to docetaxel (Taxotere) chemotherapy.

BACKGROUND: Eccrine porocarcinoma is an uncommon neoplasm of the intra-epidermal sweat gland duct. PATIENTS AND METHODS: A case of eccrine porocarcinoma in a female renal transplant patient aged 45 years is described with a review of pertinent literature. RESULTS: The primary tumour was highly pleomorphic. In places large and small cells merged and focally the former component infiltrated the epidermis in a manner akin to Paget's disease of the breast. The majority of the tumour was high grade; using the modified Bloom and Richardson grading system, usually applied to mammary ductal carcinomas, the tumour graded as 3. Metastatic disease developed nine months following primary surgical treatment. The metastatic eccrine porocarcinoma was resistant to epirubicin but responded to docetaxel chemotherapy. CONCLUSIONS: There are no data to support the use of adjuvant therapy in the management of eccrine porocarcinoma. The use of the modified Bloom and Richardson grading system may define cases at high risk of relapse in which adjuvant therapy might be considered. Metastatic eccrine porocarcinoma has proven resistant to many chemotherapeutic agents. We report the first use of docetaxel in the management of this disease. The treatment was well tolerated and resulted in marked symptomatic and radiological responses. Treatment with docetaxel should be considered in future cases of this rare tumour.

Acrospiroma↗
PubMed2000

Cell proliferation in skin tumors with ductal differentiation: patterns and diagnostic applications.

The kinetic features of skin tumors with ductal differentiation (TDD) remain mainly unknown. We selected 88 skin TDD (D-PAS-positive cuticles) classified according to Murphy and Elder's criteria. Tumors studied included 13 poromas, 12 nodular hidradenomas, 10 cylindromas, 6 spiradenomas, 9 syringomas, 9 chondroid syringomas, 7 porocarcinomas, 15 malignant nodular hidradenomas, and 7 not otherwise specified carcinomas. The same tumor areas were evaluated for mitotic figure counting (MFC) and proliferation rate (PR = MIB-1 index), screening 10 consecutive high-power fields (HPFs) in the most cellular areas. Results were recorded by HPF and tumor cellularity, considering both average and standard deviation. Differences were analyzed by Student's t-test and analysis of variance (ANOVA) and considered significant if p<0.05. PR was significantly higher in malignant (23.29 +/- 12.49) than in benign tumors (3.86 +/- 4.44) and in poromanodular hidradenoma (4.99 +/- 3.34) than in spiradenoma-cylindroma-syringoma (1.91 +/- 1.67), but not by malignant tumor type. MFC was significantly higher in malignant (25.52 +/- 4.10) than in benign tumors (1.57 +/- 0.38), showing porocarcinomas the biggest MFC/10 HPF and malignant nodular hidradenomas the highest MFC/1000 cells. PR and MFC are useful malignancy criteria in skin TDD and should be evaluated by tumor cellularity to avoid potential misinterpretations related with tumor heterogeneity.

Acrospiroma↗
PubMed2000

Cytokeratin expression of apocrine and eccrine poromas with special reference to its expression in cuticular cells.

BACKGROUND: There are no immunohistochemical studies on cytokeratin (CK) expression in large series of cases of apocrine poroma. In addition, detailed immunohistochemical analysis of cuticular cells, a specific type of constituent cells of poromas, has not been reported. METHODS: Using the avidin-biotin method, we compared immunostaining patterns of eleven different anti-CK antibodies in 12 cases of apocrine and 21 cases of eccrine poromas, and normal adult skin. RESULTS: Poroid cells were exclusively positive for CK1/5/10/14, CK5/8 and CK14, which were expressed in the outer cells of normal dermal sweat ducts. Poroid cells were heterogeneously stained with anti-CK7, CK8/18, CK 10/11 and CK19 antibodies, which reacted in the inner cells of dermal ducts and in the secretory cells of sweat glands. The cuticular cells showed constant expression of CK1/5/ 10/14 and CK10/11, and various expression patterns of CK5/8, CK6, CK7, CK14, CK8/18, CK17, and CK19. CONCLUSIONS: Based on the keratin immunohistochemistry, the neoplastic cells in eccrine and apocrine poromas are considered to be closely related to the cells of dermal sweat ducts. Also the cuticular cells are considered to occupy an intermediate spectrum between the inner and outer cells of the dermal ducts. Although it is difficult to differentiate apocrine poroma from eccrine poroma by keratin expression patterns alone, the data obtained here can be helpful in differentiation of apocrine poroma from other hair follicle-related neoplasms.

Acrospiroma↗
PubMed2001

Tumor of the follicular infundibulum with sebaceous differentiation.

BACKGROUND: Tumor of the follicular infundibulum (TFI) is a relatively rare tumor which clinically presents as a solitary keratotic papule usually on the head and neck which on microscopic examination typically reveals a plate-like fenestrated epithelial tumor composed of pale staining cells. METHODS: We describe a new variant of TFI. An 80-year-old male with a history of multiple basal cell carcinomas and a squamous cell carcinoma presented with a 2-year history of a red, scaly, slightly elevated plaque on the lateral aspect of his right buttock. RESULTS: Histopathological examination revealed plate-like reticulate epithelial outgrowths of large and pale cells with foci of sebaceous differentiation and numerous colloid bodies. Differential diagnosis included superficial basal cell carcinoma with sebaceous and ductal differentiation, tumor of the follicular infundibulum, an unusual fibroepithelioma of Pinkus or an eccrine fibroadenoma with sebaceous differentiation. CONCLUSION: This case illustrates a hybrid adnexal tumor with histologic features common to both tumor of the follicular infundibulum and superficial epithelioma with sebaceous differentiation.

Acrospiroma↗
PubMed2001

"Apocrine" poroma: review of the literature and case report.

BACKGROUND: "Apocrine" poroma has recently been proposed as a new term to designate a distinctive benign skin neoplasm with differentiation toward the folliculosebaceous-apocrine unit. CASE REPORT: In support of alternative differentiation, a case of apocrine poroma is reported in a 73-year-old man. A nodule on the right upper abdomen, which was thought clinically to be seborrheic keratosis or basal cell epithelioma, was excised. HISTOLOGY: Histologically, this neoplasm heterogeniously consisted of poroma-like, sebaceous and follicular epithelial components. Since these components share the common embryologic origin of the folliculosebaceous-apocrine unit, this histologic pattern indicates apocrine differentiation of the tumor. CONCLUSION: This is an additional case to support the term "apocrine" poroma as a diagnosis.

Acrospiroma↗
PubMed2002

Aberrant expression of p16 and RB protein in eccrine porocarcinoma.

BACKGROUND: Eccrine porocarcinoma is a rare malignant tumor of the sweat gland and very little is known about its etiology and molecular basis. METHODS: To investigate the expression of p16 and retinoblastoma (RB) protein and their relationship, an immunohistochemical method was performed on nine eccrine porocarcinomas and five eccrine poromas. Furthermore, one case of eccrine porocarcinoma was analyzed for p16 gene mutation. RESULTS: A striking inverse correlation between p16 and RB expression was noted in all of the eccrine porocarcinomas and poromas. Strong immunoreactivity for p16 protein was observed in both nuclei and cytoplasm of the tumor cells in eight out of nine cases of eccrine porocarcinomas, while RB expression was negative in these cases. Conversely, one case of eccrine porocarcinoma did not show immunoreactivity for p16 protein, whereas RB protein was positive in the scattered nuclei. On the other hand, immunostaining of p16 was negative in all cases of five poromas, whereas RB-positive nuclei were sparse. No p16 gene mutation was detected in the investigated eccrine porocarcinoma case. CONCLUSIONS: These results indicate that detectable p16 protein and loss of RB protein are common occurrences in eccrine porocarcinoma lesions. Moreover, overexpression of p16 protein may be an additional, simple and useful diagnostic marker for eccrine porocarcinoma on routine laboratory screening.

Acrospiroma↗