A Case of Clear Cell Eccrine Porocarcinoma

Eccrine porocarcinoma (EP) is a rare malignant tumor arising from the intraepidermal eccrine duct. The tumor cells frequently contain glycogen, but prominent clear cell changes in EP are rarely reported. A 78-year-old woman presented with a slightly pruritic, erythematous, verrucous plaque on her left thigh. Histopathological examination revealed intraepidermal tumor cell nests composed of small basaloid cells and duct-like structures lined by periodic acid-Schiff (PAS)-positive cuticles. Besides the typical findings of EP, clear cell changes were predominantly observed in the tumor cell aggregations. Herein we report a case of the clear cell variant of EP rarely reported in previous literature.

A Case of Malignant Eccrine Poroma Developing on the Suprapubic Area

Malignant eccrine poroma is a rare skin appendageal tumor arising from the intraepidermal ductal portion of the eccrine sweat gland. It may develop either spontaneously or from a long-standing eccrine poroma. It usually affects the aged and is located most commonly on lower extremities. We report a case of malignant eccrine poroma occurring on the suprapubic area of a 75-year-old Korean man. He underwent wide excision and flap coverage.

Malignant Eccrine Poroma of the Left Upper Eyelid Resembling Cutaneous Horn / 대한피부과학회지

Malignant eccrine poroma is a rare skin appendage tumor, originating from the intraepidermal eccrine duct. It develops either spontaneously or in an eccrine poroma of long-standing duration. It usually affects older people and is located most commonly on the lower extremities. We report a case of an 84 year old woman with a malignant eccrine poroma on the left upper eyelid, which resembled a cutaneous horn. She presented with a solitary, tender, firm, 0.4x0.4x0.9 cm-sized, silvery-white colored papule on the left upper eyelid. She was treated with surgical excision and to date shows no recurrence.

Case Report of Malignant Eccrine Poroma on Lower Abdomen

Malignant eccrine poroma is a rare malignant tumor that arises from the intraepithelial ductal portion of the eccrine sweat gland. It may be developed either spontaneously or from a preexisting benign eccrine poroma. We report a case of malignant eccrine poroma on right lower abdomen in a 78-years-old female, which has been present for 1 year. In our case the tumor demonstrated without local invasion and distant metastasis, and was successfully removed by surgery.

A Case of Malignant Eccrine Poroma / 대한피부과학회지

Malignant eccrine poroma is a rare malignant cutaneous tumor arising from intraepithelial eccrine duct and it may develop either spontaneously or from a long standing eccrine poroma. We report a case of malignant eccrine poroma on the antihelix of the right ear in a 37-year-old female, previously diagnosed as a benign eccrine poroma with shave biopsy specimens. Histological findings are well-defined tumor cell nests disseminated in dermis. Each cell has a large, hyperchromatic atypical nuclus. The atypical mitoses, dyskeratoses, intracytoplasmic vacuolations and duct-like structures are observed. She was treated with wide surgical excision and local skin flaps.

A Case of Malingant Eccrine Poroma / 대한피부과학회지

Malinant eccrine poroma is a rare malignant tumor that arises from the intraepithelial ductal portion of the eccrine sweat gland, that may develop either spontaneously or from a preexisting benign eccrine poroma. It usually affects elderly patients in both sexes and is usually found on the lower extremities and the head. We described 71-year-old female with a malignant eccrine poroma in the scalp developing from benign eccrine poroma, which has been present for 5 years. The local recurrence and regional metastatic rate are both approximately 20%. Distant metastasis occurs in 12% of cases. In our case the tumor demonstrated without local invasion and distant metastasis, and was successfully removed by surgery.

A Case of Malignant Eccrine Poroma / 대한피부과학회지

Malignant eccrine poroma, or eccrine porocarcinoma, is a rare malignant cutaneous appendageal tumor arising from the intraepidermal eccrine sweat duct(acrosyringium), and usually develops ia an eccrine poroma of long-standing. We report a case of malignant eccrine poroma on the left buttock in a 72 year-old female. She was presented with a slightly pruritic, well-defined, reddish, firm, 4.5 x 4.5 x 0.7cm sized, protruding, ulcerated tumor. Histopathological examination revealed well-defined tumor cell nests in the epidermis and dermis. The tumor nests consisted of areas of eccrine poroma cells with benign appearance adjoining areas of anaplastic cells. Duct-like structures were observed within the tumor nests and showed a PAS-positive, diastase-resistant reaction. On immunohistochemical staining, the tumor cells were, positive for EMA, and most of tumor cells were negative but the duct-like structures were positive for CEA. She was treated with surgical excision. During the three year follow up period after excision, there was no recurrence.

Malignant Eccrine Poroma of Abdomen Brief case report

Eccrine porocarcinoma is a rare tumor of the skin. A case report of an eccrine porocarcinoma metastasizing to epidural space of spinal cord and inguinal area with a nine year follow up is described. The patient had a nodular growth of the abdomen with both inguinal lymphadenopathy three years before its first excision. After a follow up of nine years, he complained a weakness of lower extremities and back pain. Extradural mass of 10th thoracic vertebra and left inguinal mass were found. Subsequently, the masses histologically identical to the skin tumor were found.