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A Large Lumbar Adnexal Neoplasm Presenting Characteristics of Eccrine Poroma and Poroid Hidradenoma.Case Reports in Surgery 2017Poroma is a rare benign neoplasm that derives from eccrine sweat glands epithelium. Its histological subtypes, with respect to its position within skin layers, are...
Poroma is a rare benign neoplasm that derives from eccrine sweat glands epithelium. Its histological subtypes, with respect to its position within skin layers, are eccrine poroma, hidroacanthoma simplex, poroid hidradenoma, and dermal duct tumor. Poromas commonly exhibit benign clinical behavior as they are usually small and asymptomatic and do not exhibit malignant behavior. Although their histological subtypes share similar histological characteristics, they rarely coexist in the same tumor. In this report we present the case of an unusual poroma in terms of histological and clinical behavior as it was large and presented histological characteristic of both eccrine poroma and poroid hidradenoma. Coexistence of different histologic subtypes in the same tumor indicates simultaneous tumorigenesis, differentiation from one cell type to another, or parallel differentiation from a common progenitor cell. Implications in treatment remain unknown partly due to the rarity of such cases.
PubMed: 29057137
DOI: 10.1155/2017/9865672 -
International Journal of Clinical and... 2013
Review
Topics: Eccrine Porocarcinoma; Humans; Male; Melanins; Middle Aged; Poroma; Sweat Gland Neoplasms
PubMed: 24294398
DOI: No ID Found -
Dermatology Practical & Conceptual May 2022
PubMed: 35646434
DOI: 10.5826/dpc.1202a79 -
Dermatology Practical & Conceptual Jan 2013Eccrine poroma is a benign neoplasm that can mimick a malignant neoplasm dermoscopically. The characteristic vascular pattern of this tumor has not been established.
BACKGROUND
Eccrine poroma is a benign neoplasm that can mimick a malignant neoplasm dermoscopically. The characteristic vascular pattern of this tumor has not been established.
OBJECTIVE
To evaluate dermoscopic features of non-pigmented eccrine poroma in Mexican patients.
METHOD
We retrospectively studied histologically proven cases of eccrine poroma from three Mexican hospitals analyzed by four dermoscopists.
RESULTS
Thirteen cases were studied. A polymorphous vascular pattern was found in most cases. Four presented with irregular linear and branched vessels with semi-elliptical, or semicircular endings ("chalice-form" and "cherry-blossoms" vessels). Structureless pink-white areas were the most common other dermoscopic finding.
CONCLUSIONS
"Chalice-form" and "cherry-blossom" vessels have not been reported in other benign or malignant neoplasms and can be a useful clue to the diagnosis of non-pigmented eccrine poroma. Due to the variability of dermoscopic patterns of eccrine poroma further studies are required to establish the specificity of our findings.
PubMed: 23785633
DOI: 10.5826/dpc.0301a07 -
JAAD Case Reports Jul 2022
PubMed: 35734511
DOI: 10.1016/j.jdcr.2022.05.016 -
Journal of Dermatological Case Reports Nov 2009Eccrine poromas are relatively common slow-growing benign solitary adnexal tumors originating from the intraepidermal portion of the eccrine sweat duct (acrosyringium)....
BACKGROUND
Eccrine poromas are relatively common slow-growing benign solitary adnexal tumors originating from the intraepidermal portion of the eccrine sweat duct (acrosyringium). Dystrophic calcification is rarely found in lesions of eccrine poroma, and only 2 cases of eccrine poroma with calcification have been reported thus far. In the present report, we describe another case of eccrine poroma with calcification occurring in the palm of the hand. Also, we show dermoscopic features of this case.
MAIN OBSERVATIONS
A 73-year-old man with hemiparesis, who had a 10-year history of tumor on his right palm, which was occasionally injured by a walking crutch, causing bleeding and ulceration. Physical examination revealed a pigmented dome-shaped tumor. Dermoscopic analysis revealed glomerular vessels, multiple pink-white structureless areas, and lacunae. Histological examination revealed that the tumor was composed of cords of tumor cells extending from the epidermis into the dermis. These were uniformly cuboidal cells with round, basophilic nuclei and dense vascular stromas with telangiectasia. The tumor showed cystic structures and calcification. The patient was diagnosed with Pinkus-type eccrine poroma on the basis of histological findings.
CONCLUSIONS
Although cutaneous neoplasms commonly associated with calcification are of follicular origin, it is known that dystrophic calcification may be triggered also in tumors of eccrine origin by multiple factors, including mechanical injury. Dermoscopy may be helpful in establishing clinical diagnosis of calcified eccrine poromas.
PubMed: 21886728
DOI: 10.3315/jdcr.2009.1033 -
Dermatology Online Journal May 2009Poroma is a benign adnexal skin tumor seen in middle aged individuals with no sex predilection. The acral sites are the most commonly affected regions. Hip or buttock as...
Poroma is a benign adnexal skin tumor seen in middle aged individuals with no sex predilection. The acral sites are the most commonly affected regions. Hip or buttock as a location of origin has rarely been reported. We report two cases of poroma, one located on the hip of a 75-year-old man and the other on the buttock of a 60-year-old man.
Topics: Acrospiroma; Aged; Buttocks; Hip; Humans; Male; Middle Aged; Organ Specificity; Sweat Gland Neoplasms
PubMed: 19624988
DOI: No ID Found -
Indian Journal of Dermatology,... 2015
Topics: Adult; Dermoscopy; Humans; Male; Poroma; Sweat Gland Neoplasms
PubMed: 25851755
DOI: 10.4103/0378-6323.154787 -
Dermatology Practical & Conceptual Jul 2022
PubMed: 36159139
DOI: 10.5826/dpc.1203a135 -
Acta Dermato-venereologica 2009Eccrine poroma can mimic benign and malignant melanocytic and non-melanocytic lesions. To date, little is known about the dermoscopic features of this condition. Seven...
Eccrine poroma can mimic benign and malignant melanocytic and non-melanocytic lesions. To date, little is known about the dermoscopic features of this condition. Seven histopathologically proven cases of eccrine poroma were examined using dermoscopy by three independent dermatologists. Both glomerular and hairpin vessels were observed in 71% of cases, whereas linear irregular vessels were observed in 43% of cases. A white-to-pink halo surrounding the vessels and multiple pink-white structureless areas were also frequently found (in 86% and 71% of cases, respectively). Three dermoscopic "profiles" were identified, all characterized by the presence of a white-to-pink halo surrounding the vessels, as well as by the association of two additional different features, namely: glomerular vessels and pink-white structureless areas, glomerular and linear irregular vessels, hairpin vessels and linear irregular vessels. However, due to the small number of lesions studied so far, we suggest that these profiles should be considered as likely, but not definitely pathognomonic signs of eccrine poroma.
Topics: Acrospiroma; Adult; Aged; Dermoscopy; Diagnosis, Differential; Female; Humans; Male; Middle Aged; Sweat Gland Neoplasms
PubMed: 19326001
DOI: 10.2340/00015555-0608