The transition between a poroma and a porocarcinoma evidenced by the dermoscopy

Abstract Eccrine porocarcinoma (EPC) is a rare malignant skin tumor. The dermoscopy of invasive EPC reveals focal presence of whitish-pink, structureless areas surrounded by pinkish-white halos. In an eccrine poroma (EP), such areas present diffuse distribution in the "frog- eggs" pattern. We reported an EPC in situ that presents a transitional dermoscopy pattern between EP and invasive EPC. We found a diffuse distribution; whitish-pink, structureless areas surrounded by pinkish-white halos; a central exulceration and a polymorphic vascular pattern.

Poroma no pigmentado inusualmente grande: reporte de un caso y revisión de la literatura / Unusually large unpigmented poroma: a case report and literature review

El poroma es un tumor benigno infrecuente derivado de la porción intraepitelial del epitelio ductal de la glándula sudorípara. La presentación clínica más habitual es un pápula o nódulo de color rosado a rojo, de pequeño diámetro, localizado con mayor frecuencia en palmas y plantas, generalmente asintomático. Debido a su variabilidad morfológica, los poromas son usualmente difíciles de reconocer, siendo la dermatoscopía una herramienta útil en su diagnóstico. Presentamos el caso de un paciente masculino con un gran tumor en su pierna derecha de 40 mm de diámetro, con características dermatoscópicas compatibles con poroma no pigmentado. El diagnóstico confirmatorio se realizó con una biopsia incisional seguido de la extirpación quirúrgica completa del tumor

Poroma is a rare benign tumour derived from the intraepithelial portion of the sweat glands' ductal epithelium. The most common clinical presentation is a pink to red papule or nodule, small in diameter, predominantly in the palms and soles and generally asymptomatic. Due to its morphologic variability, poromas are usually difficult to recognize, thus dermatoscopy becomes a useful aid in its diagnosis. We present the case of a male patient with a large tumour on his right leg, 40 mm in diameter, with dermatoscopic features consistent with nonpigmented poroma. Confirmatory diagnosis was made by incisional biopsy followed by the total surgical excision of the tumor.

Dermatoscopy: an auxiliary resource for the diagnosis of poroid neoplasms

Abstract: Poroid neoplasms are benign epithelial proliferations with eccrine sweat gland differentiation. They are a challenging diagnosis because of the clinical heterogeneity, being able to mimic several malignant neoplasms. They are classified into classic poroma, hidroacanthoma simplex, dermal duct tumor and poroid hidradenoma. Association of histological subtypes occurs in more than 25% of cases. We report a case of a combined poroid neoplasia of classical poroma and poroid hidradenoma, reviewing its dermatoscopic features.

Concomitant poroma and porocarcinoma

Abstract: Eccrine poromas and porocarcinomas are adnexal tumors derived from the sweat duct epithelium. However, eccrine poroma is benign in nature, whilst eccrine porocarcinoma is regarded as its malignant counterpart. We report the case of a man who presented simultaneously with an eccrine poroma and eccrine porocarcinoma. Both lesions had no clear distinctive features, enhancing the need of high-level clinical suspicion together with surgical excision and histopathology for prompt diagnosis confirmation.

Hidroacanthoma simplex: dermoscopy and cryosurgery treatment

Abstract: Hidroacanthoma simplex is a rare intraepidermal neoplasia that arises from the acrosyringial portion of the eccrine duct. Malignant transformation of hidroacanthoma simplex is reported in the literature and the treatment is performed with wide excision or Mohs micrographic surgery. We report the first case successfully treated with cryosurgery with a long-term follow up.

Características clínicas y dermatoscópicas del poroma ecrino / Clinical and dermatoscopic characteristics of the eccrine poroma

El poroma ecrino (PE) corresponde a una neoplasia anexial benigna originada de la porción intraepidérmica del conducto de las glándulas sudoríparas. Habitualmente se describe como nódulos eritematosos o color piel ubicados en región palmoplantar, pero sus características clínicas son muy variables. Se decriben los hallazgos clínicos y dermatoscópicos de una serie de casos de pacientes con PE. La dermatoscopia puede facilitar significativamente el diagnóstico clínico de la mayoría de los tumores de la piel, sin embargo el PE se caracteriza por un alto grado de variabilidad a la dermatoscopía. Habitualmente se describe un patrón vascula polimorfo con vasos glomerulares, en horquilla, y lineales irregulares con terminaciones semicirculares rodeados de un halo blanco a rosa en forma de caliz o flor de cerezo asociado a áreas rosadas blanquecinas sin estructuras similares a lo observado en melanoma amelanótico, carcinoma espinocelular entre otros tumores benignos y malignos. El PE puede exhibir características clínicas y dermatoscópicas polimórficas que pueden hacer difícil el diagnóstico y su diferenciación de otras neoplasias cutáneas.

Eccrine poroma (PE) is a benign adnexal neoplasm of the intraepidermal portion of the sweat gland duct. PE typically present as erythematous or flesh-colored nodules on the palms and soles, but the clinical features of PE are highly variable. Dermatoscopic and clinical findings of patients with EP are described. Dermoscopy may significantly improves the clinical diagnosis of most skin tumours, but PE is characterised by a high degree of dermoscopic variability. The main dermoscopic features described are polymorphous vascular pattern, whiteto- pink halo surrounding the vessels, pink-white structureless areas, vascular structures of glomerular, hairpin vessels, and linear irregular vessels, mimicking amelanotic melanoma, keratinising tumours and several benign and malignant tumors. Eccrine poroma may exhibit polymorphic clinical and dermoscopic features making it difficult to diagnosis and differentiate from other skin cancers.

Eccrine poroma and porocarcinoma on the same unusual location: report on two cases

Eccrine poroma is a benign adnexal tumour of the uppermost portion of the intraepidermal eccrine sweat gland duct and acrosyringium. Eccrine porocarcinoma is the malignant phenotype arising from the intraepidermal portion of the eccrine sweat gland duct epithelium or from pre-existing eccrine poroma. Both commonly occur in the palms or sides of the feet; these areas have a high concentration of eccrine sweat glands. We describe two respective cases of benign and malignant eccrine poroma on the scrotum, which entailed good excisional results.

Dermatoscopía del poroma ecrino: a propósito de un caso clínico / Dermoscopy of eccrine poroma: a case report

El poroma ecrino es un tumor benigno anexial raro. Clínicamente se presenta como un nódulo solitario rosado, asintomático, topografiado comúnmente en palmas y plantas. El diagnóstico clínico diferencial más importante se plantea con el melanoma amelanótico. La dermatoscopía ayuda en algunos casos a distinguir entre ellos. Se describe el caso de una paciente de 50 años que se presenta con un nódulo palmar derecho que a la dermatoscopia presenta estructuras vasculares solitarias, glomerulares, con áreas blanco rosadas sin estructuras y pequeñas erosiones. El diagnóstico histopatológico fue de poroma ecrino.

Eccrine poroma is a rare benign adnexal tumor. It usually, presents as an asymptomatic, solitary, pink nodule in palms and soles. Its main differencial diagnosis is amelanotic melanoma. Dermoscopy can improve the differentiation between them. We describe the case of a 50 year-old woman who presented with a nodule in the her right palm which at dermoscopy showed solitary vascular structures, glomerular vessels, pink white structureless areas and little erosions. The histopathologic diagnosis was eccrine poroma.