Syringoma-like eccrine sweat duct proliferation induced by radiation

Syringomatous dermatitis: a myth or an existing entity?

Syringoma is rare disease that in classical variant occurs mainly on lower eyelids. In previously published researches, there is increasing evidence that eruptive syringomas must be discussed as an inflammatory dermal reaction pattern. And there was a proposal to change a name from eruptive syringoma to reactive syringomatous proliferation in appropriate cases. We conduct retrospective study on histopathological archived material to study the histopathological findings in cases of eruptive syringomas and correlate it with hypothesis that eruptive syringomas is not true adnexal neoplasms "de novo" but a hyperplastic response of the acrosyringium to an inflammatory process.According to obtained data and literature correlation, we can conclude that there is apparent diversity in eruptive syringomas. Part of cases can be calculated as neoplastic lesions arising "de novo," and another part as reactive syringomatous proliferation due to preceding cutaneous inflammatory process. Thus, term "eruptive syringoma" may be changed in appropriate cases to a "reactive syringomatous proliferation."Clinical variants of eruptive syringoma with evidence of underlying inflammatory process may be more responsive on types of treatments used for inflammatory disorders. Thus, more global clinicopathological correlative researches should be conducted and classification with terminology should be appropriately changed.

Serum Proteomics Combined with Metabolomics Analysis Explore the Molecular Biological Characteristics of Eruptive Syringoma

Background

Eruptive syringoma (ES) is a clinical variant of the appendageal tumor syringoma. Around 75% of ES arise in the head or neck, which makes them unsightly. ES is common in patients with amyloidosis, diabetes, and Down's syndrome, suggesting that it may be associated with potential systemic effects. ES is a rare tumor with the unclear pathogenesis and no effective treatment.

Methods

A PubMed search of ES was conducted. Plasma samples of patients with ES were acquired from the Department of Dermatology at Xi'an Jiaotong University's Second Affiliated Hospital. After removing highly abundant proteins, plasma samples were subjected to proteomics and metabolomics analysis using liquid chromatography-tandem mass spectrometry (LC-MS/MS).

Results

LC-MS/MS revealed 71 differentially expressed proteins and 18 differentially abundant metabolites. The functional analysis highlighted the importance of complement binding, coagulation, secretory granules and vesicle lumen. Further, the study revealed 15 hub genes associated with FGG, GC, APOE, FGA, FGB, C4A, C3, CRP, C4B, FLNA, TAGLN2, ANXA5, MYL6, MYL12B, and TLN1 organized into three clusters. The seed genes in each cluster were GC, FLNA, and MYL6. In addition, glycol metabolism was associated with variable abundance of serum metabolites, which explains the relatively high rate of ES among diabetics.

Conclusion

This study suggests that immunological inflammation and tumor glycol metabolism may play significant role in the pathophysiology of ES.

Dermoscopy Of The Month: Dermoscopic Finding of Pigment Network in Lesions of Eruptive Syringoma

Syringoma is a benign adnexal tumor derived from intraepidermal eccrine ducts. The usual presentation of syringoma is a small smooth skin-colored, yellowish or brownish papule with flattened or rounded top. Eruptive syringoma is a rarely reported form, where lesions are numerous and occur in successive crops. A case of a 57-year-old Caucasian male with a twenty four-year history of multiple asymptomatic, erythematous and brownish papules, predominantly over the anterior aspect of the trunk is presented. All lesions appeared after prolonged sun exposures within a few days and persisted without further changes afterwards. Contact non-polarized dermoscopy showed a fine light brown, regular pigment network on a light pink background, being the same in all lesions. History of the disease, clinical finding and dermoscopy were inconclusive, and biopsy was performed. Histopathology revealed signs of syringoma. Dermoscopic finding was thought to be intriguing and therefore is discussed in this paper.

Unilateral Ulcerating Clear-Cell Syringomas Involving Left Groin in a Non-Diabetic Woman - Report of a Rare Presentation

Clear-cell syringomas, a rare histologic variant of syringomas, frequently coexist with diabetes mellitus. Clinically, it presents as skin colored papules distributed symmetrically around periorbital region. However, asymmetrical distribution of syringomas is rare and much rarer is the ulceration in such syringomas. Ulceration in such asymmetrical syringomas has not been reported so far. Herein, we report ulceration of clear-cell syringomas involving left groin in a middle aged non-diabetic woman.

Generalized eruptive syringoma

Eruptive syringoma is a very rare variant of syringoma. It is a benign adnexal tumor of the intraepidermal portion of eccrine sweat ducts. Here we report a 32-year-old female presented with classical asymptomatic eruptive syringomas involving her face and extremities.