Pseudoepitheliomatous Hyperplasia: A Diagnostic Dilemma

Chauhan, Anubhav; Gupta, Lovely; Chauhan, Shveta

doi:10.4103/ijmpo.ijmpo_198_16

Cited by 3 publications

(1 citation statement)

References 5 publications

(5 reference statements)

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“…Even in the case of mixed solvents, it is feasible to calculate the solubility parameters of the mixture if the two solvents do not produce a strong complex. According to previous research, DMF and DMSO form a weak association but its effect on properties such as viscosity, dielectric constant, density and heat capacity is negligible . The overall and individual solubility parameters of PAN, DMF, DMSO and their mixtures are listed in Table .…”

Section: Resultsmentioning

confidence: 99%

The effect of dimethylsulfoxide on the dissociation process of physical complexes of polyacrylonitrile in N,N‐dimethylformamide

Eom

Kim

2017

Polymer International

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The physical properties and gelation behavior of polyacrylonitrile (PAN) solutions were investigated in mixed solvents of N,N‐dimethylformamide (DMF) and dimethylsulfoxide (DMSO). For the individual solubility parameters, DMSO had the polar term closer to PAN than DMF. Small‐angle X‐ray scattering profiles and Fourier transform infrared spectra of 20 wt% PAN solutions confirmed that the internal structure and intermolecular complexes between nitrile groups were broken up by the DMSO molecules. The slope of Cole–Cole plot, a measure of the solution heterogeneity, increased with the mole fraction of DMSO (XDMSO) via three distinct zones. The homogenization was particularly noticeable in Zone 1 (0.0 < XDMSO < 0.4) and Zone 3 (0.7 < XDMSO < 1.0). The Huggins constant and UV‐visible absorption at 268 nm of dilute solutions decreased sharply above XDMSO of 0.7 in Zone 3. This indicated a marked increase of PAN solubility by dissociating the intramolecular complexes between nitrile groups. In Zone 1, the storage modulus of 20 wt% PAN solutions decreased but loss modulus remained almost constant with XDMSO at lower frequency below 1 rad s−1, indicating the weakening of the true entanglement points of the intermolecular complexes. The mechanism indicated that the intermolecular complexes between nitrile groups were dissociated by DMSO earlier than the intramolecular ones. © 2017 Society of Chemical Industry

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Section: Resultsmentioning

confidence: 99%

The effect of dimethylsulfoxide on the dissociation process of physical complexes of polyacrylonitrile in N,N‐dimethylformamide

Eom

Kim

2017

Polymer International

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Disoriented collagen fibers and disorganized, fibrotic orbicularis oris muscle fiber with mitochondrial myopathy in non-syndromic cleft lip

Noor

Shah

Zin

et al. 2022

Archives of Oral Biology

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Three cases of pseudoepitheliomatous hyperplasia mimicking squamous cell carcinoma of the foot: A case series

Arulselvan,

Muthurathinam

2024

Journal of Current Research in Scientific Medicine

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Pseudoepitheliomatous hyperplasia (PEH) is a benign condition characterized by hyperplasia and proliferation of the epidermis and adnexal epithelium which can mimic squamous cell carcinoma (SCC). In our first case, a 55-year-old female with a prior history of split skin graft presented with dark verrucous growth over the graft site with a nonhealing ulcer of 3 cm × 2 cm seen over the ventral aspect of the left foot. Our second case, a 59-year-old male with a prior history of split skin grafting presented with dark verrucous growth and pain over the right forefoot for 3 months. The third case, a 58-year-old man with diabetic foot ulcer with verrucous growth over the toes. In all the cases, the biopsy was done and diagnosed to be PEH. We report this case series of PEH for the proper distinction from the SCC of the skin.

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Pseudoepitheliomatous Hyperplasia: A Diagnostic Dilemma

Cited by 3 publications

References 5 publications

The effect of dimethylsulfoxide on the dissociation process of physical complexes of polyacrylonitrile in N,N‐dimethylformamide

The effect of dimethylsulfoxide on the dissociation process of physical complexes of polyacrylonitrile in N,N‐dimethylformamide

Disoriented collagen fibers and disorganized, fibrotic orbicularis oris muscle fiber with mitochondrial myopathy in non-syndromic cleft lip

Three cases of pseudoepitheliomatous hyperplasia mimicking squamous cell carcinoma of the foot: A case series

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