scholarly journals Subcutaneous Phaeohyphomycosis of Foot in an Immunocompetent Host

2011 ◽  
Vol 3 (02) ◽  
pp. 122-124 ◽  
Author(s):  
Devesh Mishra ◽  
Maneesh Singal ◽  
Mahaveer Singh Rodha ◽  
Arulselvi Subramanian

ABSTRACTWe report a case of subcutaneous phaeohyphomycosis of foot, which is a mycotic disease that produces brown pigmented hyphae, pseudohyphae and yeast form in combination. The patient was immunocompetent and had injury 23 years before, and developed a non healing foot ulcer which was clinically suspected as tuberculous or carcinomatous etiology. Local wide excision was done and sent in formalin for histopathological examination. Microscopically pigmented septate, hyphae and yeast forms were identified on hematoxylin and eosin stained sections which were confirmed by special stains such as periodic acid-Schiff and Gomori’s methenamine silver stains.

2020 ◽  
Vol 13 (2) ◽  
pp. e233020
Author(s):  
Pradeep Kumar Mada ◽  
Daniel Alexander Saldaña Koppel ◽  
Majd Al Shaarani ◽  
Andrew Stevenson Joel Chandranesan

Primary cutaneous aspergillosis (PCA) occurs through inoculation of fungal spores directly into the skin from the environment through disrupted skin such as in burns, surgery or penetrating trauma patients. Most cases reported in literature were in the immunocompromised, rarely in immunocompetent patients. The characteristic lesion of cutaneous aspergillosis is a black eschar on a red plaque, or nodule at the site of skin injury. The diagnosis of PCA can be made by identifying hyphal forms on routine H&E staining or special stains such as periodic acid-Schiff or Gomori methenamine-silver stains on skin biopsy and by fungal cultures. We report a case of an 80-year-old farmer who developed cutaneous aspergillosis after a surgical procedure without any systemic spread. The diagnosis was made by histopathology and tissue fungal cultures. He was treated with incision and drainage followed by oral voriconazole for 4 weeks; which led to clinical recovery.


1982 ◽  
Vol 19 (7_suppl) ◽  
pp. 93-103 ◽  
Author(s):  
G. Migaki ◽  
R. E. Schmidt ◽  
J. D. Toft ◽  
A. F. Kaufmann

Lesions of candidiasis, mucormycosis (phycomycosis), entomophthoramycosis, geotrichosis, cryptococcosis, paracoccidioidomycosis and coccidioidomycosis have been reported in the alimentary tract of nonhuman primates. Candidiasis and mucormycosis were reported most often. Both Old and New World monkeys and great apes are susceptible; infection is rare in prosimians. Ulcers and necrosis of the mucosa of the alimentary tract are the principal gross lesions. A granulomatous inflammatory process occurs in which the fungi are visible histologically on hematoxylin and eosin (HE)-stained sections, but they are seen and characterized better when stained with periodic acid-Schiff (PAS) or Gomori methenamine silver (GMS) techniques. Cultural or immunofluorescence studies, or both, are necessary for specific identification of the fungi. Immunosuppression is suggested as a predisposing factor in certain mycotic diseases.


Author(s):  
Wail Fayez Nasr ◽  
Samir S Sorour ◽  
Mohammed K Mobasher ◽  
Hesham R Abd El Aziz

ABSTRACT Objectives The aim of this study is to assess the incidence of tonsillomycosis in chronic tonsillitis on histopathological basis post-tonsillectomy in children. Study design Cohort study. Level of evidence Level II. Setting Ter tiary University Hospital, Department of Otorhinolaryngology. Materials and methods This study included 75 cases of children suffering from chronic tonsillitis (43 females and 32 males). On assessment of the clinical condition of the children with history taking, clinical examination, and preoperative investigation, post-tonsillectomy tonsils are placed in a separate container in 10% formol saline, and then are sent for histopathological examination using hematoxylin and eosin and periodic acid–Schiff (PAC). Results The obtained result had 31.3% of tonsils (47/150) with histopathological evidence of fungal invasion of tonsillar tissue with immune reaction and the presence of chronic inflammatory cells. After statistical analysis of the collected crude data, we found that results have come in accordance with previous studies. Conclusion Tonsillomycosis is a cause of chronic tonsillitis. Haphazard use of antibiotics and dental caries has a significant predisposing role in tonsillomycosis. Neutropenia can be considered as an indicator for tonsillomycosis. It is considerable in hypertrophic tonsils. How to cite this article Nasr WF, Sorour SS, Mobasher MK, Abd El Aziz HR. Chronic Tonsillitis: A Recent Histopathological Study. Int J Otorhinolaryngol Clin 2016;8(1):1-5.


2021 ◽  
Author(s):  
Nasar Alwahaibi ◽  
Buthaina Al Dhahli ◽  
Halima Al Issaei ◽  
Loai Al Wahaibi ◽  
Shadia Al Sinawi

AbstractIn the routine laboratory, 10% neutral buffered formalin (NBF) is the fixative of choice. However, formalin is a human carcinogen. To the best of our knowledge, neutral honey, not natural or artificial honey, has not been tested to fix histological tissues. This study aimed to examine the efficiency of neutral buffered honey and other types of honey fixatives to fix histological tissues. The most two natural common Omani honey were used as fixatives, namely Sumar and date. We tested samples of rat liver, kidney, and stomach. Nine types of fixatives were used. All tissues were treated equally. The evaluation was performed blindly by three senior biomedical scientists who work in a histopathology laboratory. Hematoxylin and eosin showed adequate staining in all groups when compared to 10% NBF. The intensity and specificity of Jones Methenamine silver stain in 10% Sumer and Date honey and 10% alcoholic Sumer honey showed similar findings of 10% NBF. The specificity and intensity of all groups for Periodic acid–Schiff were comparable with 10% neutral buffered formalin accepts for 10% Sumer honey and 10% Alcoholic Date honey. However, all honey groups showed weak staining for the reticulin fibers using Gordon and Sweets method. Vimentin showed comparable findings with 10% NBF as there were no significant differences. The findings of this study are promising. Further in depth research on honey as a possible safe substitute fixative for formalin should be conducted.


2020 ◽  
Vol 138 ◽  
pp. 237-246 ◽  
Author(s):  
J Řehulka ◽  
A Kubátová ◽  
V Hubka

In this study, spontaneous swim bladder mycosis was documented in a farmed fingerling rainbow trout from a raceway culture system. At necropsy, the gross lesions included a thickened swim bladder wall, and the posterior portion of the swim bladder was enlarged due to massive hyperplasia of muscle. A microscopic wet mount examination of the swim bladder contents revealed abundant septate hyphae, and histopathological examination showed periodic acid-Schiff-positive mycelia in the lumen and wall of the swim bladder. Histopathological examination of the thickened posterior swim bladder revealed muscle hyperplasia with expansion by inflammatory cells. The causative agent was identified as Phoma herbarum through morphological analysis and DNA sequencing. The disease was reproduced in rainbow trout fingerlings using intraperitoneal injection of a spore suspension. Necropsy in dead and moribund fish revealed extensive congestion and haemorrhages in the serosa of visceral organs and in liver and abdominal serosanguinous fluid. Histopathological examination showed severe hepatic congestion, sinusoidal dilatation, Kupffer cell reactivity, leukostasis and degenerative changes. Fungi were disseminated to the liver, pyloric caeca, kidney, spleen and heart. Although infections caused by Phoma spp. have been repeatedly reported in fish, species identification has been hampered by extensive taxonomic changes. The results of this study confirmed the pathogenicity of P. herbarum in salmonids by using a reliably identified strain during experimental fish infection and provides new knowledge regarding the course of infection.


Author(s):  
Elia Shazniza Shaaya ◽  
Siti Atiqah Abdul Halim ◽  
Ka Wen Leong ◽  
Kevin Boon Ping Ku ◽  
Pei Shan Lim ◽  
...  

Background:Candida chorioamnionitis is rarely encountered, even though vulvovaginal candidiasis incidence is about 15%. Interestingly, it has characteristic gross and histological findings on the umbilical cord that are not to be missed. Case Report: We report two cases of Candida chorioamnionitis with presence of multiple yellowish and red spots of the surface of the umbilical cord. Microscopically, these consist of microabscesses with evidence of fungal yeasts and pseudohyphae. The yeasts and pseudohyphae were highlighted by periodic acid– Schiff and Grocott methenamine silver histochemical stains. Both cases were associated with a history of gestational diabetes mellitus. Discussion: Peripheral funisitis is a characteristic feature of Candida chorioamnionitis. It is associated with high risk of adverse perinatal and neonatal outcomes, such as preterm delivery, stillbirth and neonatal death. We recommend careful examination of the umbilical cord of mothers with gestational diabetes mellitus.


2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Kevin de Haan ◽  
Yijie Zhang ◽  
Jonathan E. Zuckerman ◽  
Tairan Liu ◽  
Anthony E. Sisk ◽  
...  

AbstractPathology is practiced by visual inspection of histochemically stained tissue slides. While the hematoxylin and eosin (H&E) stain is most commonly used, special stains can provide additional contrast to different tissue components. Here, we demonstrate the utility of supervised learning-based computational stain transformation from H&E to special stains (Masson’s Trichrome, periodic acid-Schiff and Jones silver stain) using kidney needle core biopsy tissue sections. Based on the evaluation by three renal pathologists, followed by adjudication by a fourth pathologist, we show that the generation of virtual special stains from existing H&E images improves the diagnosis of several non-neoplastic kidney diseases, sampled from 58 unique subjects (P = 0.0095). A second study found that the quality of the computationally generated special stains was statistically equivalent to those which were histochemically stained. This stain-to-stain transformation framework can improve preliminary diagnoses when additional special stains are needed, also providing significant savings in time and cost.


2018 ◽  
Vol 38 (7) ◽  
pp. 1394-1404
Author(s):  
Lorena F. Silva ◽  
Guilherme R. Blume ◽  
Rômulo S.A. Eloi ◽  
Jaqueline A. Lemos ◽  
Anahí S. Silva ◽  
...  

RESUMO: Mãos e pés de cães são comumente afetados por lesões neoplásicas e não neoplásicas. Estas alterações podem apresentar prognóstico histopatológico ou clínico ruim e a amputação tende a ser o tratamento de escolha. Estudos prévios avaliando a prevalência e os aspectos clínicopatológicos de alterações digitais em cães têm sido realizados em outros países, entretanto trabalhos similares não foram realizados no Brasil. O objetivo do presente estudo foi descrever e caracterizar histologicamente as lesões das mãos e pés de cães. Amostras de 105 lesões tumoriformes das mãos e pés de cães foram avaliadas. Essas amostras foram coletadas entre 2003 e 2016 e foram obtidas de três laboratórios brasileiros de diagnóstico veterinário. Todos espécimes foram fixados em formol tamponado 10%, processados rotineiramente e corados por hematoxilina-eosina. Adicionalmente, as colorações de azul de toluidina, Brown e Breen, periodic acid Schiff (PAS), Grocott Methenamine Silver (GMS) e Ziehl Neelsen foram utilizados em casos específicos. Imuno-histoquímica foi realizada usando os anticorpos anti-Leishmania spp., anti-CD117, anti-CD79, anti-CD3, anti-Melan A, anti-lisozima, anti-Pancytokeratin AE1/AE3 e anti-vimentina. Os neoplasmas (62,9%) foram as alterações mais frequentes, seguidas por inflamações (19%) e outras alterações (18,1%). Entre os neoplasmas, 40,9% foram mesenquimais, 39,4% epiteliais e 19,7% de células redondas. Todos os neoplasmas de células redondas e a maioria dos epiteliais e mesenquimais eram malignos. Não se observou predileção de prevalência dos neoplasmas em relação ao sexo. As raças Labrador Retriever, Schnauzer, Teckel, SRD, Pastor Alemão, Rottweiler e Pit Bull foram as mais afetadas. Fila Brasileiro, Pit Bull e Schnauzer tiveram alta incidência de neoplasmas mesenquimais, epiteliais e de células redondas, respectivamente. Inflamação foi mais comumente observada em cães Labrador Retriever e as outras alterações em Teckel, Labrador Retriever e SRD. A idade e o peso médio dos animais afetados foram de 8,4 anos e 28,5 kg, respectivamente. O diâmetro médio das lesões tumoriformes foi de 2,5 cm e as lesões neoplásicas apresentaram as maiores médias. As lesões ocorreram principalmente em animais de pelagem amarela. A maioria das biópsias incisionais (56,4%) e amputações (85,3%) consistiram de neoplasmas. O principal membro afetado foi o torácico direito e o dígito foi a estrutura anatômica acometida mais frequentemente. Carcinoma de células escamosas (14,2%) foi o neoplasma mais frequente, seguido do mastocitoma (7,6%), melanoma (7,6%) e sarcoma indiferenciado (7,6%). Em metade dos casos de inflamação, a lesão acometeu o folículo piloso e derme adjacente, e o infiltrado foi predominantemente piogranulomatoso ou lnfoplasmocítico. Cistos foliculares, calcinose circunscrita e acrocordoma foram as principais lesões não neoplásicas e não inflamatórias diagnosticadas.


2020 ◽  
Vol 27 (5) ◽  
pp. 53-61
Author(s):  
Abdullah Saleh Alkhamiss

Background: This study was undertaken to evaluate the preferred method (Giemsa or periodic acid Schiff-Alcian blue [PAS-AB] stains) of detecting Helicobacter pylori (H. pylori) in gastric mucosal biopsies in terms of sensitivity, specificity and applicability. To the best of my knowledge, this is the first report comparing Giemsa and PAS-AB staining for the detection of H. pylori in such biopsies. Methods: The formalin-fixed paraffin-embedded blocks of 49 gastric biopsies from different patients were collected from the archive of anatomical pathology at King Abdulaziz Medical City, National Guard, Riyadh, Saudi Arabia. From each block, three slides were prepared and analysed using the hematoxylin and eosin (H&E), Giemsa and PAS-AB stains to detect the presence/absence of H. pylori, and the results were compared in terms of sensitivity, specificity and applicability. Results: The majority of the biopsies in this study showed antrum-type gastric mucosa. Only 15 biopsies showed active gastritis, whereas the rest showed chronic gastritis. Three biopsies showed intestinal metaplasia. All were detected by PAS-AB stain, but only two-thirds were detected by H&E stain. Fifteen gastric biopsies showed H. pylori infection in general and in 13 of them, active gastritis cases were discovered. Fourteen out of these 15 H. pylori infection cases were detected by Giemsa stain, whereas only 13 cases were detected by H&E stain. PAS-AB stain showed the worst results since it demonstrated only 40% sensitivity and 67.65% specificity in H. pylori detection. Conclusion: Giemsa stain has better sensitivity and specificity in gastric H. pylori infection detection than PAS-AB. Therefore, using PAS-AB stain to detect H. pylori infection is not recommended.


1962 ◽  
Vol 203 (4) ◽  
pp. 676-680 ◽  
Author(s):  
Reagan H. Bradford ◽  
R. Palmer Howard ◽  
Walter Joel ◽  
Jerry Puls ◽  
M. R. Shetlar

Parathyroid extract, a total of 860 units, has been administered to rats in small, progressively increasing doses over a period of 12 days. The effects on serum protein, total glycoprotein, glycoprotein/protein ratio, calcium, individual protein and glycoprotein fractions, and renal calcification have been presented. Kidney sections from each rat were studied by histochemical techniques for calcification, neutral polysaccharide, and acid mucopolysaccharide. The serum total glycoprotein, glycoprotein/protein ratio, and calcium were found to be elevated. The serum albumin was decreased, whereas the globulin fractions were essentially unchanged. The globulin glycoprotein hexose, mostly α1-globulin, was increased; albumin glycoprotein hexose showed a somewhat less consistent increase. A "precalcification" periodic acid-Schiff-staining intraluminal material was demonstrated in the kidney after parathyroid extract treatment for 4 days. This was followed approximately 2 days later by Alcian blue-staining material and calcification demonstrable by hematoxylin and eosin and by Kóssa staining techniques. This has been interpreted as suggesting a glycoprotein-containing lesion which precedes calcification.


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