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hyaline membrane

Karan Lal, Travis J Morrell, Michael Cunningham, Patrick OʼDonnell, Nikki A Levin, Kristine M Cornejo
Cutaneous mixed tumor (chondroid syringoma) is the cutaneous counterpart of pleomorphic adenoma of salivary glands, comprised of both epithelial and mesenchymal components. Malignant transformation is exceptionally rare, with only a few cases reported. We report a case of a malignant cutaneous mixed tumor in an 86-year-old white man who presented with a pink indurated plaque on his left scapula. He had a history of nonmelanoma skin cancers, a stage IB malignant melanoma of a lower extremity and Gleason 4 + 3 prostate cancer treated with brachytherapy, external beam irradiation, and bicalutamide...
March 6, 2018: American Journal of Dermatopathology
Shaolei Ma, Yujie Wang, Xiangrong Zuo, Jing Yao, Quan Cao
OBJECTIVE: To explore the effect of acute respiratory distress syndrome (ARDS) induced by endotoxin on the right ventricular function in rats. METHODS: Sixty male Sprague-Dawley (SD) rats were randomly divided into normal saline (NS) control group and lipopolysaccharide (LPS) model group with 30 rats in each group. The rat model of ARDS was reproduced by intratracheal instillation of LPS 10 mg/kg after tracheotomy, and the rats in NS control group was intratracheally given the same volume of NS instead of LPS...
March 2018: Zhonghua Wei Zhong Bing Ji Jiu Yi Xue
G Ortiz, M Garay, D Mendoza, P Cardinal-Fernández
INTRODUCTION: Acute respiratory distress syndrome (ARDS) is an inflammatory lung disorder, and its pathological hallmark is diffuse alveolar damage (DAD). Given that open lung biopsy (OLB) can sometimes result in severe side effects, it is rarely performed in patients with ARDS. AIM: The aims of this study were to describe: (a) the rate of treatment change associated with the histological result; and (b) the incidence of side effects induced by OLB. DESIGN AND PATIENTS: A retrospective, single-center, descriptive observational study was carried out in Hospital Santa Clara (Bogotá, Colombia) from February 2007 to January 2014...
February 28, 2018: Medicina Intensiva
Martin S Taylor, Raghu R Chivukula, Laura C Myers, William R Jeck, Avinash Waghray, Purushothama R Tata, Martin K Selig, Walter J O'Donnell, Carol F Farver, B Taylor Thompson, Jayaraj Rajagopal, Richard L Kradin
Improved tools have led to a burgeoning understanding of lung regeneration in mice, but it is not yet known how these insights may be relevant to acute lung injury in humans. We report in detail two cases of fulminant idiopathic acute lung injury requiring extracorporeal membrane oxygenation in previously healthy young adults with acute respiratory distress syndrome, one of whom required lung transplantation. Biopsies showed diffuse alveolar injury with a striking paucity of alveolar epithelial regeneration, rare hyaline membranes, and diffuse contiguous airspace lining by macrophages...
February 21, 2018: American Journal of Pathology
Mehrdad Pourfathi, Maurizio Cereda, Shampa Chatterjee, Yi Xin, Stephen Kadlecek, Ian Duncan, Hooman Hamedani, Sarmad Siddiqui, Harrilla Profka, Jason Ehrich, Kai Ruppert, Rahim R Rizi
Acute respiratory distress syndrome (ARDS) is a major cause of mortality in critically ill patients. Patients are currently managed by protective ventilation and alveolar recruitment using positive-end expiratory pressure (PEEP). However, the PEEP's effect on both pulmonary metabolism and regional inflammation is poorly understood. Here, we demonstrate the effect of PEEP on pulmonary anaerobic metabolism in mechanically ventilated injured rats, using hyperpolarized carbon-13 imaging. Pulmonary lactate-to-pyruvate ratio was measured in 21 rats; 14 rats received intratracheal instillation of hydrochloric-acid, while 7 rats received sham saline...
February 23, 2018: Scientific Reports
Christian Sonne, Pall S Leifsson, Jens Søndergaard, Rune Dietz
Narwhals (Monodon monoceros) are at the top of the Arctic food web and therefore might biomagnify high total mercury (Hg) concentrations in organs and tissues. The aim of this study was to determine histopathology and Hg concentrations in liver and kidneys from 15 North East Greenland narwhals (3 subadult females, 8 adult females, 3 subadult males, and 1 adult male) and compare data with previous observations of 12 North West Greenland specimens (1 subadult female, 4 adult females, 1 subadult male, and 6 adult males)...
February 13, 2018: Journal of Toxicology and Environmental Health. Part A
Yifan Rao, Xiuzhu Sun, Na Yang, Fanyi Zhang, Xiaojing Jiang, Linhua Huang, Xiaogai Guo, Weihua Du, Haisheng Hao, Xueming Zhao, Qiuling Jiang, Yan Liu
Neonatal respiratory distress is a major mortality factor in cloned animals, but the pathogenesis of this disease is rarely investigated. In this study, four neonatal cloned cattle, born after full-term gestation, exhibited symptoms of neonatal respiratory distress syndrome (NRDS), which included symptoms of hyaline membrane disease as well as disordered surfactant homeostasis in their collapsed lungs. No differences in DNA methylation or histone modifications correlated with the suppressed SPB and SPC transcription observed in the cloned cattle group (P > 0...
February 1, 2018: Molecular Reproduction and Development
Rumi Hino, Noriko Motoi, Kazutoshi Toda, Aya Ebina, Keiko Yamada, Miyoko Higuchi, Mitsuyoshi Hirokawa, Yuichi Ishikawa
Hyalinizing trabecular tumor (HTT) is a rare low-grade tumor, and a prominent feature is the basement membranous stroma. We assume that such characteristic stromal findings of HTT are related to calcium deposition, and examined HTT samples by von Kossa special staining. There has been no report describing von Kossa special staining for such stroma. We collected 12 cases of HTT and 30 cases of papillary thyroid carcinoma (PTC) that had matched age, gender, tumor size, and surgical procedure characteristics as a control group...
January 24, 2018: Pathology International
Fernanda Gimenez de Souza, Beatriz Luci Fernandes, Carmen Lucia Kuniyoshi Rebelatto, Alessandra Melo de Aguiar, Letícia Fracaro, Paulo Roberto Slud Brofman
Objective: To evaluate the ability of the eluate from fibrin-rich plasma (FRP) membrane to induce proliferation and differentiation of isolated human adipose-derived stem cells (ASCs) into chondrocytes. Method: FRP membranes were obtained by centrifugation of peripheral blood from two healthy donors, cut, and maintained in culture plate wells for 48 h to prepare the fibrin eluate. The SCATh were isolated from adipose tissue by collagenase digestion solution, and expanded in vitro...
January 2018: Revista Brasileira de Ortopedia
Angel Fernandez-Flores, David Samuel Cassarino
Malignant cutaneous mixed tumor (CMT) is a very rare adnexal tumor with biphasic differentiation. In rare cases, a benign CMT (chondroid syringoma) undergoes malignant transformation. Sebaceous differentiation in a cutaneous malignant mixed tumor has not been previously reported. We present a malignant CMT with sebaceous differentiation, which occurred on the scalp of an 81-year-old man. The tumor showed epithelial elements composed of relatively small and bland-appearing ductal and cord-like structures lined by small, cuboidal-shaped adnexal cells, with a few large, dilated gland-like spaces lined by larger, apocrine-appearing cells with abundant eosinophilic-staining cytoplasm...
2017: Romanian Journal of Morphology and Embryology, Revue Roumaine de Morphologie et Embryologie
Saowarat Snidvongs, Rod S Taylor, Alia Ahmad, Simon Thomson, Manohar Sharma, Angela Farr, Deborah Fitzsimmons, Stephanie Poulton, Vivek Mehta, Richard Langford
BACKGROUND: Pain of lumbar facet-joint origin is a common cause of low back pain in adults and may lead to chronic pain and disability, with associated health and socioeconomic implications. The socioeconomic burden includes an inability to return to work resulting in loss of productivity in addition to direct and indirect health-care utilisation costs. Lumbar facet-joints are paired synovial joints between the superior and inferior articular processes of consecutive lumbar vertebrae and between the fifth lumbar vertebra and the sacrum...
December 2017: Health Technology Assessment: HTA
Sebastian Mühl, Jan Ehrchen, Dieter Metze
Imatinib mesylate (Glivec; Novartis AG, Basel, Switzerland) is a tyrosine kinase inhibitor which is used in the treatment of oncologic diseases like chronic myeloid leukemia and gastrointestinal stroma tumor (GIST). Among cutaneous side effects, bullous reactions are rare. The authors describe the case of a 66-year-old woman developing blistering and skin fragility on her hands, foot, lower legs, and back after intake of imatinib for treatment of GIST. Biopsy showed vacuolar alteration at the dermoepidermal junction (DEJ) associated with a few lymphocytes and a subepidermal blister...
November 22, 2017: American Journal of Dermatopathology
Nami Takada, Mitsuyoshi Hirokawa, Chiho Ohbayashi, Takeshi Nishikawa, Tomoo Itoh, Naoko Imagawa, Tetsunari Oyama, Tadashi Handa, Tadashi Hasegawa, Shintaro Sugita, Akiko Murata, Akira Miyauchi
Hyalinizing trabecular tumour (HTT) immunohistochemically shows cell membranous immunoreactivity for MIB-1. This aberrant immunoreactivity is an important factor for the diagnosis of HTT. However, fully automated stainers frequently fail to confirm the immunoreactivity. The aim of this study is to investigate the cause of false negative cell membranous immunoreactivity for MIB-1 in HTT using fully automated stainers, to determine potential reasons for the problem, and to establish methods confirming cell membranous immunoreactivity for MIB-1 in HTT...
February 26, 2018: Endocrine Journal
Thomas M Ulbright
Accurate diagnosis of primary and metastatic tumours is essential in testicular cancer. While many cases are straightforward, some pose difficulties, especially when variant morphologies occur. Seminoma with 'atypical' features, including increased nuclear pleomorphism and crowding and greater cytoplasmic density with loss of membrane definition, mimics embryonal carcinoma, although ancillary features (fibrous septa, lymphocytes) and immunohistochemistry are of great help. Other deceptive seminoma features include prominent to exclusive intertubular growth, microcystic/tubular patterns, and signet-ring tumour cells...
November 9, 2017: Pathology
Tetsuro Kurotaki, Yuki Tomonari, Junko Sato, Takeshi Kanno, Minoru Tsuchitani
A 20-week-old male Sprague Dawley rat noted with decreased body weight, dyspnea, and anorexia beginning 2 days before death was necropsied in the recovery period of a sub-chronic toxicity study. The heart was severely enlarged (30 × 20 × 20 mm), 3-4 times larger than normal, with an approximately 6 mm wide defect in the upper, membranous portion of the ventricular septum. Both ventricles measured 4 mm in thickness, and the right ventricle was 4 times thicker than normal. According to a microscopic examination, the myocardial fibers were severely hypertrophic in the right ventricle and mildly hypertrophic in the left ventricle and septum...
October 2017: Journal of Toxicologic Pathology
Masao Hamamura, Takafumi Oshikata, Koshirou Katoku, Minoru Tsuchitani, Ryoji Yamaguchi
Alpha2u-globulin is an adult male rat-specific protein that accumulates spontaneously or inductively in the renal proximal tubular epithelium and forms microscopically observable deposits, which are generally referred to as "hyaline droplets," whereas a specific type of deposits is referred to as "eosinophilic bodies" by Japanese toxicologic pathologists. We compared hyaline droplets and eosinophilic bodies using special stains including immunostaining for α2u-globulin and lysosome-associated membrane protein in spontaneously occurring and d-limonene-induced cases...
October 2017: Journal of Toxicologic Pathology
Marcelo G Horenstein, Marina P Sandoval, Yungtai Lo, Jack Jacob
There are 36 cases of complex poroid tumors with folliculosebaceous and apocrine differentiation reported in the literature. The authors evaluated 111 poroid tumors including 63 typical eccrine poromas and 48 poroid tumors with folliculosebaceous elements. Folliculosebaceous poroid tumors (FSPT) had basaloid and squamous cells (100%), ducts with steatocystoma-like cuticles and holocrine secretions (89.6%), infundibular follicular structures (66.7%), and entrapped sebocytes (56.3%). No definite apocrine decapitation secretions in FSPT were found...
November 1, 2017: American Journal of Dermatopathology
Silvia Posada Arias, Paola Rey-Suárez, Andrés Pereáñez J, Cristian Acosta, Mauricio Rojas, Lucilene Delazari Dos Santos, Rui Seabra Ferreira, Vitelbina Núñez
Myotoxic phospholipases A₂ (PLA₂) are responsible for many clinical manifestations in envenomation by Bothrops snakes. A new myotoxic acidic Asp49 PLA₂ (BaCol PLA₂) was isolated from Colombian Bothrops asper venom using reverse-phase high performance liquid chromatography (RP-HPLC). BaCol PLA₂ had a molecular mass of 14,180.69 Da (by mass spectrometry) and an isoelectric point of 4.4. The complete amino acid sequence was obtained by cDNA cloning (GenBank accession No. MF319968) and revealed a mature product of 124 amino acids with Asp at position 49...
October 26, 2017: Toxins
Xiaoyan Cui, Shi Wei
Ductal or lobular carcinoma in situ (DCIS/LCIS) can rarely arise from sclerosing adenosis (SA). The combination of cytologically malignant cells and the infiltrative growth pattern may make it challenging to distinguish it from an invasive carcinoma. The authors reviewed 50 consecutive cases of CIS involving SA to seek the salient histologic characteristics in order to prevent overdiagnosis. The features commonly seen with CIS were the lobular configuration at low magnification (94%), uninvolved SA in neighboring tissue (84%), at least focally identifiable myoepithelial cells on H&E-stained sections (76%), separate foci of unequivocal CIS (58%), associated microcalcifications (54%), and hyaline basement membrane surrounding tumor cell nests (48%)...
September 2017: Annals of Clinical and Laboratory Science
Paula Pereira de Paiva, Mariana Cruz Delcorso, Valquíria Aparecida Matheus, Sonia Claudia do Nascimento de Queiroz, Carla Beatriz Collares-Buzato, Sarah Arana
AIM: The aim of this work was to evaluate the sensitivity of Pacu fingerlings (Piaractus mesopotamicus) by measuring the effects of median lethal concentration (LC50) of atrazine (ATZ - 28.58 mg/L) after acute exposure (up to 96 h). MATERIALS AND METHODS: The fish were exposed to the LC50 of ATZ for 96 h (28.58 mg/L) in a static system. During the experiment, the fingerlings were randomly distributed in four glass tanks (50 L) containing dechlorinated water. Four glass tanks were for the control group, and four were for the ATZ-exposed group (n=4 per glass tank), given a total number of 16 animals tested per group...
September 2017: Veterinary World
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