Complete Cap Research Articles

Epidemiology and Genetic Characterization of Porcine Parvovirus 7 Recovered from Swine in Hunan, China.

Porcine parvovirus 7 (PPV7) was first discovered in swine in 2016, and PPV7 infection has been detected in aborted pig fetuses and in sows that experienced reproductive failure. The objective of this study was to report the prevalence and genetic characterization of PPV7 in Hunan, China. Seventy of the four hundred and twenty-two (16.6%) serum, semen, and tissue samples collected from pigs were positive for PPV7. One complete PPV7 strain and eighteen complete cap gene sequences were obtained; nucleotide and amino acid identity among the nineteen Cap sequences were 88.1-99.4% and 88.1-100%, respectively. They shared identity with previously discovered sequences ranging from 86.6 to 98.9% and 83.7 to 99.8% at the nucleotide- and amino acid-level, respectively. The phylogenetic tree analysis exhibited that PPV7 strains had two major groups based on the presence or absence of five amino acid (181-185) insertions on the Cap protein. Analysis of the Cap protein demonstrated that PPV7 Cap had significant variability, implying that PPV7 evolved at high substitution rates. Substantial variations of that PPV7 Cap may enable the emergence of newly mutated capsid profiles due to its viral adaptation to host responses. Furthermore, antigenic alteration owing to PPV7 Cap protein amino acid mutations at immune epitopes may enable viruses to escape from the host's immune system. This study determined the prevalence and genetic characteristics of PPV7 circulating in swine in Hunan, China, and provided the impetus and basis to further investigate the pathogenicity and epidemiology of PPV7.

Small complete caps in PG(4n+1,q)${\rm PG}(4n+1, q)$

In this paper we prove the existence of a complete cap of PG ( 4 n + 1 , q ) ${\rm PG}(4n+1, q)$ of size 2 ( q 2 n + 1 − 1 ) / ( q − 1 ) $2(q^{2n+1}-1)/(q-1)$ , for each prime power q > 2 $q>2$ . It is obtained by projecting two disjoint Veronese varieties of PG ( 2 n 2 + 3 n , q ) ${\rm PG}(2n^2+3n, q)$ from a suitable ( 2 n 2 − n − 2 ) $(2n^2-n-2)$ -dimensional projective space. This shows that the trivial lower bound for the size of the smallest complete cap of PG ( 4 n + 1 , q ) ${\rm PG}(4n+1, q)$ is essentially sharp.

MP22-06 THE IMPACT OF PROSTATE CANCER DISEASE PROGRESSION AND SALVAGE OR ADJUVANT TREATMENT ON ARTIFICIAL URINARY SPHINCTER DEVICE OUTCOMES

You have accessJournal of UrologyCME1 May 2022MP22-06 THE IMPACT OF PROSTATE CANCER DISEASE PROGRESSION AND SALVAGE OR ADJUVANT TREATMENT ON ARTIFICIAL URINARY SPHINCTER DEVICE OUTCOMES Shree Agrawal, Hanson Zhao, Joao Pedro Emrich Accioly, Hadley Wood, and Kenneth Angermeier Shree AgrawalShree Agrawal More articles by this author , Hanson ZhaoHanson Zhao More articles by this author , Joao Pedro Emrich AcciolyJoao Pedro Emrich Accioly More articles by this author , Hadley WoodHadley Wood More articles by this author , and Kenneth AngermeierKenneth Angermeier More articles by this author View All Author Informationhttps://doi.org/10.1097/JU.0000000000002561.06AboutPDF ToolsAdd to favoritesDownload CitationsTrack CitationsPermissionsReprints ShareFacebookLinked InTwitterEmail Abstract INTRODUCTION AND OBJECTIVE: While utilization of artificial urinary sphincter (AUS) for post prostate cancer intervention incontinence can improve quality of life, AUS placement in men with prostate cancer (CaP) progression to biochemical recurrence (BR) or distant metastatic disease (DM) with respect to AUS outcomes has yet to be characterized. METHODS: Retrospective review of patients who underwent AUS implantation from 1/2009-8/2021 was performed. Demographics, comorbidities, CaP treatment, pathology, progression, timing of AUS following primary intervention, surgical characteristics, incontinence outcomes and device revisions were assessed by chi-square and Pearson’s t-test analyses. Multivariable Cox proportional hazards and Kaplan Meier models were used to assess time to AUS device revision by CaP progression. RESULTS: We identified 526 patients who underwent AUS implantation, 255 had complete CaP and AUS characteristics as summarized in the table. Mean follow up from AUS and primary CaP treatment was 56 and 118 months, respectively. Among 134 patients treated with radiation, 40 developed AUS complications with 11 erosions and 11 with recurrent incontinence (p=0.21). In 78 patients treated with androgen deprivation therapy (ADT), AUS complications were noted in 22 with 7 erosions and 6 with recurrent incontinence, prompting revision (p=0.77). BR occurred in 101 patients (40%), with 16% requiring AUS revision (p=0.92). DM developed in 28 patients (11%), with 8 undergoing AUS after DM diagnosis. On univariate analysis, only transcorporal cuff use [HR 3.6 (95% CI 1.7-7.3), p=0.001] significantly correlated with AUS revision.There was no significant difference in continence rates following AUS for patients who underwent prostatectomy, radiation therapy, ADT, or who developed BR or DM. A majority (76%) reported 0-1 pads/day at last follow up. AUS durability for those with BR, by 2 years was 92%, 5 years 85%, and by 10 years 60% (p=0.55). In DM, this was 96% by 2 years, 90% by 5 years, and 71% by 10 years (p=0.26). CONCLUSIONS: There were no significant differences in AUS outcomes between patients without CaP disease progression and those with BR, local recurrence, or DM. Based on this data, AUS implantation in patients undergoing salvage or adjuvant therapy may still be an effective procedure. Source of Funding: None © 2022 by American Urological Association Education and Research, Inc.FiguresReferencesRelatedDetails Volume 207Issue Supplement 5May 2022Page: e373 Advertisement Copyright & Permissions© 2022 by American Urological Association Education and Research, Inc.MetricsAuthor Information Shree Agrawal More articles by this author Hanson Zhao More articles by this author Joao Pedro Emrich Accioly More articles by this author Hadley Wood More articles by this author Kenneth Angermeier More articles by this author Expand All Advertisement PDF DownloadLoading ...

Diagnostic features of lumbar canal osteochondroma and review of literature

Osteochondroma is a common benign primary bone tumor that can be multiple or solitary and is usually caused by a developmental defect in the growth plate. Osteochondroma usually arises from an osteochondroma near the ends of long bones and is less likely to occur in the spine. Data show that the incidence of single spinal osteochondroma is only 1.3%-4%, and the most common sites are cervical vertebra, thoracic vertebra, thoracolumbar and lumbar vertebra. Osteochondroma of the lumbar spine is rare because its ossification center generally ossified around 30 years of age, later than cervical and thoracic vertebrae. Only about 30% of patients with osteochondroma of the lumbar spine had intact cartilage caps. If the thickness of the cartilage cap is assessed, it is difficult to see on conventional radiographs. Conventional radiographic assessment is usually used to diagnose osteochondroma in the extremities, whereas radiographic diagnosis of osteochondroma in the spine is more difficult. This case was reported as a female patient with a single osteochondroma, which occurred in the lumbar spine and had a complete cartilage cap during the operation. This case is rare, which can provide some help for clinical practice to avoid misdiagnosis and missed treatment of this kind of disease.

Parsec-scale Properties of Steep- and Flat-spectrum Extragalactic Radio Sources from a VLBA Survey of a Complete North Polar Cap Sample

Abstract We observed with the Very Long Baseline Array (VLBA) at 2.3 and 8.6 GHz a complete flux-density-limited sample of 482 radio sources with decl. > +75° brighter than 200 mJy at 1.4 GHz drawn from the NVSS catalog. A total of 34% of the sources show parsec-scale emission above the flux density detection limit of 30 mJy; their accurate positions and parsec-scale structure parameters are determined. Among all the sources detected at least at the shortest VLBA baselines, the majority, or 72%, have a steep single-dish spectrum. The fraction of the sources with a detectable parsec-scale structure is above 95% among the flat-spectrum objects and close to 25% among the steep-spectrum objects. We identified 82 compact steep-spectrum source candidates, which make up 17% of the sample; most of them are reported for the first time. The compactness and the brightness temperature of the sources in our sample show a positive correlation with single-dish and VLBA spectral indices. All the sources with a significant 8 GHz variability were detected by the VLBA snapshot observations, which independently confirmed their compactness. We demonstrated that 54% of the sources detected by the VLBA at 2.3 GHz in our sample have a steep VLBA spectrum. The compact radio emission of these sources is likely dominated by optically thin jets or mini-lobes, not by an opaque jet core. These results show that future VLBI surveys aimed at searching for new sources with parsec-scale structure should include not only flat-spectrum sources but also steep-spectrum ones in order to reach an acceptable level of completeness.

Genetic diversity of Indian porcine circovirus type 2 (PCV2) isolates (2006-2018)

Porcine circovirus type 2 (PCV2) is an emerging viral infection in swine population and results in severe economic loss to piggeries worldwide. The present study was conducted to explore the genetic diversity of PCV2 circulating in swine population of India from 2006–2018. A total of 74 heart, lungs, spleen and lymph nodes collected from different regions in Uttar Pradesh, India were subjected to molecular analysis. For studying genetic diversity, the complete nucleotide and ORF2 sequences of 95 PCV2 including 43 nucleotide sequences from India were used. DNA was extracted from samples and positive samples were subjected to full genome sequencing and phylogenetic analysis was done by maximum likelihood method. Phylogenetic analysis of 40 Indian PCV2 genomes downloaded from GenBank along with three new isolates from the current study based on the complete genome and cap gene together with nucleotide sequences of PCV2 isolates from different countries results in a tree in which Indian isolates clustered in 4 different branches includes PCV2b-1C, PCV2a-2D, PCV 2b-1A/B, PCV 2d-2 recombinant group and two new cluster in which one clustered along with unclassified PCV2 viruses from Indonesia and Croatia. The comparison of ORF2 gene among Indian isolates revealed nucleotide identity ranging from 88.6% to 99.6%, indicating the genetic diversity of PCV2 strains circulating in Indian pig. The present work reports for the first time in India the PCV2-1A/B cluster of 2b genotype and all the Indian isolates available in India from 2006–2018 were used in this analysis.

Genetic Characterization of Porcine Circovirus 3 Strains Circulating in Sardinian Pigs and Wild Boars.

Porcine circovirus 3 (PCV3) is a recently discovered member of the Circoviridae family. So far, its presence has been reported in North America, Asia, South America, and Europe. In this study, blood and tissue samples from 189 Sardinian suids (34 domestic pigs, 115 feral free ranging pigs, and 39 wild boars) were used to genetically characterize the PCV3 strains from Sardinia. PCV3 infection in the animals was confirmed by real time PCR. The detection rate in the three groups analyzed was l7.64% in domestic pigs, 77.39% in free ranging pigs, and 61.54% in wild boars. Moreover, our results showed that co-infection of PCV3 with other viruses is quite a common occurrence. Molecular characterization of Sardinian PCV3 strains was performed by sequencing 6 complete genomes and 12 complete cap genes. Our results revealed that there is a high similarity between our strains and those identified in different countries, confirming the genetic stability of PCV3 regardless of geographical origin. Haplotype network analysis revealed the presence of 6 whole genomes or 12 unique ORF2 haplotypes and a nonsynonymous mutation in ORF2 that leads to an R14K amino acid substitution. Phylogenetic analysis of whole genome and ORF2 was also conducted. The Sardinian strains were allocated in three different clusters of phylogenetic trees of both complete genome and ORF2. With this study, we have provided a snapshot of PCV3 circulation in Sardinia. Our findings might help to achieve a deeper understanding of this emerging porcine virus.

Molecular epidemiology and genetic variation analyses of porcine circovirus type 2 isolated from Yunnan Province in China from 2016-2019

BackgroundPorcine circovirus type 2 (PCV2) is the causative agent of porcine circovirus-associated disease (PCVAD). Its prevalence in swine herds was first reported in China in 2000. PCV2 infection causes immunosuppression that leads to multiple diseases, causing serious economic problems for the swine industry in China. Since information on the genetic variation of PCV2 in Yunnan province is limited, this study aims to investigate the molecular epidemiological and evolutionary characteristics of PCV2 from 2016 to 2019.MethodsA total of 279 clinical samples were collected from different regions of Yunnan between 2016 to 2019, and PCV2 was detected by PCR. We then amplified full genomes from the positive samples, and the sequences were analysed for homology and genetic evolution.ResultsOverall, 60.93% (170/279) of the screened swine herd samples were positive for PCV2. We sequenced 15 Yunnan province PCV2 strains from positive samples. Analyses of the complete genomes and Cap genes led to the classification of the 15 Yunnan PCV2 strains into PCV2a (2 of 15), PCV2b (1of 15) and PCV2d (12 of 15). All strains shared 94.3–99.9% of their identities with the nucleotide sequences of complete genomes in this study and shared 94.2–99.9% identity with the reference sequences. All strains share 89.4–100% and 86.8–100% of their identities with the nucleotide and amino acid (aa) sequences of Cap, respectively.ConclusionsThe results of this study provide evidence that PCV2a, PCV2b and PCV2d genotypes coexisted in Yunnan Province from 2016 to 2019, and the priority prevalence genotype was PCV2d. The data provide evidence for the increased genetic diversity and insights into the molecular epidemiology of PCV2. This study also provides basic data for the Yunnan province PCV2 molecular epidemiological survey and accumulates effective materials for the development of PCV2 vaccines.

On Almost Complete Caps in PG(N, q)

Abstract We propose the concepts of almost complete subset of an elliptic quadric in the projective space PG(3, q) and of almost complete cap in the space PG(N, q), N ≥ 3, as generalizations of the concepts of almost complete subset of a conic and of almost complete arc in PG(2, q). Upper bounds of the smallest size of the introduced geometrical objects are obtained by probabilistic and algorithmic methods.

Expansion of cap superfamily proteins in the genome of Mesocestoides corti: An extreme case of a general bilaterian trend

The CAP superfamily is a diverse group of proteins that are involved in different biological processes, yet their molecular functions are still incompletely understood. The α-β-α sandwich structure of the CAP domain is characteristic of this superfamily and several different domains may be found together with it. They are generally secreted proteins and in helminths many are secreted to the environment, and are related to the host-parasite interaction. In this work we mined cestode genomic data for members of this superfamily. Whereas in average 26 members with complete CAP domains were found in most cestodes, in Mesocestoides corti we strikingly found 271 members with complete domains, most of which show evidence of expression. We also found other truncated domains and putative pseudogenes. Interestingly, most of these genes were found in a monophyletic clade within a cestode-specific group of CAP domain containing proteins, and each cestode species has also developed independent duplications of these proteins. This pattern of extensive independent duplications can also be found in other parasitic and free-living flatworms, as well as in other metazoan phyla. Within the M. corti specific expansion, several sub-clades of these proteins showed evidence of evolution under positive selection. Our results suggest that the CAP domain containing proteins of animals evolve through a “birth and death” mechanism, and that different environmental pressures may drive this evolution in different species. In the case of helminth parasites, this could be related to the interaction between the parasite and the host, including mechanisms to evade and modulate the host immune system.

Molecular characterization of pigeon torque teno virus (PTTV) in Jiangsu province

The torque teno virus (TTV) is a recently discovered DNA virus that has been detected in many different hosts, including humans, livestock and poultry. To date, there is no report of pigeon TTV (PTTV) from anywhere in the world. To investigate the distribution of PTTV in pigeons from the eastern Chinese province of Jiangsu and characterize their genomes, we employed PCR to detect PTTV in 144 samples collected from 6 pigeon plants in Jiangsu province, amplify complete genomes from representative samples and analyze genetic characteristics using bioinformatics. The results demonstrated that 71.5% (103/144) of samples were PTTV positive. The rate of sequence homology among the six PTTV complete genomes obtained from Jiangsu province ranged from 99.7% to 100%. Phylogenetic analysis suggested that PTTV genomes had a high degree of genetic similarity and were similar to chicken anemia virus that also had poultry as a host. Although with the same host, PTTV shared distant relationship with PiCV in both complete genome, Rep and Cap genes. The results of this study provided evidence that PTTV could be detected in Chinese pigeons at a high level, the evolutionary process of complete genome, Rep and Cap genes of Anelloviridae family had obvious divergence.

Mycophagous rove beetles highlight diverse mushrooms in the Cretaceous

Agaricomycetes, or mushrooms, are familiar, conspicuous and morphologically diverse Fungi. Most Agaricomycete fruiting bodies are ephemeral, and their fossil record is limited. Here we report diverse gilled mushrooms (Agaricales) and mycophagous rove beetles (Staphylinidae) from mid-Cretaceous Burmese amber, the latter belonging to Oxyporinae, modern members of which exhibit an obligate association with soft-textured mushrooms. The discovery of four mushroom forms, most with a complete intact cap containing distinct gills and a stalk, suggests evolutionary stasis of body form for ∼99 Myr and highlights the palaeodiversity of Agaricomycetes. The mouthparts of early oxyporines, including enlarged mandibles and greatly enlarged apical labial palpomeres with dense specialized sensory organs, match those of modern taxa and suggest that they had a mushroom feeding biology. Diverse and morphologically specialized oxyporines from the Early Cretaceous suggests the existence of diverse Agaricomycetes and a specialized trophic interaction and ecological community structure by this early date.

Upper bounds on the smallest size of a complete cap in PG(3,q) and PG(4,q)

In this work we summarize some recent results to be included in a forthcoming paper [Bartoli, D., A. A. Davydov, A. A. Kreshchuk, S. Marcugini and F. Pambianco, Small complete caps in PG(3,q) and PG(4,q), preprint]. We present and analyze computational results concerning small complete caps in the projective spaces PG(N,q) of dimension N=3 and N=4 over the finite field of order q. The results have been obtained using randomized greedy algorithms and the algorithm with fixed order of points (FOP). The new complete caps are the smallest known. Based on them, we obtained new upper bounds on the minimum size t2(N,q) of a complete cap in PG(N,q), N=3,4. Our investigations and results allow to conjecture that these bounds hold for all q.

Conjectural upper bounds on the smallest size of a complete cap in PG(N,q), N ≥ 3

In this work we summarize some recent results to be included in a forthcoming paper [Bartoli, D., A. A. Davydov, G. Faina, S. Marcugini and F. Pambianco, Upper bounds on the smallest size of a complete cap in PG(N,q) under a certain probabilistic conjecture, preprint]. In the projective space PG(N,q) over the Galois field of order q, N≥3, an iterative step-by-step construction of complete caps by adding a new point at every step is considered. It is proved that uncovered points are evenly placed in the space. A natural conjecture on an estimate of the number of new covered points at every step is done. For a part of the iterative process, this estimate is proved rigorously. Under the mentioned conjecture, new upper bounds on the smallest size t2(N,q) of a complete cap in PG(N,q) are obtained. In particular,t2(N,q)<1q−1qN+1(N+1)ln⁡q+1q−3qN+1∼qN−12(N+1)ln⁡q. The effectiveness of the bounds is illustrated by comparison with complete caps sizes obtained by computer searches. The reasonableness of the conjecture is discussed.

Maximum Scattered Linear Sets and Complete Caps in Galois Spaces

Explicit constructions of inFInite families of scattered Fq-linear sets in PG(r-1, qt) of maximal rank rt/2, for t ≥ 4 even, are provided. When q = 2, these linear sets correspond to complete caps in AG(r,2t) FIxed by a translation group of size 2rt/2. The doubling construction applied to such caps gives complete caps in AG(r+1, 2t) of size 2rt/2+1. For Galois spaces of even dimension greater than 2 and even square order, this solves the long-standing problem of establishing whether the theoretical lower bound for the size of a complete cap is substantially sharp.

Absolute kinematics of radio-source components in the complete S5 polar cap sample

We have carried out a high-precision astrometric analysis of two very-long-baseline-interferometry (VLBI) epochs of observation of the 13 extragalactic radio sources in the complete S5 polar cap sample. The VLBI epochs span a time baseline of ten years and enable us to achieve precisions in the proper motions of the source cores up to a few micro-arcseconds per year. The observations were performed at 14.4 GHz and 43.1 GHz, and enable us to estimate the frequency core-shifts in a subset of sources, for which the spectral-index distributions can be computed. We study the source-position stability by analysing the changes in the relative positions of fiducial source points (the jet cores) over a decade. We find motions of 0.1−0.9 mas among close-by sources between the two epochs, which imply drifts in the jet cores of approximately a few tens of μas per year. These results have implications for the standard Active Galactic Nucleus (AGN) jet model (where the core locations are supposed to be stable in time). For one of our sources, 0615+820, the morphological and spectral properties in year 2010, as well as the relative astrometry between years 2000 and 2010, suggest the possibility of either a strong parsec-scale interaction of the AGN jet with the ISM, a gravitational lens with ~1 mas diameter, or a resolved massive binary black hole.

3D spherical-cap fitting procedure for (truncated) sessile nano- and micro-droplets & -bubbles.

In the study of nanobubbles, nanodroplets or nanolenses immobilised on a substrate, a cross-section of a spherical cap is widely applied to extract geometrical information from atomic force microscopy (AFM) topographic images. In this paper, we have developed a comprehensive 3D spherical-cap fitting procedure (3D-SCFP) to extract morphologic characteristics of complete or truncated spherical caps from AFM images. Our procedure integrates several advanced digital image analysis techniques to construct a 3D spherical-cap model, from which the geometrical parameters of the nanostructures are extracted automatically by a simple algorithm. The procedure takes into account all valid data points in the construction of the 3D spherical-cap model to achieve high fidelity in morphology analysis. We compare our 3D fitting procedure with the commonly used 2D cross-sectional profile fitting method to determine the contact angle of a complete spherical cap and a truncated spherical cap. The results from 3D-SCFP are consistent and accurate, while 2D fitting is unavoidably arbitrary in the selection of the cross-section and has a much lower number of data points on which the fitting can be based, which in addition is biased to the top of the spherical cap. We expect that the developed 3D spherical-cap fitting procedure will find many applications in imaging analysis.

The Pharmaceutical Capping Process-Correlation between Residual Seal Force, Torque Moment, and Flip-off Removal Force.

The majority of parenteral drug products are manufactured in a glass vials with an elastomeric rubber stopper and a crimp cap. The vial sealing process is a critical process step during fill-and-finish operations, as it defines the seal quality of the final product. An adequate force to remove the flip-off button prior to usage is required to ensure product quality during storage and transportation until use. In addition, the complete crimp cap needs to be fixed in a tight position on the vial. In this study, we investigated the torque moment required to turn the crimp cap and the force required to remove the flip-off button of container closure system sealed with different capping equipment process parameters (having different residual seal force values).

A new duck circovirus sequence, detected in velvet scoter (Melanitta fusca) supports great diversity among this species of virus.

BackgroundThe aim of this study was to investigate the presence of circoviruses in wild bird populations, in Poland. Circoviruses possess immuno-suppressive properties and might interfere with the health of wild birds.Method83 birds, which belonged to 23 species, were tested with broad-range, nested PCR. The obtained PCR products were sequenced and new primers designed, to analyse the full-length, viral genome. A phylogenetic analysis was conducted, to find any relationship to known circoviruses.ResultsThe circovirus DNA sequence was found in 4 birds. All samples originated from the velvet scoter (Melanitta fusca) a marine duck from the Merginae sub-family. Birds which tested positive for the circovirus were found dead in fishing nets, off the Baltic coast. During post-mortem examination, carcasses of two of the scoters showed only light emaciation, while the two other birds appeared healthy. The obtained, full-length, circovirus sequence revealed 1,988 nucleotides and the presence of typical features (i.e. Cap, Rep and ORF3). Nucleotide similarity to other duck circoviruses was 84 to 86 %. Phylogenetic analysis of the complete genome and cap gene, indicated that the new circovirus is related to known duck circoviruses, especially to sub-types sometimes referred to as duck circovirus genotype 1, but not genotype 2.ConclusionsIn this study, we have reported a new duck circovirus sequence detected in the velvet scoter, a species of marine duck. Sequence comparison and phylogenetic analysis of the new virus sequence support previous reports that duck circovirus (DuCV) is a species with a high degree of diversity. The viral sequence obtained from the velvet scoter suggests that DuCV may infect birds from the Anatinae sub-family. More studies are needed to prove if the velvet scoter and other marine ducks act as a reservoir for DuCV.

Sex differences in immunohistochemical expression and capillary density in pancreatic solid pseudopapillary neoplasm.

Solid pseudopapillary neoplasm (SPN) is a rare and low-grade malignant pancreatic neoplasm. Solid pseudopapillary neoplasm is rare in men, and most SPN cases are in young women. This study aimed to investigate sex differences in SPN clinical histopathology including capillary density and expression of immunochemical markers, including glypican 3. A total of 22 resected tumors from pancreatic SPN patients, including 16 women (73%) and 6 men (27%), were analyzed histopathologically and immunohistochemically for synaptophysin, β-catenin, estrogen receptor, progesterone receptor, Ki-67, CD10, CD31, and glypican 3. The median age was 52.5 years in men and 24 years in women (P = .046). The median tumor size was 22.5 mm in men and 40 mm in women (P = .337). In 11 of the 16 women (69%), but in none of the men, tumors showed complete or incomplete fibrous cap`sules (P = .006). Cholesterol clefts were observed in tumors from 10 women (63%) but in none from the men (P = .012). No significant sex differences were noted in tumor characteristics, including size, macroscopic cystic degeneration, necrosis, lymphovascular involvement, and perineural invasion. The SPNs were weakly positive for glypican 3, although there was no significant difference between sexes. Capillary density tended to be lower in tumors from men than in those from women, but not significantly. Thus, except for the fibrous capsule and cholesterol clefts often found in tumors and the younger age of the women, there were no significant sex differences in histopathologic or immunohistochemical features of SPN, despite its markedly higher occurrence in women.