Histochemical analysis, smooth muscle immunolocalization and volumetric density of the elastic system fibres of the ostrich (Struthio camelus) phallus

There are few scientific reports on the histology of the phallus of ratite birds. The aim of this study was to conduct a histochemical analysis to determine the distribution of smooth muscle cells and the volumetric density (Vv) of the fibres of the elastic system in the ostrich phallus. Adult ostriches, 14 months old, were used. The phalluses were fixed in Bouin's solution and then transferred to a buffered formalin solution. They were then processed using standard histological stains for paraffin and slices were obtained. The following techniques were performed: HE, Picrosirius red, Alcian Blue at pH 1.0 and 2.5. The Periodic acid-Schiff reagent and Weigert's Resorcin-Fuchsin with previous oxidation were performed. The M42 test system was used to quantify the elastic system fibres. For immunohistochemical analysis, an anti alpha smooth muscle actin monoclonal antibody was used. The surface of the phallus is covered by a non-keratinized stratified squamous epithelium, which becomes stratified cylindrical in the region of the spermatic sulcus. No glands associated with the connective tissue were observed. The Vv of the elastic system fibres was 4.75%. Smooth muscle cells were visualized only in the walls of blood vessels through immunostaining, with an absence in the lymphatic sinuses. Despite similarities with other birds, such as the presence of a fibrous external axis, a lymphatic core, and a spermatic groove, the ostrich phallus shows marked differences, including the absence of an elastic core, a non-keratinized lining epithelium, and the absence of glands throughout its extension.

Congenital Pseudodiphallia -A Rare Case Presentation

Diphallia (penile duplication) is a rare congenital malformation with an incidence of about 1 per 5-6 million newborns. The severity of diphallia varies from a small accessory penile-like tissue to complete true penile duplication with other deformities, usually involving the urogenital, gastrointestinal, and musculoskeletal systems. Pseudodiphallia, as a rare kind of diphallia, is characterized by a small accessory penile-like tissue without a normal penile anatomy structure. A 5.5-year-old male child was brought to the pediatric surgery outpatient department by the parents with complaint of difficulty in retracting the prepucial foreskin and the presence of some growth near the glans. There were no other complaints in specific. Clinical examination revealed foreskin retractable with difficulty and small conical lump smaller than the original glans approximately size ~1 cm diameter at the base attached horizontally at the left side of the original glans at the coronal sulcus and visible incomplete clefting in between the 2 glans visible from the aerial view. After approval from anesthetist, the patient was operated under general anesthesia by excision of pseudodiphallia. Urethral catheterization and circumcision of the penis after taking informed parental consent. Postoperatively, the period was uneventful. The patient responded well to the symptomatic treatment and was orally allowed on the same day evening. Urinary catheter was removed on 5th postoperative day. The patient was discharged on oral symptomatic medication and was advice for follow-up.

Partial Amputation of a Nonreducing Prolapsed Phallus in an Ostrich (Struthio camelus)

A 19-year-old male ostrich (Struthio camelus) was referred to a veterinary teaching hospital (São Paulo State University, Botucatu, Brazil) due to a 6-month history of recurrent prolapse of the phallus. On physical examination, 2 ulcerative wounds were present on the phallus, as well as caseous plaques and myiasis. Conservative treatment resulted in improvement but prolapse of the phallus remained. Thus, a decision was made to perform a partial phallectomy. The surgery was successful and no postoperative complications occurred. When the ostrich was reexamined 6 months postsurgery, the ostrich was alert, in good health, and the surgical site completely healed. The owner verbally reported no recurrence of the phallus prolapse 1 year after surgery.

Genital anatomy and copulatory interactions in the broad snouted Caiman (Caiman latirostris)

The broad snouted caiman is a crocodylian native to South America that is subject to extensive conservation management in both wild and farming environments. Although reproductive behaviors like egg laying and clutch care have been examined in this species, little else is known about their copulatory system. We examined the anatomy of male and female cloacal and genital tissues ex vivo to build hypotheses of their interactions during copulation and the effects of that interaction on insemination. Male phallic glans tissues were artificially inflated to expand into their copulatory state, allowing the examination and quantification of structural changes at the gross and tissue levels. Digital reconstruction of MRI stacks yielded three-dimensional tissue compartment specific glans models of the inflated state. Silicone molds of female cloacae and oviducts in conjunction with dissection and diceCT analysis allowed us to assess internal geometry and infer how male and female features interact in copulo. We observed glans expansion within the female proctodeum would result in a copulatory lock limiting deeper intromission or retraction. Intromission and subsequent creation of the copulatory lock produces extensive clitoral compression, providing a possible mechanism for female assessment of male copulatory performance. Further, glans expansion forms a distal lumen that positions the glans tip in or near the vaginal openings. A coiled, muscular vagina provides a possible mechanism for postcopulatory sexual selection by excluding semen. Together, the complex male-female interaction supports evidence for cryptic selection by female choice, which can act as a driver of genital coevolution.

From the Imaginary to Theory of the Gaze in Lacan

To understand Lacan’s thinking process on vision, the entirety of his teaching must be taken into consideration. Until the 60s, the visual field is the imaginary, the constitutive principle of reality in its phenomenal giving to the experience of a subject. This register is the opposite of the field of the word with the L schema and, subsequently, as subordinated to the symbolic system according to the model of the optical schema of the inverted flower vase of Bouasse. It is only with the 1964 seminar that Lacan makes a daring turnaround through which the visual becomes a sign of the emergence of a real that is irreducible to both reality and the mediation of the subject of knowledge. The split that separates reality and the real is reproduced in Lacan within the visual field, which is, on the one hand, the cardinal principle of the consistency of the experience of reality (as imaginary), and on the other, it is an element of irreducibility to reality (as object gaze). This produces a cascade of consequences: first of all, the modification of the presentation of the mirror stage. Unlike the voice, which through prosody, tone, and volume, finds some strips with which anchor itself imaginatively to reality, the gaze, invisible and elusive, escapes the imaginary grasp. Captured in myths, it reveals its power and ability to annihilate—as in the myth of Medusa’s gaze—or to make people fall in love but only with a narcissistic love that leads inexorably to death as in the myth of Narcissus. The gaze is elusive because the subject is dependent on it in the field of desire. Like the voice, it is about the desire on which the subject is supported; it is one of the objects on which the phantom depends. In our opinion, thanks to this characteristic, the gaze object can make remote psychoanalytic treatment possible through easily accessible videoconferencing tools and, at the same time, create new conditions within it that should be carefully evaluated to understand its implications in the session itself.

Hormonal and Molecular Regulation of Phallus Differentiation in a Marsupial Tammar Wallaby

Congenital anomalies in phalluses caused by endocrine disruptors have gained a great deal of attention due to its annual increasing rate in males. However, the endocrine-driven molecular regulatory mechanism of abnormal phallus development is complex and remains largely unknown. Here, we review the direct effect of androgen and oestrogen on molecular regulation in phalluses using the marsupial tammar wallaby, whose phallus differentiation occurs after birth. We summarize and discuss the molecular mechanisms underlying phallus differentiation mediated by sonic hedgehog (SHH) at day 50 pp and phallus elongation mediated by insulin-like growth factor 1 (IGF1) and insulin-like growth factor binding protein 3 (IGFBP3), as well as multiple phallus-regulating genes expressed after day 50 pp. We also identify hormone-responsive long non-coding RNAs (lncRNAs) that are co-expressed with their neighboring coding genes. We show that the activation of SHH and IGF1, mediated by balanced androgen receptor (AR) and estrogen receptor 1 (ESR1) signalling, initiates a complex regulatory network in males to constrain the timing of phallus differentiation and to activate the downstream genes that maintain urethral closure and phallus elongation at later stages.

[Phalus sarcomatoid carcinoma, a case study]

The sarcomatoid carcinoma is a rare histological form, high grade malignancy, aggressive and dark prognosis. We report a (01) case in a young adult of 32 years. The aim of this work is to present, through a review of the literature, the epidemiological and morphological characteristics of this affection; and also to describe the difficulties that the pathologist may encounter in diagnosis of this condition.

Correlation between increased postpubertal phallic growth and the initiation of cranial sexual dimorphisms in male Morelet's crocodile

While puberty is an animal commonality, little is known of its timing or process in crocodylians. Males copulate with an intromittent phallus that has a distinct glans morphology which directly interacts with the female cloaca, putatively effecting effective semen transfer and ultimately increased fecundity. Here we present, during the Morelet's crocodile lifecycle, a well-defined body length (65 cm snout-vent length) inflection point that marks a subsequent increase of phallic glans growth rates. Putatively, this postpubescent growth produces a copulatory-effective phallus. While not as robust of a trend as snout-vent length, this growth inflection concomitantly begins with a body condition index (CI = BM/SVL³ ) between 2.0 and 2.5 and is most distinct above a CI of 2.5. Also, in males, this 65 cm size threshold also aligns with the initiation of more robust growth in caniniform alveoli associated with prominent maxillary and mandibular teeth. This inflection was not observed in females, thus marking a sexual dimorphism that begins to present with the onset of puberty. This bodily manifestation of puberty other than those changes observed in the reproductive tracts is a novel observation for crocodylians and lays a foundation for further study among species of how changing endocrine signaling within sexually maturing males may also influence a broader range of secondary sex characteristics.

Androgen and Oestrogen Affect the Expression of Long Non-Coding RNAs During Phallus Development in a Marsupial

There is increasing evidence that long non-coding RNAs (lncRNAs) are important for normal reproductive development, yet very few lncRNAs have been identified in phalluses so far. Unlike eutherians, phallus development in the marsupial tammar wallaby occurs post-natally, enabling manipulation not possible in eutherians in which differentiation occurs in utero. We treated with sex steroids to determine the effects of androgen and oestrogen on lncRNA expression during phallus development. Hormonal manipulations altered the coding and non-coding gene expression profile of phalluses. We identified several predicted co-regulatory lncRNAs that appear to be co-expressed with the hormone-responsive candidate genes regulating urethral closure and phallus growth, namely IGF1, AR and ESR1. Interestingly, more than 50% of AR-associated coding genes and lncRNAs were also associated with ESR1. In addition, we identified and validated three novel co-regulatory and hormone-responsive lncRNAs: lnc-BMP5, lnc-ZBTB16 and lncRSPO4. Lnc-BMP5 was detected in the urethral epithelium of male phalluses and was downregulated by oestrogen in males. Lnc-ZBTB16 was downregulated by oestrogen treatment in male phalluses at day 50 post-partum (pp). LncRSPO4 was downregulated by adiol treatment in female phalluses but increased in male phalluses after castration. Thus, the expression pattern and hormone responsiveness of these lncRNAs suggests a physiological role in the development of the phallus.

Associated with Phallus Disease in Goose Breeders: Pathological and Bacteriological Findings

In April 2014, poor fertility in a major commercial goose breeder operation in California triggered the submission of six live affected Toulouse ganders ( Anser anser ) to the California Animal Health and Food Safety Laboratory, Turlock branch (University of California-Davis). Toulouse were principally affected among all breeds, and their egg fertility dropped from 65.7% to less than 33.9% in the first 40 days of the 2014 breeding season. The flock consisted of 410 adult birds, 90 males and 320 females, between 2 and 5 yr of age. Inspection of the flock revealed that 44.4% of the Toulouse ganders had severe phallic deformities that prevented them from mating. At postmortem examination, severe yellowish fibrocaseous exudate disrupted the architecture of the phallus and occasionally produced fistulating tracts through the wall of the organ. Microscopically, multifocal lymphoid nodules were noted in the mucosa and submucosa of the phallus and were associated with extensive granulomatous reaction, intralesional bacteria, and spermatozoa. Mycoplasma spp. were isolated from the phallus of affected and nonaffected birds, and PCR protocols targeting the 16S-23S ribosomal RNA intergenic spacer regions and the RNA polymerase beta subunit gene were performed to identify the isolates. Three distinct species were identified on sequencing and analysis using the National Center for Biotechnology Information basic local alignment search tool: Mycoplasma cloacale , Mycoplasma anseris , and an unknown novel Mycoplasma sp. Additionally, Pasteurella multocida , in combination with other bacteria, was also isolated from the phallic lesions and identified as serotype 3 with a DNA profile of 1511 (National Veterinary Service Laboratory). This is the first report of these Mycoplasma spp. and other bacteria associated with reproductive disease in ganders in the United States.

Normal penile, scrotal, and perineal anatomy with reconstructive considerations

A broad overview is provided of the normal anatomy of the male genitalia to offer the best surgical outcomes in cases related to congenital abnormalities, trauma, cancer-related extirpation, and aesthetics. Neural and vascular anatomy is discussed in depth due to its critical role in maintaining function and in assuring tissue viability.

Penile reconstruction

A variety of surgical options exists for penile reconstruction. The key to success of therapy is holistic management of the patient, with attention to the psychological aspects of treatment. In this article, we review reconstructive modalities for various types of penile defects inclusive of partial and total defects as well as the buried penis, and also describe recent basic science advances, which may promise new options for penile reconstruction.