Search PubMed⌕ Search

SEARCH · Search PubMed

Results for “PENIS”

Search indexed PubMed citations on genomics, clinical trials, systematic reviews and public health. Explore titles, authors and supplied subject terms, then open the PubMed record.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

At least 109 records · Page 6Linked to original sources

Subcutaneous granuloma annulare of the penis in 2 adolescents.

Granuloma annulare (GA) is a benign inflammatory disorder of unknown etiology characterized histologically by dermal palisading granulomas with central degeneration of collagen (necrobiosis). There is a rare subcutaneous clinical variant, this occurring more frequently in children than in adults and very rarely involves the penis. We describe 2 cases of penile subcutaneous GA developing in adolescent boys who to our knowledge has not previously been described in literature. Both were initially treated with surgical excision. Circumcision was performed on one of the boys, with subsequent improvement with the resolution of most of the nodules. Granuloma annulare of the penis is very rare, with only 7 cases reported to date [Narouz N, Allan PS, Wade AH. Penile granuloma annulare. Sex Transm Infect 1999;75(3):186-7; Trap R, Wiebe B. Granuloma annulare localised to the shaft of the penis. Scand J Urol Nephrol 1993;27(4):549-51; Laird SM. Granuloma annulare of the penis. Genitourin Med 1992;68(4):277; Hillman RJ, Waldron S, Walker MM, et al. Granuloma annulare of the penis. Genitourin Med 1992;68(1):47-9; Kossard S, Collins AG, Wegman A, et al. Necrobiotic granulomas localised to the penis: a possible variant of subcutaneous granuloma annulare. J Cutan Pathol 1990;17(2):101-4] and no previous reports in children or adolescents to our knowledge. All except one of the cases reported so far were of the subcutaneous (nodular) form of GA.

Adolescent↗

The endothelin ET(B) receptor agonist [125I]BQ-3020 binds predominantly to nerves in the bovine retractor penis muscle and penile artery.

Preliminary pharmacological experiments have suggested that in the bovine retractor penis muscle there are relaxation-mediating endothelin ET(B) receptors, at least part of which are located on the inhibitory nitrergic nerves. The present work was undertaken to test this hypothesis by means of receptor autoradiography and additional pharmacological experiments. In the retractor penis muscle and the penile artery, specific binding of the ETB receptor-selective agonist [125I]BQ-3020 took place predominantly to nerve trunks and minor nerve branches. The situation was the same in the dorsal metatarsal artery, that was included as a reference because of its different innervation. Throughout the nerves the silver grains were evenly distributed over the nuclei of Schwann cells and the spaces between them. In the retractor penis there was also a small amount of specific binding to smooth muscle. No specific endothelial binding was observed in any of the tissues examined. The pharmacological studies confirmed that the relaxation of the retractor penis muscle induced by the ET(B) receptor-selective agonist, sarafotoxin S6c, is susceptible to tetrodotoxin as well as to inhibition of nitric oxide synthase. The relaxation was also characterized by inconsistency, weakness and tachyphylaxis. The electrical field stimulation-induced submaximal relaxation of the retractor penis was unaffected by stimulation or blockade of ET(B) receptors. The autoradiography suggests that in all the three bovine tissues studied there are ET(B) receptors located on nerves independently of the type of efferent nerve. The pharmacological experiments do not support the concept that in the bovine retractor penis muscle neuronal ET(B) receptors exert important immediate effects on the functioning of the penile erection-mediating nitrergic nerves.

Animals↗

Multiple vasodilator pathways from the pelvic plexus to the penis of the rat.

The main penile or cavernous nerve is usually regarded as the most important vasodilator projection in the rat. Although other descending pathways have been described, there is little detailed information on their importance. In this present report, we provide topographic and quantitative information on lateral and ventral penile branches and examine the vasodilator fibers which join the pudendal neurovascular bundle. Seventeen Sprague-Dawley rats were used. The techniques included injection of dye in the penis to label neurons in the pelvic plexus in combination with transection of the main penile nerve (MPN). NADPH diaphorase (NADPH-d) histochemistry was used to assess the effects of transection of vasodilator pathways on innervation of the penis and for in situ staining of the pelvic plexus. Distinct clusters of penile neurons are aggregated at the origin of several nerve tracts leaving the posterior margin of the major pelvic ganglion (MPG). Multiple NADPH-d+ fiber bundles coursed over the anterior surface of the prostate to reach the penis. Branches from these tracts joined the pudendal neurovascular bundle proximal to the hilum of the penis and provided innervation to the artery throughout its course in the pudendal canal. Consistent with the presence of multiple penile pathways, transection of the MPN reduced, but did not eliminate retrograde labeling of penile neurons in the MPG and only modestly decreased NADPH-d+ fibers in the penis. This study confirms that there are multiple pathways by which vasodilator fibers reach the penis. If a similar allocation of vasodilator output is present in man, preservation of finer branches of the pelvic plexus would be important in surgical procedures on the prostate.

Animals↗

Arterial supply of the penis in the New Zealand rabbit (Oryctolagus cuniculus L.).

In the present study, the distributional pattern of the penile artery and the vessels joining the blood supply of the penis were investigated in the New Zealand rabbit. Eight adult rabbits were used in the study. In order to exhibit the vascular network by dissection, latex was injected via the abdominal aorta. The main vessel which supplies blood to the penis, the penile artery, is a branch of the internal pudendal artery. It divides into two branches which form the deep and dorsal penile arteries at the level of the ischiadic arch. The deep penile artery penetrates the tunica albuginea, and forms the arterial network of corpus cavernosum penis. On the other hand, the dorsal penile artery gives off three small branches for the subischiocavernosus muscle and at the level of the attachment of this muscle sends two small branches for the preputium. The course of both arteries follows the dorsolateral surface of the penis to the glans and ends in an anastomosis. Hence, a caudal branch of the prostatic artery which originates from the umbilical artery joins the blood supply of the penis in the rabbit. After vascularizing the prostate complex, it ends by entering the corpus spongiosus penis at the dorsolateral surface at the level of the ischiadic arch.

Animals↗

Correction of congenital chordee penis by 'ventral separation and outward rotation of corpora'.

BACKGROUND/PURPOSE: The formation of congenital chordee penis in patients with or without hypospadias is multifactorial and not completely clear. In most cases, after release of all known causes of chordee, "residual" penile curvature can persist. The authors discuss the etiopathogenetic mechanisms of congenital chordee penis and describe their experience in surgical correction of "residual" penile curvature by "ventral separation and outward rotation of corpora." METHODS: In 22 patients with congenital chordee penis with or without hypospadias, "residual" penile curvature was corrected by "ventral separation and outward rotation of corpora." RESULTS: Ventral separation and outward rotation of corpora resulted in satisfactory correction of penile curvature. In only 2 cases of chordee penis without hypospadias was further intervention necessary: a Nesbit's plication was carried out in one and a neourethra placed in the other. At follow-up no residual penile curvature was observed. CONCLUSIONS: An arrest of development of the penis caused by failure of outward ventral rotation of the corpora, may contribute to the formation of chordee penis. When "residual" penile curvature persists, "ventral separation and outward rotation of corpora" can be used to correct this complex malformation.

Child↗

Cross-cultural perspectives on penis envy.

From the outset, Freud's notion of penis envy stirred controversy within and outside the psychoanalytic movement (Fliegel 1973; Moulton 1975). charges leveled at the theory ranged from biological improbability to lack of clinical support, but the most compelling challenge has always been Clara Thompson's formulation that what women really envy is not male anatomy but male status and power, for which the penis is a convenient symbol (1941, 1942, 1943, 1950). But despite the inherent plausibility of Thompson's argument, empirical evidence has never been adduced to confirm it. This paper reports a cross-cultural investigation that lends support to Thompson's view. In this study, the extent of penis envy imagery in the dreams of women from 20 cultures was correlated with a measure of female status in those cultures; an inverse relationship was found demonstrating that the higher social position of these women, the less they manifested penis envy fantasies in their dreams. For the men from these cultures, penis envy fantasies varied not with the status of women but with the visibility of sex differences, suggesting that penis envy may have a different and more literal meaning for men than for women. The clinical and social implications of these findings are discussed.

Cross-Cultural Comparison↗

Hidden penis release: adjunctive suprapubic lipectomy.

We believe the hidden penis may be caused and concealed by a prominent suprapubic fat pad in addition to the restrictive fibrous bands of the dartos fascia fixing the shaft of the penis proximally while loose skin folds prolapse distally over the phallus. A penis of inadequate length or appearance may affect body image. Patients with this problem often require psychological support. Hidden penis may be distinguished from micropenis by palpating adequate corpora and showing a stretched penile length within 2 SD of normal. Excision of suprapubic fat with sectioning of the tethering dartos bands will release and increase the length of the penis. Suprapubic fat pad resection may also be helpful to elongate a short penis in cases of adult microphallus, or after partial penectomy because of trauma or cancer. Circumcision is contraindicated.

Adipose Tissue↗

Buried penis: congenital syndrome of a short penile shaft and a paucity of penile shaft skin.

PURPOSE: The term "buried penis" has been applied to a variety of penile abnormalities and includes an apparent buried penis that is obvious at birth. The purpose of this study was to examine prospectively the congenital buried penis and to evaluate an operative technique for its management. MATERIALS AND METHODS: A total of 31 males 2 to 28 months old (mean age 12.3 months) with a congenital buried penis underwent surgical correction of the anomaly. Measurements were made of the penile shaft skin, inner leaf of the prepuce, glans length and stretched penile length. Observations of the subcutaneous tissue of the penis were made. The outer leaf of the prepuce was resected, following which covering of the penile shaft was accomplished with a combination of the penile shaft skin and the inner leaf of the prepuce. RESULTS: Stretched penile lengths ranged from 2.3 to 4.1 cm (mean 3.1). The glans length from the tip of the glans dorsally to the corona ranged from 0.9 to 1.6 cm (mean 1.2). The inner leaf of the prepuce ranged from 0.9 to 2.2 cm (mean 1.5) in length, while the dorsal penile skin lengths were 1 to 1.6 cm (mean 0.8). In all patients complete shaft coverage was accomplished using a combination of varying degrees of penile shaft skin and inner leaf of the prepuce. In no case was there a requirement for either unfurling of the inner and outer leaf of the prepuce or mobilization of scrotal flaps to accomplish shaft coverage. All patients healed well and have done well with a followup of 6 months to 1 year. CONCLUSIONS: Congenital buried penis is a syndrome consisting of a paucity of penile shaft skin and a short penile shaft. The anomaly may be successfully repaired by carefully preserving a length of inner leaf of the prepuce sufficient to cover, in some instances, the length of the penile shaft. Anchoring of the penile skin to the shaft is not recommended.

Child, Preschool↗

Surgical correction of buried penis after traffic accident - a case report.

BACKGROUND: Buried penis, most commonly seen in children, is particularly debilitating in adults, resulting in inability to void while standing and it also affects vaginal penetration. We report a case of buried penis due to a traffic accident, which caused dislocation of the fractured pubic bone that shifted inside and pulled the penis by its suspensory ligament. CASE PRESENTATION: A 55-year-old man was admitted to our hospital with a chief complaint of hidden penis while in the sitting position. He had suffered a pelvic fracture in a traffic accident four years previously, and his penis was covered with suprapubic fat when he was in a sitting position. He was unable to have sexual intercourse. We performed a penile lengthening procedure, including inverse V-Y-plasty of the dorsal skin of the penile root, suspensory desmotomy and fat removal, under general anesthesia. There was a good cosmetic result with satisfactory penile erection, which allowed successful sexual intercourse after surgery. CONCLUSION: We performed penile elongation surgery with inverse V-Y-plasty of the dorsal skin of the penile root, suspensory desmotomy, and fat removal. Surgical treatment of buried penis achieves marked aesthetic and functional improvement, and benefits the majority of patients, resulting in satisfactory erection and successful sexual intercourse.

Fractures, Bone↗

Experiment of nurture: ablatio penis at 2 months, sex reassignment at 7 months, and a psychosexual follow-up in young adulthood.

Guidelines of psychosexual management for infants born with physical intersex conditions are intended to assist physicians and parents in making decisions about sex of assignment and rearing including the following: 1) sex assignment should be to the gender that carries the best prognosis for good reproductive function, good sexual function, normal-looking external genitalia and physical appearance, and a stable gender identity; 2) the decision regarding sex assignment should be made as early as possible, preferably during the newborn period, with an upper age limit for reversal of an initial sex assignment no later than 18 to 24 months; and 3) there should be minimal uncertainty and ambiguity on the part of parents and professionals regarding the final decision about sex assignment and rearing. J. Money used these guidelines in a case of a biologically normal male infant (one of a pair of monozygotic twins) whose penis was accidentally ablated during a circumcision at the age of 7 months. The decision to reassign the infant boy to the female sex and to rear him as a girl was made at 17 months, with surgical castration and initial genital reconstruction occurring at 21 months. Money reported follow-up data on this child through the age of 9 years. Although the girl was described as having many "tomboyish" behavioral traits, a female gender identity had apparently differentiated. Thus, it was concluded that gender identity is sufficiently incompletely differentiated at birth as to permit successful assignment of a genetic male as a girl, in keeping with the experiences of rearing. Subsequent follow-up by other investigators reported that by early adolescence the patient had rejected the female identity and began to live as a male at the age of 14 years. In adulthood, the patient recalled that he had never felt comfortable as a girl, and his mother reported similar recollections. At age 25, the patient married a woman and adopted her children. The patient reported exclusive sexual attraction to females. The present case report is a long-term psychosexual follow-up on a second case of ablatio penis in a 46 XY male. During an electrocautery circumcision at the age of 2 months, the patient sustained a burn of the skin of the entire penile shaft, and the penis eventually sloughed off. At age 7 months, the remainder of the penis and the testes were removed. By age 7 months, if not earlier, the decision was made to reassign the patient as a female and to raise the infant as a girl. The patient was interviewed on two occasions: at 16 years and twice while in the hospital for additional surgery at 26 years of age. At ages 16 and 26, the patient was living socially as a woman and denied any uncertainty about being a female. During childhood, the patient recalled that she self-identified as a "tomboy" and enjoyed stereotypically masculine toys and games; however, the patient also recalled that her favorite playmates were usually girls and that her best friend was always a girl. When seen at age 16, the patient had been admitted to the hospital for vaginoplasty. At that time, she wished to proceed with the further repair of her genitalia to make them suitable for sexual intercourse with males. At age 26, the patient returned to the hospital for further vaginoplasty. Regarding the patient's sexual orientation, she was attracted predominantly to women in fantasy, but had had sexual experiences with both women and men. At the time of the second surgery, she was in a relationship with a man and wished to be able to have intercourse. The patient's self-described sexual identity was "bisexual." After surgery at age 26 years, the patient developed a rectovaginal fistula. Within a few months of the surgery, the patient and her male partner separated for reasons other than the patient's physical problems. The patient subsequently began living with a new partner, a woman, in a lesbian relationship. The psychosexual development of our patient was bot the other patient was married to a woman. Our patient had a "bisexual" sexual identity; the other patient had a "heterosexual" sexual identity. The patients were similar in that they had a childhood history of "tomboyism." Our patient was predominantly sexually attracted to women; the other patient was exclusively sexually attracted to women. Our patient had sexual experiences with both women and men; the other patient had sexual experiences only with women. The most plausible explanation of our patient's differentiation of a female gender identity is that sex of rearing as a female, beginning at around age 7 months, overrode any putative influences of a normal prenatal masculine sexual biology. Because cases of ablatio penis in infancy are so rare and long-term follow-up data are scant, it is obviously impossible to know whether our patient or the previous case would be more typical of the psychosexual outcome in a larger sample of such individuals. However, our case suggests that it is possible for a female gender identity to differentiate in a biologically "normal" genetic male. At present, however, the clinical literature is deeply divided on the best way to manage cases of traumatic loss of the penis during infancy. Further study is clearly required to decide on the optimal model of psychosocial and psychosexual management for affected individuals.

Amputation, Traumatic↗

[Repair of penile wounds in penis lengthening with the scrotal dartos musculocutaneous flaps].

OBJECTIVE: To provide ideal materials for repair of penile wounds in penis lengthening. METHODS: A skin incision was made between the penis and mons pubis. Penis lengthening was performed by complete releasing of the superficial suspensory ligament and partial releasing of the deep suspensory ligament of the penis. Resurfacing of the defects at the penile base was accomplished by transferring a scrotal dartos musculocutaneous flap pedicled on the anterior scrotal vessels. RESULTS: 16 patients with short penis were treated with the method. All scrotal dartos musculocutaneous flaps survived and 4-4.5 cm extra length of the penile shaft was achieved. Appearance and function of the penis were improved. CONCLUSIONS: The scrotal dartos musculocutaneous flap is one of the best materials to repair the penile skin defects in penile lengthening operation. The advantages of the flap are: 1. good blood supply; 2. thin and lacking of subcutaneous fat; 3. extensibility with the scrotal dartos muscle.

Adolescent↗

Reconstruction of the penis following necrosis from circumcision used high frequency cutting current.

Penis necrosis secondary to circumcision by an electrical scalpel in a 2 years and 2 months-old boy occurred. After healing of the electric burn only stumps of the erectile bodies and strictured urethral meatus remained. The penis shaft reconstruction by corpora mobilisation and by detachment of the crura from the pubo-ischial rami was effected. This procedure gained 6 cm of a new length of the penis. To prevent readhesions to the puboischial rami the penis was buried in a scrotal tunnel. Six months later the denuded shaft was resurfaced with one split thickness skin graft and a zigzag seam on the ventral side was made. The patient voids with good stream, has spontaneous erections and nocturnal emissions. During 10-years follow-up after the reconstruction two complications, namely a stricture of the urethra and a slight dorsal tethering of the penis caused by a scarred pubic skin were treated. The problems of the a reconstruction type and resurfacing of the penis in childhood are discussed.

Child, Preschool↗

Reconstruction of the penis following necrosis from circumcision used high frequency cutting current.

Penis necrosis secondary to circumcision by an electrical scalpel in a 2 years and 2 months-old boy occurred. After healing of the electric burn only stumps of the erectile bodies and strictured urethral meatus remained. The penis shaft reconstruction by corpora mobilisation and by detachment of the crura from the pubo-ischial rami was effected. This procedure gained 6 cm of a new length of the penis. To prevent readhesions to the puboischial rami the penis was buried in a scrotal tunnel. Six months later the denuded shaft was resurfaced with one split thickness skin graft and a zigzag seam on the ventral side was made. The patient voids with good stream, has spontaneous erections and nocturnal emissions. During 10-years follow-up after the reconstruction two complications, namely a stricture of the urethra and a slight dorsal tethering of the penis caused by a scarred pubic skin were treated. The problems of the a reconstruction type and resurfacing of the penis in childhood are discussed.

Circumcision, Male↗

[Penis reconstruction with sensation and erectile function maintained (report of 40 cases)].

OBJECTIVE: To reconstruct a penis with sensation and erectile function maintained by corpora cavernosa lengthening and skin flap transferring in the penis defect cases. METHODS: The procedure was based on the use of releasing the suspensory ligaments and part of crus, various flaps were designed as coverage material. Penis residual stump was advanced to anterior portion of the newly reconstruction penile body as "glans". RESULTS: 40 patients with penis defect have been operated by the above methods. In the cases, length of the penis varied from 0.5-4.0 cm in the flaccid, 1.5-5.0 cm in erect state before operation. And after operation, it turned to 5.0-8.5 cm in the flaccid, 7.0-12.5 cm in erect state. Most of the patients recovered gross tactile sensation and had satisfactory erectile function. CONCLUSION: With this method, the reconstructed penis tends to have a better appearance and function. It's a more optimal method compared with the conventional operation.

Adult↗

[Penile hematoma secondary to rupture of the superficial dorsal vein of the penis].

OBJECTIVES: To report a very unfrequent case of penile hematoma secondary to rupture of the superficial dorsal vein of the penis during intercourse. METHODS: 35-year-old patient presenting at the emergency department with a half moon shape hematoma in the dorsal part of the penis, not much painful, developed when initiating intercourse that we believe was a rupture of the superficial dorsal vein of the penis. RESULTS: In spite of the few cases of rupture of the superficial dorsal vein of the penis described, and after differential diagnosis with other causes of acute penis, conservative attitude with anti-inflammatory drugs and compressive bandage was undertaken. CONCLUSIONS: The rupture of the superficial dorsal vein of the penis is an unfrequent pathology which should be taken into differential diagnosis in a patient consulting with acute penile edema, the attitude is conservative with complete recovery without sequel.

Adult↗

Anatomic considerations of the penis and its lymphatic drainage.

A few clinical caveats relevant to penile neurovascular and lymphatic anatomy deserve special emphasis. First, it is clear from the work of Breza and others that the neurovascular anatomy of the penis differs from patient to patient, especially with regard to the arterial supply. It seems prudent to identify an accessory pudendal artery during pelvic lymphadenectomy and nerve-sparing prostatectomy in order to prevent a neurologically intact penis being left with an inadequate corporal blood supply. From an anatomic perspective, it appears that the sentinel lymph node biopsy might be useful in the management of superficial carcinoma of the prepuce or skin of the penis, as these areas drain to the superomedial zone of the superficial inguinal nodes, to which the sentinel node belongs. However, most tumors of the penis involve the glans. Thus, the sentinel node biopsy will not reliably predict nodal involvement for all clinical stage I lesions, as the lymphatics from the glans may bypass the superficial nodes to invade the pelvic nodes directly. Finally, it remains to be determined what impact, if any, the improved understanding of penile anatomy will have for the patient with carcinoma of the penis. The extent of dissection, both in partial penectomy and in nodal dissection, deserves careful consideration. Armed with a clearer understanding of the anatomy of the penis, the urologist can choose a plan of surgical treatment wisely.

Erectile Dysfunction↗

Development of the os penis in genital tubercles cultured beneath the renal capsule of adult rats.

Genital tubercles of male and female rats were cultured beneath the renal capsule of castrated and intact adult male rats treated with androgens, oestrogen, or anti-androgen, and the development of the os penis in the transplants was studied. When the genital tubercles were cultured in normal male hosts, a membrane bone and a hyaline cartilage of the proximal segment of the os penis were formed 8-11 days after transplantation, and a fibrocartilage of the distal segment of the os penis at 11-14 days. In genital tubercles cultured in castrated males, the rudiments of both the proximal and distal segments remained as undifferentiated mesenchymal cell masses. However, similarly cultured genital tubercles were found to develop cartilages and bone when the hosts were treated with high doses of androgens. The potency of androgen-dependent chondrogenesis and osteogenesis was equivalent in the male and female genital tubercles. Chondrogenesis and osteogenesis of the os penis were caused by androgens, while the rudiments of the os penis were formed independently of androgens. The overt differentiation of the corpus cavernosum penis was also caused by androgens.

Animals↗

[Tuberculosis of the penis: report of a case].

Tuberculosis of the penis has become a rare disease since antituberculosis drugs have come to be widely used. It may be primary or secondary to coexisting tuberculosis elsewhere in the body. In the case of gross destruction of the glans penis and urethra, it is not always easy to differentiate tuberculosis from carcinoma of the penis. A 87-year-old man was admitted with painful ulceration on the glans penis and dysuria. Physical examination strongly suggested carcinoma of the penis other than infectious diseases. In addition, there was no evidence of a tuberculous lesion in other urogenital organs or lungs. Therefore, partial amputation of the penis was performed after admission to the hospital. Histopathological findings, however, revealed typical tuberculosis with Langhans' type of giant cells and no malignancy.

Aged↗