Perineal raphe irritation. Median raphe cysts of the perineum are uncommon congenital lesions of the male genitalia. Perineal raphe irritation

 
 Median raphe cysts of the perineum are uncommon congenital lesions of the male genitaliaPerineal raphe irritation  Treatment is likely to be with chemoradiotherapy

Perineal fistula and other anorectal. a rare congenital abnormality of failure of fusion of the perineal raphe and discussion. this nonepithelized mucous membrane can pose the risk of local irritation and infection, urinary tract infection. The perineal raphe is a visible line or ridge of tissue on the male human body that extends from the anus through theperineum. The 'perineal' raphe exists in both men & women by the ways. 1. This is called ‘idiopathic pruritus ani’ which means ‘itchy anus of unknown cause’. Hold your thumbs in this position for about 1 minute. In most areas of the body, lichen planus causes itchy purple bumps sometimes streaked with white. The most common early complications were skin irritation (12%), pain associated with poor stoma location (7%) and partial necrosis (5%). : Usually nerve irritation. Use a perineal irrigation bottle to help clean or wash away any skin damage or sources of irritation. Raphe means the line of union of the two halves of various symmetrical body parts, and the term median raphe refers to the perineal raphe, which is also known as the median raphe of the perineum. Very easy. Perineal groove is a rare congenital midline malformation of the perineal raphe. , failure of midline fusion of the perineal raphe , lichen sclerosus, accidental trauma , anal fissure, vulvar. 5 month (range, 0. 17. Hunter Handsfield answered. Causes Doctor questions Statistics The perineum pain between the genitals and anus can be commonly caused by anal fissures. Itching in the perineum is the main symptom for hemorrhoids, helminthic invasion or perineal fistula. 1. Another plausible. 1 Normal Scrotal Raphe. Only a few hundred cases have. penis and scrotum. there may be a light burning sensation as it appears, which last a few minutes. The perineal raphe is a visible line or ridge of tissue on the body that extends from the anus through the perineum to scrotum (male) or labia majora (female). Nov 22, 2021 at 1:46 AM. As the patient grows older, the cyst may also progress slowly. Skin sensitivity is tested for touch and pain perception in the perineum, perianal and genital skin. Home;. In winters i had them rarely but now summer is starting & again bumps are appearing on my perineal raphe. Starting stages of fetal development looks same but at 7th week of pregnancy, fetal genital tissues change and form male reproductive organs i. 2. Urinalysis should always be performed, but scrotal imaging is necessary only when the diagnosis remains unclear. Begin by lying on your back — this position makes the contraction easier, according to Harvard Health Publishing. 2 may differ. Simple orchidectomy: Known as a subinguinal orchiectomy, this type of procedure allows the surgeon to access the testicle through a cut in the scrotum. drinking and heart pain jumped 33 percent. A physician will want to do a physical exam and potentially a rectal exam to see what's happening. R10. Nerve irritation. Bulbocavernosus, superficial transverse perineal and external anal sphincter muscles also converge on the central tendon. Other benefits of the procedure include: Improved sexual satisfaction. Treatment can. 1. Perineal groove is a rare congenital midline malformation of the perineal raphe. It is completely common and normal physiological tissue line. It is mostly presented in female infants as an isolated anomaly but can be found in males as well []. Painful urination (pain when you pee). two days later, I mustirbated again and when I came I had tension and. then about a year ago the itch started getting worse, and since then. Raphe means the line of union of the two halves of various symmetrical parts, and the term median raphe refers to the perineal raphe, which is also known as the median raphe of perineum. The raphe, that mysterious “ stitch” running along the bottom of the scrotum, is a remnant of our shared human development in the womb. Treatment is likely to be with chemoradiotherapy. The complete type has the sulcus extended from the posterior fourchette to the. The adductor muscles of the hip originate. I remember mine was always raised, dark, and frankly looked like a large scar. 6. Duct obstruction, entrapment of pudendal nerve, abscess, prostatitis, perineural cyst, ischiorectal abscess, benign prostatic hypertrophy, and prostatitis. How if you experience any of the following symptoms, please contact your clinician: Fever. please do help. Hematoxylin and eosin staining. The female perineum is a diamond-shaped structure inferior to the pelvic diaphragm and between the symphysis pubis and coccyx. Increase in self-esteem. Thus far, there is no reported case of this anomaly in monozygotic twins. A physician will want to do a physical exam and potentially a rectal exam to see what's happening. The bulbospongiosus has no raphe at midterm, despite the perineal raphe that is established. Perineal groove is a sulcus of mucosal tissue with clearly defined margins that can be found in the midline anywhere between the vagina and anus in girls, and rarely. Injuries to the perineum can happen suddenly, known as an acute injury, or gradually, known as a chronic injury. Created for people with ongoing healthcare needs but benefits everyone. Three cases had a redundant long prepuce, and 1 had paraphimosis after preputial retraction, otherwise no other genitourinary anomalies could be detected in those cases. The pathological diagnosis was infantile perianal pyramidal protrusion. However, your body may not let you do so that easily! Many moms experience perineal soreness, pain around the vagina and rectum, after giving birth. Median raphe cysts are a rare, congenital entity. FormalPara Definition . Treatment is likely to be with chemoradiotherapy. Raphe means the line of union of the two halves of various symmetrical body parts, and the term median raphe refers to the perineal raphe, which is also known as the median raphe of the perineum; and it is divided anatomically to: penile raphe, scrotal and perineal raphe (Fig. There may be a relationship to erythromelalgia. 8. Let’s start with the male external genitalia, which includes the membranous - or intermediate - urethra, the. Due to the cessation of random erections, the erectile tissue will atrophy if not regularly put to use, causing the entire penis to shrink over time. Abscesses are pus-filled “cysts”. We perform scrotal surgery, penile procedures, varicocele and hydrocele repair, and circumcision. Its been here since 2-3 years. Case report: cobblestone A 23 year old married man presented to the STD clinic with a complaint of gradual splitting of median raphe. The causes of perineal pain are pretty varied, but they fall into a few different categories. 2. You should drink a lot of water and take a high fiber diet. Methods: We enrolled men with gonococcal infection of the penile raphe and men with urethral. But in 70% of calls to a specialist, the main formulation of the diagnosis with such symptoms is "idiopathic itch of the anus". A vaginal or perineal biopsy is a quick procedure which can be completed on an outpatient basis in our office. The scrotum is a sack of skin divided in two parts by the perineal raphe, which looks like a line down the middle of the scrotum. Minor forms had a splitted or wide scrotal raphe and partial bifid scrotum may be. Abstract. Taint. Keywords: Median raphe cyst, Penis, Scrotum, Perineum, Excision. The incision is extended through the paired retractor penis muscles, the bulbospongiousus muscle, the corpus spongiosum penis, and urethral mucosa overlying the stallion catheter. Most are asymptomatic and are noted incidentally. We report the case of a 4-year-old child presented to the emergency department for a serpiginous and redness lesion extended from the basis of the penis until the perineum. This is common in bike riders, people with chronic constipation, men who work in construction, and patients with a history of pelvic or perineal surgery. I accidentally cut my perineal raphe. It's around 1cm in diameter, was purple (now more pink), and right next to my anus. 2 mm (C–D, D–E), and 0. Four cases which illustrate the difficulties of achieving healing are reported, and from these important aspects of treatment are highlighted. i am 21 and in good health, but for about three years now my perineum and the areas around it (scrotum and anus mainly) have been extremely itchy. Dansk: 21 årig kvindes anus med fremtrædende Perineal raphe (en sammensmeltning ved mellemkødet, oftest set hos mænd). This is especially true for people who have IBD, and in particular, Crohn's. Purpose of Review To discuss perineal and robotic approaches to gender-affirming vaginoplasty. Even though common in women, men can experience perineum pain too. Recent Findings The Davydov peritoneal vaginoplasty has its origins in neovaginal reconstruction for vaginal agenesis. The perineal raphe is generally considered to mark the line of fusion between the so-called urethral folds (Glenister 1954; Hamilton and Mossman 1972), or of a combination of urethral folds and scrotal swellings (Szenes 1925; Wartenberg 1993), or between urethral folds for the penile raphe and between scrotal swellings for the scrotal. The wound should be kept. Relieved to see that others have had experiences with the raphe area acting up but getting through it nonetheless. It is supplied by the fourth sacral nerve and by a branch derived from the perineal or sometimes from the inferior hemorrhoidal division of the pudendal nerve. Although the incidence and pathogenesis of perineal groove is unknown, there is. I have had a small hemroid for 14 years but it has never bothered me before so I don't think it's that. The vulva may appear pale or pink, sometimes with a white lacy pattern. Sperm are produced in the testes and stored in the. PERINEAL WOUNDS FOLLOWING HIDERADENITIS SUPPURATIVA AND TRAUMA. Perianal region is an extremely rare location for these lesions. Then pat the area dry. Been having some pain in my perineum area when I push to pee and today when I was showering I felt a bump in that area that kind of felt like a harder pimple. It is our belief that the majority of cases of perineal sinus are curable if certain principles of wound management are followed. I had really bad vaginal/vulvar pain for a while because of “vulvar varicosities” (in addition to hemorrhoids but their own separate beast, also in the family of varicose veins). changes of the urothelium, secondary to irritation or local stimulation, has been described[14], which. They are quite common and don't cause harm. In males, it is wrapped around the bulb of penis and corpus. I noticed the skin directly next to my perineal raphe (penis) has turned dark brown. Bulbospongiosus is a sexually dimorphic muscle, meaning that it is different among sexes. 1 – 3, 5. James Schumacher, in Equine Surgery (Fourth Edition), 2012. 8 ± 3. compared with his twin's perineal raphe and, whereas the raphe in the affected twin was of the calibre of the lead in a pencil, thatof the unaffected was of the calibre of a hog's bristle. Treatment of pruritus ani may include these four points:The perineum (pl. Learn more. If it was itching, I wouldnt ask in a bodymod subreddit. Median raphe cysts of the perineum are uncommon congenital lesions of the male genitalia. 2%. perineorrhaphy: [ per″ĭ-ne-or´ah-fe ] suture of the perineum . This is a painful, swollen area near the opening of your bottom (anus). A 10-month-old girl was referred to Pediatric Gynecology after her parents noticed an increasing genital bulge. The 2024 edition of ICD-10-CM L02. La protrusion pyramidale périanale est une entité d'individualisation récente, assez rare, touchant presque exclusivement le sexe féminin souvent en bas âge, d'origine congénitale, fonctionnelle ou associée au lichen scléroatrophique. scrotum and penis in men. The causes of perineal pain are pretty varied, but they fall into a few different categories. No sex in 4+ months. 1-3 The diagnosis can be made in early infancy through the preschool and early school years. Subsequent histopathological examination confirmed a median raphe cyst. The ID Reaction is usually symmetrical too. As the name suggests, perianal skin tags are soft growths that occur around the anus. On vulvar skin, the most common symptoms are soreness, burning, and rawness. It has been adapted as a robotic-assisted laparoscopic procedure and provides an alternative to perineal canal dissection in. Internal Medicine 38 years experience. 1 They outlined the embryologic fusion as a major pathogenetic mechanism, the benign course of the abnormality, and proposed complete surgical excision to avoid recurrence. The tissue is formed during fetal development, and it is believed to be a remnant of the embryonic structure that eventually becomes the vulva in females. It is found in both males and females, and arises from the fusion of the urogenital folds. Age: 25 Sex: Male Height: 5ft 9in (1. Median raphe cyst is an uncommon developmental anomaly that can develop anywhere along the midline of the external genitals. It is found in both. The anomalies which do occur in the median raphe are two: (1) cysts, which may have either stratified or columnar epithelial linings, and. skeletal muscle. Bifid scrotum is presented in a wide range of phenotypic forms, and simply classified to partial or complete. 6 7 14 Given that the perineal. This condition can also be caused by improper cleaning of the perineal area after using the toilet and also be caused by using toilet paper. Treatment of Pain Problems: What You Need to Know What is Perineal Pain? Live pain-free from perineal pain. Median raphe cysts of the perineum are uncommon congenital lesions of the male genitalia. With a perineal fistula, the abnormal anal opening is located outside of the sphincter muscle complex, such that the fistula usually has very few voluntary sphincter muscle fibers surrounding it. Incising the urethral mucosa may be. Dr. Dr. Oh, noticed a little bit of acne where there. Congenital perineal groove (CPG) is a rare malformation characterized by the presence of a moist sulcus with mucous membrane on the perineum since birth (1, 2). Thus far, there is no reported case of this anomaly in monozygotic twins. bulbospongiosus, in male. General causes, gynecologic causes, and abdominal causes. Created for people. [1] [2] The line is typically darker than the rest of the shaft skin, even though its shape and pigmentation may vary greatly among males. No trial reported on perineal trauma. An ID Reaction can be caused by treating the primary skin condition improperly. Outlook The perineum is the area between the genitals and the anus. New or worsening stomach pain. 会阴 (perineum)是人体 生殖器 到 肛门 间的间隙(space),主要是软组织构成;在 针灸学 是一个 任脉 穴 [1] 。. 225 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. 1. Median raphe cysts are cysts that develop on the median line in the male genital region in any area from the anus to the external meatus. How if you experience any of the following symptoms, please contact your clinician: Fever. The cyst is generally solitary, with the penile shaft being the most common location, with average size of around 1 cm. (A-D) A 10week fetus. 6 7 14 Given that the perineal. The most common treatment for perineal pain is rest; rest helps the body repair the damage. Perineal. A lump can also result from chronic injuries. [2],[3],[4],[7],[8],[9] In particular, chronic pain may be. The perineal raphe is a visible line or ridge of tissue on the human body that extends from the anus through the the area between the anus and the scrotum or vulva . Male here, I have nicked / cut part of the perineal raphe in the area between my scrotum and my butt. Median raphe cysts are a rare, congenital entity. The pudendal nerve supplies areas including the: lower buttocks. Record the pronunciation of this word in your own voice and play it to listen to how you have pronounced it. Age:22 Height:182cm Weight:60kg Race: Caucasian. Even intense itching, if left alone, will subside after 5-10 minutes. Antibiotics can help treat certain types of perineal pain. In addition, the fibers originate from. The perineal raphe is the noticeable line along the underside of the penis. New or worsening stomach pain. deep branch of the perineal nerve (from pudendal nerve) perineal a. REPORT OF A CASE An American of Bohemian ancestry, aged 23, was first seen on Feb. Earlier I had this problem while walking so I thought that it is because of my pubic hair so I cut them. Put a thin cloth between the ice and your skin. . How to pronounce perineal. The mechanism by which a damaging stimulus in the body is perceived as painful by the brain is a complex one which is not yet fully understood. 1). It is found in both males and females, and arises from the fusion of the urogenital folds. Subsequent histopathological examination confirmed a median raphe cyst. Perineal lacerations occur in up to 80% of vaginal deliveries. Try OTC Clotrimazole cream; if no better, see your doctor. Perineal groove is a rare anoperineal congenital malformation disease that usually affects newborn females. He had had a slight split in the median raphe of the prepuce since childhood. It was asymptomatic and patient was leading a normal sexual and. Itching and pain. 2 years. He recently finished a 2 month radiation treatment and will have to continue. . It is a basin-shaped muscular diaphragm that helps to support the visceral contents of the pelvis. Slight hyperpigmentation of the genital raphe is almost invariably present (Fig. But perineum pain can also be caused by injuries, urinary tract issues, infections, and other conditions. Noun [ edit] perineal raphe (plural perineal raphae) ( anatomy) The visible line that extends from the anus, through the mid-line of the scrotum and upwards through the posterior mid-line aspect of the penis. In humans, the scrotum becomes covered with pubic hair at puberty. Coccygodynia, sometimes referred to as coccydynia, coccalgia, coccygeal neuralgia or tailbone pain, is the term used to describe the symptoms of pain that occur in the region of the coccyx. In a new article, our colleagues from IFLScience have put forward a anatomical feature unknown: the perineal raphe. Median raphe cysts present anywhere between the external urethral meatus and the anus. The cyst may occur anywhere along the midline from glans to anus. The complete type has the sulcus extended from the posterior fourchette to the. Im 38 years old and have a scar on my penis (perineal raphe) which ive had for 20 years and is very noticable and is - Answered by a verified Doctor. anal herpes 2. local irritation as a result of wiping, and urinary tract infections. 3 ). It consists of two symmetrical parts, united along the median line by a tendinous perineal raphe. This line starts just anterior to the anus and extends. I have a discoloration rash which a doctor has diagnosed as. Its location may be related to anatomic characteristics of the perineum and median raphe. I use a small amount of Estrace cream as well as a steroid ointment once weekly as maintainance for Lichen Sclerosis. Perineal pyramidal protrusion is a lump or protrusion of perineal tissue near the anus of some young children, usually girls. Apply emollient or barrier creams to the anal area to. Voiding difficulties are common, especially in patients with pre-existing lower urinary tract symptoms, and acute urinary. Lower back pain; History of herpes zoster or trauma. Diagnosis can be made by taking some tissue (biopsy) and examining it under a microscope. The patient also has a dull aching pain in the anal canal sometimes. Both cysts and abscesses can cause. Infections from perineal tears or cuts are rare. Most UTIs affect the lower urinary tract, which includes your. If you have concerns, seek examination by Physician or Dentist. Put ice or a cold pack on the sore area for 10 to 20 minutes at a time. The raphe joins the internal. Other symptoms of genital herpes include: feeling exhausted or sick. A midline draining sinus tract was noted in the scrotal-perineal area. Referred pain: A variety of. I have been experiencing a little bit of disturbing kinda pain in perineal raphe of mine and i was thinking that it might be the pain because of the tangling of pubic hairs out there. A friend who had the same thing said that wearing compression tights really helped. This means that the cause of the itch is not found. I've had my family doctor give me - Answered by a verified Urologist. 1 Only a couple hundred case reports of median raphe cysts have been published in the English literature. A 32-year-old male asked: Currently, CPG can be divided into two types based on the morphology of perineum, complete and partial (2,3, 8). Perineal groove is a rare congenital malformation that is characterized by an exposed wet sulcus with nonkeratinized mucous membrane that extends from the posterior vaginal fourchette to the anterior ridge of the anal orifice. Fixes scars or removes scar tissue. Anyone who hasn't been through it cannot appreciate the level of misery it causes. Irritating, water/air type, itchy, inflammatory bumps/fluffiness. The perineal raphe is a visible line or ridge of tissue on the human body that extends from the anus through the perineum. Infection is treated with antibiotics. 29%) − Glans in wet diaper − ?Blood supply − Meatotomy −OR or officePerineal injury happens to the perineum, which is the part of the body between the genitals and anus. The infant showed no signs of pain, tenderness, pruritus, or other symptoms. I have been having pain between anus and scrotum for two months. This is accompanied by. Low malformations in girls,. Itchy Perineum! Hello. Raphe means the line of union of the two halves of various symmetrical parts, and the term median raphe refers to the perineal raphe, which is also known as the median raphe of perineum. Possible causes of pain in this area include tears during. Pat your perineum dry after leaving the bath instead of scrubbing. Adding vegetables and fiber, such as is found in a high fiber cereal like All-Bran or Fiber One or. rubrum and presents as an asymmetrical erythematous patch with a scaly, annular border in the groin. 48 yrs old Male asked about Perineal inflation, 1 doctor answered this and 70 people found it useful. mucus or pus-like discharge coming from the anus. You can find info on it online. Biopsy of vulva or perineum (separate procedure); 1 lesion. drinking and heart pain jumped 33 percent. Panel (A), including a longitudinal course of the penile urethra (UR), displays the most anterior side of photos. and had nearly 400,000 page views in 30 days. 1). Even if you haven't vaguely wondered that, we're going to tell you anyway: it is called a perineal raphe, and it formed while you were about seven weeks old in the womb. It is the result of a fetal developmental phenomenon whereby the scrotum (the developmental equivalent of the labia in females) and. Perineal groove is a rare congenital malformation characterized by a midline wet erythematous sulcus of the perineal raphe extending from the posterior fourchette to the anterior edge of anus with a normal anatomy of urethra, vagina and anus. Perianal tinea is uncommon. , 2022). He had no history of medical disease or con. Bacterial infections can lead to an inflammation of the prostate and it could be a cause of pain after ejaculation that you need to watch out for. Perineal groove is a rare congenital midline malformation of the perineal raphe. If you have pudendal neuralgia, this nerve is injured or compressed and causes stabbing, burning or shooting pain. Even if its a small thing, it bothers me quite a bit. Six cases are reported: five with canals or cysts of the genito-perineal raphe, one with a periurethral cyst. Irritating, itchy, inflammatory bumps/fluffiness. I don't know what caused it, though I suspect that, when I let my nasty cousin live with me. Pain in the area between the scrotum and the anus can be caused by chronic or acute prostatitis. raphe cyst of the perineum having ciliated cells in the cyst wall (the previously two reported cases being present on the penis)[11,12] in the English literature. Relaxation of the perineal muscles is important to permit movement of the probe within the rectum and to allow the introducer needle pass easily through to the levator muscles. Now i gone to doctor and he gave terbinafine & mometosone furoate cream base with itraconazole 100 mg. To prevent hip pain or muscle strain from the exaggerated range of motion, the legs should be raised and lowered slowly and simultaneously once in the stirrups. 1 2 3. compresses the vestibular bulb and constricts the vaginal orifice. The itching/burning/prickly feeling is unbearable and worse at night, and when I wipe after a bowel movement. Case report: cobblestone A 23 year old married man presented to the STD clinic with a complaint of gradual splitting of median raphe. Care of the wound and suture line is done as a clean rather than a sterile procedure. The perineal area needs extra care to heal after childbirth, including cool sitz baths to reduce swelling and speed healing. La rainure périnéale congénitale (perineal groove), est une malformation anopérinéale rare, survenant presque toujours chez des filles et correspondant à un rainure érythémateuse suintante, s’étendant de la fourchette vulvaire postérieure au bord antérieur de l’anus [1], [2], [3]. Microscopically, there is epidermal acanthosis, marked edema, and mild inflammatory. Frontal sections. : perineums or perinea) in humans is the space between the anus and scrotum in the male, or between the anus and the vulva in the female. Stars indicate an intermuscular space between the bulbospongiosus muscle (BS) and ischiocavernosus muscle (IC). Perineal trauma, also known as vaginal tears, is a very typical and expected side effect of vaginal delivery. The perineal raphe is a visible line or ridge of tissue on the body that extends from the anus through the perineum to scrotum (male) or labia majora (female). In cases of perineal pain caused by perineum tear or episiotomy, regular sitz baths, numbing spray, and pain reliever drugs may provide temporary relief. General causes, gynecologic causes, and abdominal causes. i have water/air type bumps/fluffiness on my penile raphe. . The term raphe designates a line on the surface of a fabric, and resembling a seam or a suture. It's situated between interior thighs and anal region. Perineal groove was extremely prevalent among the females: 25 of the 26 patients were girls, and only one patient was a boy. Teenage patients only occasionally are seen with idiopathic hemorrhoids. The perineum is the region between the thighs that includes the space between the genitals and anus. Perineal groove is a rare congenital midline malformation of the perineal raphe. As we have explored, it serves as a reminder of how all. 225 - other international versions of ICD-10 L02. [1]Lacerations on the perineum, cervix, vagina, and vulva can occur spontaneously or iatrogenically, as with an episiotomy. A perineal abscess is an infection that causes a painful lump in the perineum. Although the incidence and pathogenesis of perineal groove is unknown, there is a clear female predominance. I am a young (20 yrs) female and I have a question about the perineal raphe. This is a rare congenital midline malformation of the perineal raphe. Early perineal raphe seen in two male fetuses. See morePerineal raphe itching is most common in men than women and the reason behind this difference is unknown. It started out as an occasional itch, especially when i would sweat, but would go away after a day or so. increased bowel urgency. Sit in 8 to 10 centimetres of warm water (sitz bath) for 15 to 20 minutes 3 times a day and after bowel movements. Median raphe cyst is an uncommon, mostly asymptomatic condition in young patients. The cysts can occur at parameatus, glans penis, penile shaft, scrotum, or perineum. Introduction. Perineal groove is a rare congenital anomaly characterized by nonepithelialized mucous membrane that appears as an erythematous sulcus in the perineal midline, extending from the posterior vaginal fourchette to the anterior anal orifice. Pelvic and perineal pain. 會陰. Repeat the massage for 5-10 minutes total, taking breaks when you need to. We find broad structural homologies between male and female dogs related to erection,. I can hold it well with two fingers when pressed hard . The scrotum will usually tighten during penile erection and when. The congenital perineal groove: Defective recognition of a dermal defect. At this point, perineal raphe is formed. A perineal tear is a tear or injury to the skin and/or muscles between the vaginal introitus and the anal opening. Abstract. Median raphe cysts contain clear fluid, and may be up to 10 mm. The urethral opening is called the meatus and lies on the tip of the glans penis.