A tumor consisting of displaced ectodermal structures along the lines of embryonic fusion, the wall being formed of epithelium-lined connective tissue, including skin appendages, and containing keratin, sebum, and hair. (Stedman, 25th ed)
General term for CYSTS and cystic diseases of the OVARY.
Any fluid-filled closed cavity or sac that is lined by an EPITHELIUM. Cysts can be of normal, abnormal, non-neoplastic, or neoplastic tissues.
The "mouth floor" refers to the inferior aspect of the oral cavity, which is formed by the muscular floor of the mouth, consisting primarily of the mylohyoid muscle, and contains the opening of the sublingual and submandibular glands.
Neoplasms of the bony orbit and contents except the eyeball.
Intradermal or subcutaneous saclike structure, the wall of which is stratified epithelium containing keratohyalin granules.
A common congenital midline defect of fusion of the vertebral arch without protrusion of the spinal cord or meninges. The lesion is also covered by skin. L5 and S1 are the most common vertebrae involved. The condition may be associated with an overlying area of hyperpigmented skin, a dermal sinus, or an abnormal patch of hair. The majority of individuals with this malformation are asymptomatic although there is an increased incidence of tethered cord syndrome and lumbar SPONDYLOSIS. (From Joynt, Clinical Neurology, 1992, Ch55, p34)
Inflammation of the eyelids.
Neoplasms of the bony part of the skull.
Any of six membrane-covered openings between the CRANIAL SUTURES in the incompletely ossified skull of the fetus or newborn infant. The fontanelles normally close sometime after birth.
The segment of LARGE INTESTINE between ASCENDING COLON and DESCENDING COLON. It passes from the RIGHT COLIC FLEXURE across the ABDOMEN, then turns sharply at the left colonic flexure into the descending colon.

Three dimensional ultrasound and power doppler in assessment of uterine and ovarian angiogenesis: a prospective study. (1/135)

AIM: To determine whether three-dimensional power Doppler can improve the recognition of pelvic tumor morphology and angiogenesis. METHODS: Using this technique we analyzed 180 adnexal masses and 110 uterine lesions. Tumor volume, morphology, and vascularity were evaluated in each patient. Irregular and randomly dispersed vessels with complex branching depicted by comprehensive three dimensional display were suggestive of pelvic malignancy, while linear-like vascular morphology, single vessel arrangement and regular branching were typical for benign structures. RESULTS: Addition of qualitative analysis of vascular architecture of adnexal tumor to morphological parameters reached 96.15% sensitivity and 98.73% specificity. When endometrial lesions were prospectively analyzed, sensitivity and specificity were 91.67% and 98.49%, respectively. Because the lowest positive predictive value of 16.67% was obtained for myometrial lesions, this method should not be advised for their eva luation. CONCLUSION: Good results achieved by three dimensional ultrasound can be explained by improved recognition of the pelvic lesion anatomy, characterization of the surface features, detection of the tumor infiltration, and precise depiction of the size and volume. Three dimensional power Doppler imaging can detect structural abnormalities of the malignant tumor vessels, such as arteriovenous shunts, microaneurysms, tumoral lakes, disproportional calibration, coiling, and dichotomous branching. Therefore it enhances and facilitates the morphologic and functional evaluation of both benign and malignant pelvic tumors.  (+info)

Laparoscopic management of ovarian dermoid cysts: ten years' experience. (2/135)

OBJECTIVE: To determine the safety and efficacy of laparoscopic management of ovarian dermoid cysts based upon our ten years' experience. METHODS: Charts of 81 patients who underwent laparoscopic removal of dermoid cysts since March 1988 at Stanford University Medical Center or the Center for Special Pelvic Surgery in Atlanta were reviewed retrospectively. RESULTS: Ninety-three dermoid cysts with a mean diameter of 4.5 cm were removed in 81 patients. Operative techniques used were cystectomy for 70 cysts, salpingooophorectomy for 14, and 9 salpingo-oophorectomy with hysterectomy. Fifty-three cysts were treated via enucleation followed by cystectomy or salpingo-oophorectomy and removal through a trocar sleeve. Twenty-two were treated via enucleation and removal within an impermeable sack. Nine were treated via enucleation and removal by posterior colpotomy. Nine were removed via colpotomy following hysterectomy. We had a total of 39 spillages. Spillage rates varied with removal method: 32 (62%) for trocar removal without an endobag, 3 (13.6%) for removal within an endobag, and 4 (40%) with colpotomy removal. No spillage occurred for the nine patients who had a colpotomy done for hysterectomy. Mean hospital stay after surgery was 0.98 days, and there were no intraoperative complications. In one case, there was a postoperative complication of an incisional infection in the umbilicus. CONCLUSION: Including this and 13 other studies, review of the literature reveals a 0.2% incidence of chemical peritonitis following laparoscopic removal of dermoid cysts. Thus, we conclude that laparoscopic management of dermoid cysts is a safe and beneficial method in selected patients when performed by an experienced laparoscopic surgeon.  (+info)

Ruptured intracranial dermoids: magnetic resonance imaging. (3/135)

Rupture of intracranial dermoids tumour is rare and carries with it the risk of significant morbidity as well as fatality. Three cases that presented with varying symptoms ranging from headache to chiasmatic compression and suspected to have rupture of dermoid tumour are described. The importance of MR imaging in their diagnosis is discussed.  (+info)

Multiple dermoid cysts of omentum. (4/135)

Dermoid cyst of the omentum is an extremely rare condition. We report a case of multiple dermoid cysts of omentum in a 50 years old woman. The aetiopathogenesis, clinical presentation and relevant literature is briefly reviewed.  (+info)

Epithelial and muscle antigens in benign cystic teratomas of ovary. (5/135)

Thirty beign cystic teratomas of the ovary were studied by immunofluroesecence, using specific human antisera for (a) squamous epithelial intercellular areas (pemphigus sera), (b) squamous epithelial basement membranes (bullous pemphigoid sera), (c) smooth muscle (chronic active hepatitis sera, and (d) striated muscle (thymona sera). Squamous epithelial intercellular staining was seen in all specimens and was present in the basal cell layers as well as in the prickle cell layers, suggesting a slow regeneration rate for the squamous epithelial lining of these tumors. Well-formed basement membranes were identified at the periphery of all squamous epithelial structures. Smooth muscle was found in 73% of the neoplasms, and the immunoflurorescent findings correlated with light microscopy. No skeletal muscle components were identified. Within the limits of the antibodies used and the antigens detected, these resutlts support the concept that benign ovarian cystic teratomas are composed of mature, heterotopic tissue elements.  (+info)

Contrast-enhanced sonography in the examination of benign and malignant adnexal masses. (6/135)

Our objective was to characterize the properties of an intravascular ultrasonographic contrast agent in examination of adnexal masses and to compare contrast agent properties between benign and malignant adnexal tumors. Fifty-eight consecutively examined women with suspected ovarian tumors were examined preoperatively by power Doppler ultrasonography, first without and then with contrast agent enhancement (Levovist). Fourteen women had ovarian cancer, 3 had borderline ovarian tumors, 18 had benign ovarian neoplasms, and 23 had functional adnexal cystic masses or endometriomas. The effect of the contrast agent was evaluated visually and by using computerized power Doppler signal intensity measurements. In visual evaluation, the brightness of the power Doppler signal and the amount of recognizable vascular areas increased in each tumor after contrast agent administration. The number of vessels in power Doppler ultrasonograms, both before and after contrast agent enhancement, was significantly higher in malignant than in benign adnexal masses, as also was the increase in the number of recognizable vessels after contrast agent administration. Contrast agent uptake time was significantly shorter in malignant than in benign tumors. No significant differences were found in the power Doppler signal intensities or their changes between benign and malignant tumors. In conclusion, use of sonographic contrast agent facilitates imaging of tumor vessels. For differentiation of benign and malignant tumors, the kinetic properties of the contrast agent, such as uptake and washout times, may have more potential than the use of the contrast agent in anatomic imaging of the tumor vessels.  (+info)

Sonographic and clinical characteristics of struma ovarii. (7/135)

Our objective was to evaluate the preoperative clinical, laboratory, and sonographic characteristics of struma ovarii in comparison to ovarian dermoid cysts. A retrospective review of gynecologic patients operated on for mature cystic teratoma over a 10 year period identified 12 cases of struma ovarii. These cases, combined with 4 additional cases from an earlier report, were the subject of this study. Results were compared to 32 cases of ovarian dermoid cysts. Ovarian struma ovarii occurred in 12 (4.8%) of 251 cases of ovarian dermoid cysts. Most patients were premenopausal, and the mean lesion diameter was 57.3 mm (range, 30-95 mm). Struma ovarii occurred more frequently (68.8%) in the right adnexa and was seen with a normal CA-125 level. Blood flow, assessed by Doppler ultrasonography, was located in the center of the lesion in all cases of struma ovarii. Rare cases were seen with elevated tumor markers and low resistance blood flow. With regard to dermoid cysts, blood flow had a higher resistive index. In addition, no blood flow could be detected from the center of the echoic lesion in dermoid cysts (P < 0.0001). In summary, it is difficult to distinguish between struma ovarii and dermoid cysts on the basis of their sonographic appearance. Nevertheless, Doppler flow may aid in the preoperative diagnosis of struma ovarii. Blood flow signals, detected from the center of the echoic lesion, and low resistance to flow may be more common in struma ovarii.  (+info)

The characterization of common ovarian cysts in premenopausal women. (8/135)

OBJECTIVES: The evaluation of the predictive value of transvaginal ultrasound in the assessment of benign adnexal pathology in premenopausal women, based on the recognition of characteristic morphologic patterns particular to endometriotic and dermoid ovarian cysts. METHODS: This was a prospective study. All premenopausal women undergoing surgery for a suspected ovarian cyst underwent a transvaginal ultrasound examination in the week prior to surgery. Between June 1997 and January 2000, 132 women underwent surgery for a suspected ovarian endometrioma or dermoid cyst. The endpoints were either the direct visualization of the cyst wall and contents at surgery, or the histologic evaluation of removed tissues. RESULTS: Of 83 suspected endometriomas (11 bilateral), 80 were confirmed at surgery and of 68 suspected benign cystic teratomas (eight bilateral), 66 were confirmed by histology. The positive predictive value of transvaginal ultrasonography for the diagnosis of endometrioma and dermoid cysts was 96.4% and 97.1%, respectively. The false positive rates were 3.8% and 3.0%, respectively. There were no malignancies in either group. CONCLUSIONS: Based on the recognition of characteristic ultrasound patterns alone, the positive predictive value of transvaginal ultrasonography for the diagnosis of these common, benign cysts in premenopausal women is very high and can be used reliably to select women for appropriate surgery.  (+info)

A dermoid cyst is a type of benign (non-cancerous) growth that typically develops during embryonic development. It is a congenital condition, which means it is present at birth, although it may not become apparent until later in life. Dermoid cysts are most commonly found in the skin or the ovaries of women, but they can also occur in other areas of the body, such as the spine or the brain.

Dermoid cysts form when cells that are destined to develop into skin and its associated structures, such as hair follicles and sweat glands, become trapped during fetal development. These cells continue to grow and multiply, forming a sac-like structure that contains various types of tissue, including skin, fat, hair, and sometimes even teeth or bone.

Dermoid cysts are usually slow-growing and may not cause any symptoms unless they become infected or rupture. In some cases, they may cause pain or discomfort if they press on nearby structures. Treatment typically involves surgical removal of the cyst to prevent complications and alleviate symptoms.

An ovarian cyst is a sac or pouch filled with fluid that forms on the ovary. Ovarian cysts are quite common in women during their childbearing years, and they often cause no symptoms. In most cases, ovarian cysts disappear without treatment over a few months. However, larger or persistent cysts may require medical intervention, including surgical removal.

There are various types of ovarian cysts, such as functional cysts (follicular and corpus luteum cysts), which develop during the menstrual cycle due to hormonal changes, and non-functional cysts (dermoid cysts, endometriomas, and cystadenomas), which can form due to different causes.

While many ovarian cysts are benign, some may have malignant potential or indicate an underlying medical condition like polycystic ovary syndrome (PCOS). Regular gynecological check-ups, including pelvic examinations and ultrasounds, can help detect and monitor ovarian cysts.

A cyst is a closed sac, having a distinct membrane and division between the sac and its surrounding tissue, that contains fluid, air, or semisolid material. Cysts can occur in various parts of the body, including the skin, internal organs, and bones. They can be caused by various factors, such as infection, genetic predisposition, or blockage of a duct or gland. Some cysts may cause symptoms, such as pain or discomfort, while others may not cause any symptoms at all. Treatment for cysts depends on the type and location of the cyst, as well as whether it is causing any problems. Some cysts may go away on their own, while others may need to be drained or removed through a surgical procedure.

The term "mouth floor" is not a standard medical terminology. However, it might refer to the floor of the mouth, which is the part of the oral cavity located beneath the tongue and above the hyoid bone, which is a U-shaped bone in the front of the neck that helps support the tongue. The mouth floor contains several salivary glands, muscles, and nerves that are important for functions such as swallowing and speaking.

Orbital neoplasms refer to abnormal growths or tumors that develop in the orbit, which is the bony cavity that contains the eyeball, muscles, nerves, fat, and blood vessels. These neoplasms can be benign (non-cancerous) or malignant (cancerous), and they can arise from various types of cells within the orbit.

Orbital neoplasms can cause a variety of symptoms depending on their size, location, and rate of growth. Common symptoms include protrusion or displacement of the eyeball, double vision, limited eye movement, pain, swelling, and numbness in the face. In some cases, orbital neoplasms may not cause any noticeable symptoms, especially if they are small and slow-growing.

There are many different types of orbital neoplasms, including:

1. Optic nerve glioma: a rare tumor that arises from the optic nerve's supportive tissue.
2. Orbital meningioma: a tumor that originates from the membranes covering the brain and extends into the orbit.
3. Lacrimal gland tumors: benign or malignant growths that develop in the lacrimal gland, which produces tears.
4. Orbital lymphangioma: a non-cancerous tumor that arises from the lymphatic vessels in the orbit.
5. Rhabdomyosarcoma: a malignant tumor that develops from the skeletal muscle cells in the orbit.
6. Metastatic tumors: cancerous growths that spread to the orbit from other parts of the body, such as the breast, lung, or prostate.

The diagnosis and treatment of orbital neoplasms depend on several factors, including the type, size, location, and extent of the tumor. Imaging tests, such as CT scans and MRI, are often used to visualize the tumor and determine its extent. A biopsy may also be performed to confirm the diagnosis and determine the tumor's type and grade. Treatment options include surgery, radiation therapy, chemotherapy, or a combination of these approaches.

An epidermal cyst is a common benign skin condition characterized by the growth of a sac-like structure filled with keratin, a protein found in the outermost layer of the skin (epidermis). These cysts typically appear as round, firm bumps just under the surface of the skin, often on the face, neck, trunk, or scalp. They can vary in size from a few millimeters to several centimeters in diameter.

Epidermal cysts usually develop as a result of the accumulation of dead skin cells that become trapped within a hair follicle or a pilosebaceous unit (a structure that contains a hair follicle and an oil gland). The keratin produced by the skin cells then collects inside the sac, causing it to expand gradually.

These cysts are generally slow-growing, painless, and rarely cause any symptoms. However, they may become infected or inflamed, leading to redness, tenderness, pain, or pus formation. In such cases, medical attention might be necessary to drain the cyst or administer antibiotics to treat the infection.

Epidermal cysts can be removed surgically if they cause cosmetic concerns or become frequently infected. The procedure typically involves making an incision in the skin and removing the entire sac along with its contents to prevent recurrence.

Spina Bifida Occulta is a type of spinal dysraphism, which is a birth defect involving incomplete closure of the spine. In Spina Bifida Occulta, the spinal bones (vertebrae) do not fully form and close around the spinal cord during fetal development, leaving a small gap or split in the lower back region. However, the spinal cord and nerves usually develop normally and are not exposed or damaged, unlike in more severe forms of spina bifida.

In many cases, individuals with Spina Bifida Occulta do not experience any symptoms and may not even know they have the condition unless it is discovered during an imaging test for another reason. In some instances, people with this condition might develop late-onset neurological symptoms or complications such as back pain, muscle weakness, or changes in bladder or bowel function.

It's essential to note that while Spina Bifida Occulta is generally less severe than other forms of spina bifida, it can still pose risks and may require medical evaluation and monitoring to ensure proper development and address any potential issues.

Blepharitis is a common inflammatory condition that affects the eyelids, specifically the eyelash follicles and the edges of the eyelids (called the "eyelid margins"). It can cause symptoms such as redness, swelling, itching, burning, and a crusty or flaky buildup on the lashes. Blepharitis can be caused by a variety of factors, including bacterial infection, skin disorders like seborrheic dermatitis or rosacea, and meibomian gland dysfunction. It is often a chronic condition that requires ongoing treatment to manage symptoms and prevent recurrence.

Skull neoplasms refer to abnormal growths or tumors that develop within the skull. These growths can be benign (non-cancerous) or malignant (cancerous). They can originate from various types of cells, such as bone cells, nerve cells, or soft tissues. Skull neoplasms can cause various symptoms depending on their size and location, including headaches, seizures, vision problems, hearing loss, and neurological deficits. Treatment options include surgery, radiation therapy, and chemotherapy. It is important to note that a neoplasm in the skull can also refer to metastatic cancer, which has spread from another part of the body to the skull.

Cranial fontanelles, also known as "soft spots," are the membrane-covered spaces between the bones of a newborn or infant's skull. There are six fontanelles in total: two anterior (frontal) fontanelles, two posterior (occipital) fontanelles, and two smaller sphenoid and mastoid fontanelles.

The anterior fontanelle is the most prominent and is located towards the front of the head. It typically measures about 1 to 2 inches in diameter at birth and closes by around 18-24 months of age as the bones of the skull grow together. The posterior fontanelle is smaller, located towards the back of the head, and usually closes by around 2 months of age.

The fontanelles allow for the baby's brain to grow rapidly during the first few months of life, and they also provide some flexibility during childbirth, allowing the skull bones to overlap and make it easier for the baby to pass through the birth canal. It is important to handle a newborn gently, especially around the fontanelles, as they are still developing and can be injured easily.

The transverse colon is the section of the large intestine that runs horizontally across the abdomen, located between the ascending colon and the descending colon. It receives digested food material from the left side of the cecum via the transverse mesocolon, a double-layered fold of peritoneum that attaches it to the posterior abdominal wall.

The transverse colon is responsible for absorbing water, electrolytes, and vitamins from the digested food material before it moves into the distal sections of the large intestine. It also contains a large number of bacteria that help in the breakdown of complex carbohydrates and the production of certain vitamins, such as vitamin K and biotin.

The transverse colon is highly mobile and can change its position within the abdomen depending on factors such as respiration, digestion, and posture. It is also prone to various pathological conditions, including inflammation (colitis), diverticulosis, and cancer.

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