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Cyst

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21961. Popliteal glomangioma mimicking Baker's cyst in a 9-year-old child: an unusual location of a glomus tumor. (Abstract)

Popliteal glomangioma mimicking Baker's cyst in a 9-year-old child: an unusual location of a glomus tumor. Popliteal cysts (Baker's cyst) are very common conditions in children. However, in the differential diagnosis of popliteal cysts in childhood, glomus tumor is the most infrequent diagnosis. This is a relatively uncommon soft tissue tumor that can occur at any age and any anatomic site, with a predilection for the subungual region. In the reported series, extradigital glomangiomas involving (...) the knee are located in the patellar ligament, quadriceps tendon, patellar fat pad, and popliteal fossa. In this study, I present a second case of glomus tumor located in the popliteal fossa and misdiagnosed as a Baker's cyst. I also review the "around-the-knee glomus tumors" that have been discussed in the literature to date.

2003 Arthroscopy

21962. Primary spinal extradural hydatid cyst in a child: case report and review of the literature. Full Text available with Trip Pro

Primary spinal extradural hydatid cyst in a child: case report and review of the literature. Spinal hydatid cyst is a rare but serious condition. An 8-year-old boy presented with back pain, progressive weakness and numbness in both legs. Magnetic resonance imaging (MRI) of the lumbar region showed a cystic lesion with regular contour located in extradural space. There was cerebrospinal fluid- (CSF-) like signal intensity on T1- and T2-weighted images. The lesion had excessively compressed (...) the dural sac and caudal roots, and expanded to the L3 and L4 neural foramina. The case was explored with L2, L3, L4 laminectomy and the hydatid cyst was removed totally. The clinical presentation, diagnosis and surgical treatment of this rare case of spinal hydatid disease is discussed, and all available cases of primary extradural hydatid cyst reported in the literature are presented.

2002 European Spine Journal

21963. Calretinin expression in odontogenic cysts. (Abstract)

Calretinin expression in odontogenic cysts. Calretinin is a calcium-binding protein with a possible role as a calcium buffer, calcium-sensor, or regulator of apoptosis. Calretinin is expressed in neural tissue, is a specific marker of mesothelial cells, and has been demonstrated in the odontogenic epithelium during odontogenesis in rat molar tooth germs. Moreover, it has been found to be expressed in a high proportion of solid, unicystic, and multicystic ameloblastomas, whereas, on the contrary (...) , no positive staining has been found in odontogenic keratocysts, residual cysts, and dentigerous cysts. The purpose of this study was to evaluate calretinin expression in radicular cysts, follicular cysts, orthokeratinized keratocysts, and parakeratinized keratocysts. A total of 70 odontogenic cysts, 24 radicular cysts, 24 follicular cysts, and 22 odontogenic keratocysts (10 orthokeratinized keratocysts, 12 parakeratinized keratocysts) were evaluated. All the radicular cysts, follicular cysts

2003 Journal of Endodontics

21964. Conservative treatment of a radicular cyst in a 5-year-old child: a case report. (Abstract)

Conservative treatment of a radicular cyst in a 5-year-old child: a case report. The present report describes the management of a radicular cyst in a 5-year-old child. The treatment comprised extraction of the primary teeth involved followed by marsupialization. A removable appliance with a resin extension penetrating into the cystic cavity was used to help decompress the lesion. This treatment allowed rapid healing of the lesion and eruption of the permanent incisors without the need

2003 International Journal of Paediatric Dentistry

21965. Branchial cleft or cervical lymphoepithelial cysts: etiology and management. (Abstract)

Branchial cleft or cervical lymphoepithelial cysts: etiology and management. The cervical lymphoepithelial or branchial cleft cyst is a developmental cyst that has a disputed pathogenesis. The objective of this article is to provide a brief review of the literature and to define diagnostic terms related to this anomaly, as well as to describe its etiology, clinical presentation and treatment.The cervical lymphoepithelial or branchial cleft cyst usually presents as a unilateral, soft-tissue (...) fluctuant swelling that typically appears in the lateral aspect of the neck, anterior to the sternocleidomastoid muscle, and becomes clinically evident late in childhood or in early adulthood. Clinicians can diagnose the cyst with appropriate imaging to assess the extent of the lesion before definitive surgical treatment. The authors describe a patient who underwent excision of a well-encapsulated cystic structure that was diagnosed as a branchial cleft cyst.The cervical lymphoepithelial or branchial

2003 Journal of the American Dental Association

21966. Immunolocalization of PTCH protein in odontogenic cysts and tumors. (Abstract)

Immunolocalization of PTCH protein in odontogenic cysts and tumors. The human patched gene (PTCH) functions in both embryologic development and tumor suppression. PTCH mutations have been found in odontogenic keratocysts. However, the expression and localization of the protein product of the gene have not been determined in odontogenic tumors and cysts. We investigated 68 odontogenic lesions by immunohistochemistry, and compared their PTCH expression with that in basal cell carcinomas. All

2002 Journal of Dental Research

21967. Subchondral cysts arise in the anterior acetabulum in dysplastic osteoarthritic hips. (Abstract)

Subchondral cysts arise in the anterior acetabulum in dysplastic osteoarthritic hips. The distribution of subchondral cysts in 57 dysplastic osteoarthritic hips of 38 patients was assessed by computed tomography and by a new computerized technique. The cyst count in osteoarthritic hips was inversely correlated with the width of the joint space. A greater accumulation of cysts was found in the acetabulum than in the femoral head, and more cysts were found in the anterior part of the hip than

2002 Clinical Orthopaedics and Related Research

21968. The rhomboid flap: a simple technique to cover the skin defect produced by excision of a mucous cyst of a digit. (Abstract)

The rhomboid flap: a simple technique to cover the skin defect produced by excision of a mucous cyst of a digit. Rhomboid flaps were used rather than rotation flaps for skin cover after excision of mucous cysts of the finger in six patients. The rhomboid flap is a safe, reliable technique which is more easily taught and applied than the rotation flap.

2003 The Journal of Bone and Joint Surgery British Volume

21969. Heterogeneity of presenile dementia with bone cysts (Nasu-Hakola disease): three genetic forms. (Abstract)

Heterogeneity of presenile dementia with bone cysts (Nasu-Hakola disease): three genetic forms. Nasu-Hakola disease (NHD) is an autosomal recessive disorder characterized by presenile dementia and bone cysts. Finnish patients revealed a large deletion in DAP12 gene encoding a key element for transducing activation signal. The authors examined six Japanese cases for DAP12 alleles. Five of the six had loss-of-function mutation, either a single-base deletion or a novel point mutation. The single

2002 Neurology

21970. Do quiescent arachnoid cysts alter CNS functional organization?: A fMRI and morphometric study. (Abstract)

Do quiescent arachnoid cysts alter CNS functional organization?: A fMRI and morphometric study. To investigate whether congenital and clinically quiescent arachnoid cysts (AC) in the left temporal fossa alter the functional organization of adjacent cortices.fMRI mapping was applied in five right-handed asymptomatic patients to determine the functional organization of language. Moreover, morphometry was performed in each patient to gain the size of cortical surface areas and cortical thickness (...) values in the neighboring brain adjacent to the AC and explicitly in the left opercular region.Four patients showed a clear left hemisphere language dominance regardless of the cyst size; a mixed laterality of language organization was found in the remaining patient. An interesting dissociation of morphometric data was assessed when comparing strongly language-related cortices in the inferior frontal gyrus with the entire neighboring cortices. Morphometry in the neighboring brain regions of the AC

2002 Neurology

21971. FKRP gene mutations cause congenital muscular dystrophy, mental retardation, and cerebellar cysts. (Abstract)

FKRP gene mutations cause congenital muscular dystrophy, mental retardation, and cerebellar cysts. Congenital muscular dystrophies (CMD) are autosomal recessive disorders that present within the first 6 months of life with hypotonia and a dystrophic muscle biopsy. CNS involvement is present in some forms. The fukutin-related protein gene (FKRP) is mutated in a severe form of CMD (MDC1C) and a milder limb girdle dystrophy (LGMD2I). Both forms have secondary deficiencies of laminin alpha2 (...) and alpha-dystroglycan immunostaining. Structural brain involvement has not been observed in patients with FKRP gene mutations.The authors studied two unrelated patients who had a pattern of muscle involvement identical to MDC1C, mental retardation, and cerebellar cysts on cranial MRI. The FKRP gene was analyzed along with the skeletal muscle expression of laminin alpha2 and alpha-dystroglycan.The muscle biopsy of both patients showed severe dystrophic findings, a reduction in laminin alpha2

2003 Neurology

21972. Genetic heterogeneity of megalencephalic leukoencephalopathy and subcortical cysts. (Abstract)

Genetic heterogeneity of megalencephalic leukoencephalopathy and subcortical cysts. Reported are the clinical, neuroradiologic, and molecular findings in 18 patients with megalencephalic leukoencephalopathy and subcortical cysts (MLC) syndrome. Marked clinical intrafamilial and interfamilial variability in mutation-proven cases was found. A broad spectrum of pathogenetic mutations (missense, splice site, insertion, and deletions) were identified in the MLC1 gene, enlarging the spectrum

2003 Neurology

21973. Intramuscular hydatid cyst of the medial rectus muscle. (Abstract)

Intramuscular hydatid cyst of the medial rectus muscle. To describe a unique case of orbital hydatid cyst that was located solely within the medial rectus muscle.Retrospective, interventional case report.A 20-year-old woman presented with right periocular pain induced by ocular movements. Magnetic resonance imaging studies showed a focal, well-circumscribed intramuscular cystic lesion of the right medial rectus muscle. The cyst was completely extirpated from the muscle, but some of the fluid (...) content escaped into the surrounding tissues. Irrigation with hypertonic saline was performed.Histopathologic examination showed an acellular cyst wall with inner germinal layer, diagnostic for hydatid cyst. Two cycles of oral albendazole were administered with no recurrence.In the orbit, hydatid cyst may be localized primarily within an extraocular muscle and produce painful eye movements. Hydatid cyst must be considered in the differential diagnosis of solitary cystic enlargements of extraocular

2003 American Journal of Ophthalmology

21974. Surgical management of anterior chamber epithelial cysts. (Abstract)

Surgical management of anterior chamber epithelial cysts. To review management strategies for treatment of anterior chamber epithelial cysts.Retrospective review of consecutive interventional case series.Charts of patients treated for epithelial ingrowth over a 10-year period by a single surgeon were reviewed. Cases of anterior chamber epithelial cysts were identified and recorded, including details of ocular history, preoperative and postoperative acuity, intraocular pressure (IOP), and ocular (...) examination, type of surgical intervention, and details of further procedures performed.Seven eyes with epithelial cysts were identified. Patient age ranged from 1.5 to 53 years at presentation. Four patients were children. In four eyes, cysts were secondary to trauma, one case was presumably congenital, one case developed after corneal perforation in an eye with Terrien's marginal degeneration, and one case developed after penetrating keratoplasty (PK). Three eyes were treated with vitrectomy, en bloc

2003 American Journal of Ophthalmology

21975. Simultaneous ipsilateral temporal fossa and orbital dermoid cysts. (Abstract)

Simultaneous ipsilateral temporal fossa and orbital dermoid cysts. To describe a case of simultaneous dermoid cysts in the lateral orbit and temporal fossa.Interventional case report.A 7-year-old boy with a lateral orbital mass and infratemporal fossa mass underwent computed tomography and surgical excision.Intraoperatively, two distinct cystic lesions were identified. The orbital lesion extended just beneath the lateral rim. The temporal fossa lesion extended posteriorly along the temporal (...) fossa. No bony defect in the lateral orbital wall was identified, and each distinct lesion was completely excised.To our knowledge, this is the first reported case of multiple dermoid cysts in the orbital region. When imaging studies demonstrate separate cystic lesions and do not reveal a bony defect in the lateral orbital wall, multiple lesions should be suspected.Copyright 2003 by Elsevier Science Inc.

2003 American Journal of Ophthalmology

21976. Iris cyst secondary to latanoprost mimicking iris melanoma. (Abstract)

Iris cyst secondary to latanoprost mimicking iris melanoma. To report an ocular side effect of topical latanoprost therapy.Single interventional case report.A 73-year-old woman on latanoprost for primary open-angle glaucoma developed an iris cyst simulating an iris melanoma.The lesion disappeared over 8 weeks when latanoprost was stopped.In managing patients with iris-pigmented lesions, the list of medications should be reviewed. If the patient takes latanoprost, a trial off latanoprost

2003 American Journal of Ophthalmology

21977. Ultrasound findings in orbital hydatid cysts. (Abstract)

Ultrasound findings in orbital hydatid cysts. To describe the ultrasound features seen in orbital hydatid disease, which may confirm the diagnosis preoperatively.Interventional case series.Nine patients of orbital hydatid cyst were evaluated preoperatively with ultrasound and computed tomography scans. The diagnostic features seen on ultrasound as well as the CT features are described. All patients underwent surgery to remove the cyst, and the diagnosis was confirmed surgically in all nine (...) cases.We found that ultrasound was most helpful in diagnosing a hydatid cyst, even more so than a computed tomography scan, and we saw a diagnostic "double wall" sign in all cases, on ultrasound, a sign not previously described in orbital hydatids.It is difficult to diagnose an orbital hydatid cyst preoperatively. However, we found that the double wall sign could be elicited ultrasonically in all cases of hydatid cyst, if looked for carefully, and the diagnosis could be confirmed.

2003 American Journal of Ophthalmology

21978. Digital infrared photography assists in the detection of iris and ciliary body cysts. (Abstract)

Digital infrared photography assists in the detection of iris and ciliary body cysts. To report a case that illustrates the utility of digital infrared photography in the detection of iris and ciliary body cysts in an asymptomatic patient.Digital infrared photography of the iris was performed in both eyes of a 50-year-old white woman who presented with bilateral endothelial pigment dusting and subtle iris transillumination defects.Infrared photography revealed a pronounced, rounded patch (...) of transillumination in the periphery of the left iris. Also observed were focal, rounded regions of reduced transmittance in the peripheral iris of both eyes. These findings suggested the presence of bilateral iris and ciliary body cysts. High-resolution ultrasound biomicroscopic images were consistent with this suspicion.Digital infrared photography of the iris may be useful in the detection and evaluation of iris and ciliary body cysts.

2003 Journal of Glaucoma

21979. Epithelial iris cyst treatment with intracystic ethanol irrigation. (Abstract)

Epithelial iris cyst treatment with intracystic ethanol irrigation. To report the therapeutic effects of ethanol (ETOH) irrigation into epithelial iris cysts (EIC).Retrospective noncomparative interventional case series.102 eyes of 102 patients aged between 4 and 71 years with EIC, with 4 months to 15 years follow-up.Under local or general anesthesia, cyst fluid was drained gently via a 27-gauge needle. Without changing the position of the needle, the syringe was replaced with one containing (...) an equal amount of ETOH to the drained cyst fluid, and ETOH was gently irrigated into the cyst. The ETOH was left inside until the cyst wall turned white (about one minute). The ETOH was aspirated and the needle removed. After the irrigation, patients were treated with atropine 1% and dexamethasone 5 ml eye drops.Pretreatment findings suggest that the bases of all the cysts were connected either to incisions made during previous operations or to sites of laceration from penetrating trauma. Three types

2003 Ophthalmology

21980. The management of orbital cysts associated with congenital microphthalmos and anophthalmos. Full Text available with Trip Pro

The management of orbital cysts associated with congenital microphthalmos and anophthalmos. To study the management of the orbital cysts present in a group of patients with anophthalmos and microphthalmos.A retrospective study of 34 patients (40 orbits) treated for orbital cyst associated with microphthalmos and anophthalmos.The two largest treatment groups comprised 17 orbits (42.5%) where the cyst was removed surgically and 17 orbits (42.5%) where the cyst was retained and conformers were (...) used. The remaining cases comprised two orbits (5%) where the cyst was aspirated initially; two orbits (5%) with large cysts which will need to be excised after further orbital growth; one orbit (2.5%) in which a silicone expander was used initially, and one orbit (2.5%) in which a mildly microphthalmic eye had some vision and was monitored but required no surgery.In this study 33 out of 34 patients had a good cosmetic result which illustrates that the orbital cyst in microphthalmos or anophthalmos

2003 British Journal of Ophthalmology

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