Intramuscular Cyst Research Articles

Kyste hydatique intermusculaire isolé du bras : à propos d’un cas

Musculosquelettal hydatid cysts are extremely rare and usually result from the spreading of hydatidosis from other areas to other regions of the body. We present an unusual case of a primary hydatid cyst of the intermuscular space of the anterior compartment of arm in a 30-year-old man, presenting as an enlarging soft-tissue tumor. Magnetic resonance imaging examination revealed a multilocular intramuscular cyst. The entire cyst was surgically removed, and histopathological examinations confirmed the diagnosis, Antihelmintic chemotherapy was performed for 6weeks. No recurrence was observed 2years after surgery. To our knowledge, this observation is the second isolated intermuscular hydatid cyst in the medical literature. The diagnosis must be kept in mind in front of soft-tissue tumors.

Infected primary hydatid cyst located in the Sartorius muscle

Primary intramuscular hydatid cyst should be considered for the differential diagnosis of cystic soft tissue masses especially in the endemic areas though primary muscular hydatidosis is a rare clinical entity. We aimed to report the case of a 30-year-old female patient with infected primary intramuscular hydatid cyst located in the sartorius muscle.

Intramuscular and subcutaneous coenurosis in goats and sheep in south-east Iran

A 1-year study was conducted in a Kerman slaughterhouse over four seasons between 2009 and 2010. In this study, 66,114 slaughtered sheep and 47,805 slaughtered goats were carefully inspected for the presence of intramuscular or subcutaneous coenurosis cysts. Additionally, the skull of infected animals was also inspected for the presence of brain cysts. Suspected samples were transported in formalin to the food hygiene controlling lab. For each sample, characteristics of the coenurosis cyst such as number, size and scolex were determined. According to the results, 36 (0.03 %) carcasses were infected, 32 goats (0.07 %) and four sheep (0.01 %). There was a significant difference in size (length and width) of the cyst and number of scolex between goats and sheep (p 0.05). This is the first report of non-cerebral coenurosis in sheep in Iran.

Primary intramuscular hydatid cyst: A rare case report

Hydatid disease has a worldwide distribution and causes health problems in endemic countries. The prevalence of primary muscular hydatid disease is reported to be only 0.5% because muscle is an unfavorable site for infestation as a result of its high levels of lactic acid. Primary intramuscular hydatid cyst presents a diagnostic problem not only because of the unusual location and low prevalence, but also because complicated cysts may imitate solid or complex lesions. We report an unusual case of primary hydatidosis of the calf muscles, in which a wide excision was performed without causing any damage to the cyst wall. Injudicious approach in the management of these rare presentations may be the root cause of severe anaphylactic shock and systemic dissemination. Intramuscular hydatid cysts grow gradually and may mimic a soft tissue tumor; thus, the diagnosis of soft-tissue hydatid cysts needs a high index of suspicion.

Intramuscular Baker's Cyst in Plantaris: A Case Report

Baker’s cyst is found as most frequent cystic mass around the knee occurring between medial head of gastrocnemius muscle and semimembranosus muscle. The proximal or posterolateral extension of the cyst had been rarely reported and the cyst into the surrounding muscular tissue extremely rare. Intramuscular Baker's cyst that we report was found between lateral head of gastrocnemius muscle and popliteus tendon, and then extended into the plantaris muscle. With review of the literature, we here report a very rare case of plantaris muscular extension of Baker’s cyst.

•Two cases of primary intramuscular hydatid cyst in the same family

Otuz dokuz yasindaki bayan hasta sol lumbar sislik ve agri sikayetleri ile poliklinige basvurdu. Hastanin aile oy­kusunde 19 yasindaki kizinin sol gastrokinemius kasinda primer kist hidatik sebebiyle bir yil once ameliyat oldugu ogrenildi. Hastanin fizik muayenesinde sol lomber bol­gede derin palpasyonla ele gelen duzgun sinirli 6x5 cm boyutlarinda agrili kitle palpe edildi. Hastanin ecchino­coccus granulosus indirekt hemaglutinasyon testi pozitifti. Radyolojik incelemelerde, lezyonun kist hidatikle uyumlu oldugu rapor edildi. Hastanin gecirilmis kist hidatik oykusu yoktu. Hastaya spinal anestezi altinda parsiyel kistektomi ve drenaj uygulandi. Kistektomi materyali, aselluler lamel­ler tabaka (kist hidatik) olarak rapor edildi. Postoperatif komplikasyon olmadi. Operasyon sonrasi hastaya 15 mg/kg/gun Albendazol tedavisi 3 ay sureyle verildi. Hastanin 6 aylik izleminde kist hidatit nuksune rastlanmadi. Kist hi­datigin endemik oldugu bolgelerde kas ici yerlesimli kistik kitlelerin ayirici tanisinda kist hidatit de hatirlanmalidir. Ai­lede gecirilmis kist hidatit oykusunun olmasi yol gosterici olabilir. Tedavide kist total cikarilamiyorsa, parsiyel kis­tektomi ve drenaj kas ici kist hidatigin cerrahi tedavisinde secilebilir.

Detection of sarcocystic infection in a wild rodent (Apodemus agrarius chejuensis) captured on Jeju island

Sarcocystis spp is a causative agent of sarcocystosis. They have a characteristic life cycle infecting both prey and predator. Sarcocystis can cause myositis, atrophy of the adjacent cells and abortion in cattle. In mice, sarcocystosis causes mild cellular reactions without clinical disease. Severe haemorrhage and abortion were also reported. For monitoring the disease in wild rodents of the Korean peninsula, we captured Apodemus agrarius chejuensis on Jeju island and examined the specimen histopathologically. Intramuscular cysts were found and diagnosed as Sarcocystis. Sarcocystic infection has been reported in worldwide. There have been many reported infections in cattle and pigs in Korea. To our knowledge, this is the first report of Sarcocystis in Apodemus agrarius chejuensis captured in Korea.

LARGE HYDATID CYST IN THIGH: A RARE CASE WITH CLINICO-RADIO-PATHOLOGICAL PROFILE

We are presenting the case of a 26-year-old female patient who presented with a large swelling in the left thigh anteromedially. She was preoperatively diagnosed as a case of intramuscular hydatid cyst radiologically, and then cyst was removed and pathology proved the diagnosis. This case illustrates that echinococcal disease should be considered in the differential diagnosis of every cystic mass in any anatomic location, especially when they occur in areas where the disease is endemic.

Pathological, Molecular, and Biochemical Characterization of Coenurus gaigeri in Iranian Native Goats

Coenurus gaigeri is the larval stage of Taenia multiceps gaigeri, which infects the muscles of goats and, to a lesser extent, sheep. Metacestodes of the goat such as Coenurus cerebralis, Cysticercus tenuicollis, Cysticercus ovis, and hydatid cysts have been extensively studied. However, because of the uncommon occurrence of C. gaigeri, very few records exist of its biology, pathogenesis, and pathology. Therefore, an investigation was conducted in the summer of 2008 at Shiraz Slaughterhouse, where 2.6% of the goats were infected with intramuscular cysts. Scolices from coenuri were collected for morphologic analysis, and the cysts were identified as C. gaigeri, the intermediate stage of T. multiceps gaigeri. In addition, molecular genetic markers of mitochondrial DNA were applied phylogenetically to resolve the questionable relationship between C. gaigeri and C. cerebralis. All coenuri fluids were aspirated and centrifuged separately; the supernatants were analyzed for biochemical features that included glucose, total protein, urea nitrogen, uric acid, triglycerides, cholesterol, creatinine, calcium, sodium, potassium, alanine aminotransferase, and aspartate aminotransferase. The pathologic changes around the coenuri included mechanical destruction of the affected tissues, associated with degenerative and necrotic changes, infiltration by polymorphonuclear and mononuclear cells, proliferation of fibroblasts, and development of adventitious tissue. Results based on phylogenetic analysis of the mitochondrial DNA (CO1 and ND1) suggest that the larval stages of T. multiceps gaigeri and C. cerebralis, which showed similar morphological criteria, are monophyletic species. However, C. gaigeri interestingly were situated in the biceps femoris, triceps, and abdominal muscles without localization in the nervous system.

Intramuscular synovial cyst of the shoulder: A case report

Intramuscular synovial cyst of the shoulder: A case report

Primary paraspinal intramuscular hydatid cyst: case report

Primary paraspinal intramuscular hydatid cyst: case report

Solitary Hydatid Cyst of the Thigh: A Challenging Diagnosis

A 53-year-old woman presented with an enlarging mass in the medial aspect of her right thigh. Magnetic resonance imaging suggested an intramuscular hydatid cyst. The cyst was surgically excised. Although muscular hydatidinosis is rare, its resemblance to soft tissue tumors warrants careful diagnosis since any invasive diagnostic measures may lead to fatal complications.

Ruptured intramuscular ganglion cyst in the gastrocnemius medialis muscle: Sonographic appearance

We report the case of a 55-year-old woman who presented with a severe pain and a mass in the proximal portion of the medial calf. On sonography, the lesion appeared as a poorly defined hypoechoic lesion with interspersed muscle bundles. A total excision of the lesion was performed. On microscopic examination, the specimen demonstrated cystic lesions surrounded by fibrous walls within the muscle bundles. A ruptured intramuscular ganglion cyst diagnosis was made based on the histopathologic findings.

Case report of a primary multiloculate muscular cystic hydatidosis

Hydatidosis is a zoonosis caused by the ingestion of Echinococcus granulosus eggs, released though the feces, from infected dogs to humans. Primary localization is mostly hepatic and/or pulmonary, whereas muscular involvement is very rare, even more so in muscular striated tissue. This is the report of a case of a primary intramuscular hydatid cyst in a 79-year-old woman who presented with a 3-year history of a painful lump in her proximal medial left thigh. The authors document the exceptional giant dimensions of the cyst, which have not previously been reported in a case of striated muscular hydatid disease.

Use of cadaveric dissection for the exploration of anatomical and pathological structures as the primary learning tool in an undergraduate gross anatomy course: student perspectives

At Westminster College, an undergraduate gross anatomy dissection was performed as part of a human gross anatomy program, with the objective of exploring anatomical and pathological structures in the cadaver. The course of dissection followed the 13th edition of Grant's Dissector and was completed by five undergraduates. The order of dissection led to ever‐evolving hypotheses as to indicated pathologies, as students worked through the scientific method in their dissections. As the dissection proceeded abnormalities were noted. These included, an intramuscular cyst found within the deltoid (length = 4.5 cm, width = 1.5cm), left ventricular wall hypertrophy (1.8 cm), surgical evidence of a shortened colon (by 47cm), and renal abnormalities. As each anatomical variation was dissected, students formed hypotheses and integrated observations from individual systems into an overall evaluation of indicated pathologies. Preliminary observations led to the likelihood of a long‐standing renal infection which may have materialized into xanthogranulomatous pyelonephritis. Students documented their experiences throughout the project.

Clinical Significance of Intramuscular Cysts in the Rotator Cuff and Their Relationship to Full- and Partial-Thickness Rotator Cuff Tears

Secondary signs have been sought to help in the MR diagnosis of rotator cuff tears, especially partial-thickness tears. We sought to determine whether intramuscular cysts are always present with rotator cuff tears and the types of rotator cuff tears with which they present, and to establish the clinical significance of finding intramuscular cysts. Retrospective analysis of our institution's database of 5,101 MRI examinations of the shoulder during an 8-year period resulted in 187 examinations in 185 patients who were thought to have intramuscular cysts. Of the 187 examinations, 134 shoulders in 132 patients (62 women, 70 men) met our criteria for an intramuscular cyst. Of the 134 shoulders with intramuscular cysts, 102 (76.1%) showed imaging findings of both intramuscular cysts and rotator cuff tears. Thirty-two of the 134 (23.9%) shoulders were diagnosed with only an intramuscular cyst and were not associated with a rotator cuff tear. Fifty-five of 102 (53.9%) shoulders consisted of an intramuscular cyst associated with a full-thickness rotator cuff tear, and 47 of 102 (46.1%) shoulders presented with a partial-thickness rotator cuff tear. Forty-eight of 102 (47.1%) shoulders with both an intramuscular cyst and a rotator cuff tear also underwent the reference standard arthroscopy examination to confirm the MRI findings. In 46 of 48 (95.8%) shoulders that underwent arthroscopy, the findings confirmed the imaging evidence; the other two cases were shown to have an intact rotator cuff at arthroscopy. Our study echoes the findings of previous studies that suggest a relationship between intramuscular cysts and full- and partial-thickness rotator cuff tears but illustrates that the incidence of an isolated intramuscular cyst is higher than previously expected. When intramuscular cysts present with rotator cuff tears, they present with full- and partial-thickness rotator cuff tears in relatively equal proportions. The presence of an intramuscular cyst on MRI, although it may be an isolated finding, should prompt a thorough search of all the rotator cuff tendons for tears so that the patient may receive appropriate follow-up.

회전근 개 파열과 동반된 회전근 개 근육 내 낭종 - 증례 보고 -

Periarticular cysts in the shoulder joint are relatively rare. The most common are paralabral cysts, which can cause suprascapular nerve entrapment syndrome. Acromioclavicular juxtaarticular cysts have been described in association with full-thickness rotator cuff tears and a degenerated acromioclavicular joint. Intramuscular cysts of the rotator cuff are a relatively rare and unknown type of periarticular cyst. We report a case of an intramuscular cyst of the rotator cuff that was associated with a tear of the rotator cuff.

Evaluation of ganglion cysts using vastly undersampled isotropic projection reconstruction (VIPR)

For some atypical para-articular ganglia, the presence of a joint connection is highly controversial. The proper preoperative diagnosis and identification of this joint connection for ganglion cysts is important for patient treatment and outcome. MRI is the imaging modality of choice when evaluating such lesions, but the detection of subtle joint connections remains difficult with conventional MR protocols. We investigated the utility of a steady-state free-precession acquisition with isotropic high resolution using the vastly undersampled isotropic projection reconstruction (VIPR) pulse sequence to determine if joint connections for ganglion cysts could be seen more effectively, using the knee region as a model. We evaluated four patients: two with peroneal intraneural ganglion cysts, one with adventitial cystic disease of the popliteal artery, and one patient with a more typical extraneural (intramuscular) cyst. Both conventional MR and VIPR techniques were used. In our clinical experience, we found VIPR to be superior to conventional MR techniques in detecting and depicting joint connections in typical and atypical ganglion cysts around the knee.

Hydatid Cyst in the Biceps and Gluteus Muscles: Case Report

Primary hydatid disease in the muscle is extremely rare. Usually, intramuscular hydatid cysts are secondary, resulting either from the spread of cysts spontaneously or after operations for hydatidosis in distant regions. Report of two unusual cases of primary hydatid cysts in the gluteus and biceps brachii muscles, behaving as enlarging soft-tissue tumors, with review of the pertinent English-language literature. Magnetic resonance imaging and ultrasound examinations revealed an intramuscular cyst in the anterior aspect of one patient's biceps brachii and the other patient's gluteus maximus muscle; and no cyst existed in any other location. The cysts were excised totally, and the diagnosis of muscular hydatidosis was confirmed by histopathologic examination. In followup of two years after the operation, there has been no recurrence in either patient. In geographic regions where hydatidosis is endemic, hydatid cyst should be included in the differential diagnosis of a cystic mass in the muscle to avoid fine-needle biopsy and the consequences of spillage of cyst contents.

PRIMER HYDATID CYST IN PARAVERTEBRAL MUSCLE

Hydatid cysts may occur in any area of the body, but usually localize to the liver and the lungs. Primary localization in muscle isn’t common, accounting for 2-3 % of all sites. We presented a patient with hydatid cyst, diagnosed by ultrasonography and computed tomography, and the cyst was located in the paravertebral muscle of the patient. Surgical and medical treatment combination.The intact intramuscular cyst was completely excised. Postoperatively, the patient began receiving albendazol 400 mg twice daily, for 6 months. At two years postoperatively, a clinical and radiological examination yielded no evidence of recurrence.