자기공명영상상 자궁내막성 낭종과 출혈성 낭종의 감별

이호원 대한영상의학회 1998 대한영상의학회지 Vol.38 No.6

Purpose : To differentiate endometrial cysts from hemorrhagic cysts on the basis of MR findings Materials andMethods : The MR findings of twelve patients with endometrial cysts(15 cases) and of nine patients withhemorrhagic cyst(12 cases) were retrospectively evaluated. Fourteen patients were surgically corfirmed and sevenwith hemorrhagic cysts were clinically diagnosed by resolution of the cysts during ultrasound follow up. Sixteenpatients underwent MR imaging using a 1.5T system(Magnetom Vision, Siemens, Germany), and for five patients a 2.0Tsystem(Spectro 2000, Goldstar, Korea) was used. MR images were retrospectively evaluated with respect to size andsignal intensity of the cyst, uni/multilocularity, shading, the hematocrit effect, clot.., fluid-fluid level andseptum, and thickness, signal intensity and enhancement of the cyst wall. Result : Eleven(73.3%) endometrial cystswere multilocular, but all hemorrhagic cysts were unilocular. The signal was hyperintense on both T1WI and T2WI inten(66.7%) endometrial cysts and seven(58.3%) hemorrhagic cysts. Shading was found in five(33.3%) and one(8.3%),respectively; the hematocrit effect in two(13.3%) and five(41.7%) respectively, clot in two of each type(13.3%,16.7%), and fluid-fluid level in only one hemorrhagic cyst. Septum was found only in endometrial cysts(five cases,33.3%); its signal intensity on both T1WI and T2WI was low, and on Gd-enhanced images was not enhanced. The cystwall was thick in five of each type(33.3%, 41.7%); its signal intensity was low on both T1WI and T2WI, and notenhanced on Gd-enhanced images. In eight hemorrhagic cysts, however, the cyst wall was iso to high in signalintensity on both T1WI & T2WI, and was enhanced on Gd-enhanced images. The prevalence of uni/ multilocularity,septum, and signal intensity and the presence of enhancement of the cyst wall were significantly different betweenthe two groups(p< 0.005). Conclusion : Uni/ multilocularity, septum, and signal intensity and enhancement of thecyst wall were useful for the differentiation of endometrial from hemorrhagic cysts. Signal intensity of the cyst,shading, the hematocrit effect and clot were not helpful.

도축우 유래 난소낭종의 감별진단 및 치료제 선택

박상국 ( Sang Guk Park ),최동식 ( DONG SIK CHOI ),박장일 ( Jang Il Park ),정대영 ( Dae Young Jeoung ) 한국가축위생학회 2000 韓國家畜衛生學會誌 Vol.23 No.2

To establish the differential diagnosis and treatment method in bovine ovarian cysts, specially ovarian cysts with corpus luteum, serum progesterone (P4) concentration and ultrasonography for measuring the cystic wall thickness and diameter of cyst and corpus luteum were investigated from slaughtered cows with ovarian cysts. Ovarian cysts were classified 8 types by the number of cyst, cystic wall thickness and present of corpus luteum. Ovarian cysts with corpus luteum were 11(13.6%) of 81 cows and ovarian cysts without corpus luteum were 70 (86.4%) cows. The incidence rates of 8 various types of ovarian cysts were as follows; 2Ba 33.3%, 2Aa 25.9% and 2Bb 14.8%, respectively. The incidence rates of ovarian cysts without corpus luteum were follicular cyst 59.2% and luteal cyst 27.2%. The cystic wall thickness were 2Ab 3.7mm and 2Bb 3.5uun, and the serum P4 concentrations were above 2.0 ng/ia in lAa, lAb, iBa, 2Ab and 2Bb. respectively. In ovarian cysts with corpus luteum, the correlation coefficients between corpus luteum area and serum P4 concentration were 0.45. In ovarian cysts without corpus luteum, there was significantly positive correlations between cystic wall thickness and serum P4 concentration(r2 = 0.54, p<O.Ol). These results indicate that PGF2 a analogues can be choice for treatment of ovarian cysts with corpus luteum and above 3mm the cystic wall thickness because serum P4 concentrations were above 2.0 ng/`n€ in ovarian cysts with corpus luteum and thickened cystic wall. In conclusion, it is suggested that ultrasonography is useful diagnostic tool for diagnosis and selection of treatment remedy in cystic ovaries of bovine.

도축한우에서 난소낭종의 감별진단 및 기능성에 관한 연구

이청산 ( Chung San Lee ),류대열 ( Dae Yeol Rhu ),윤호규 ( Ho Kyu Yun ),송종한 ( Jong Han Song ),이종인 ( Jong In Lee ),서국현 ( Guk Hyun Suh ),김일화 ( Ill Wha Kim ),강현구 ( Hyun Gu Kang ) 한국가축위생학회 2004 韓國家畜衛生學會誌 Vol.27 No.1

To establish the differential diagnosis and functional status in ovarian cystic cows, progesterone(P4) and estrogen(E2) level of cystic follicular fluid, ultrasonography for measuring the cystic diameter and thickness of cystic wall, and histological findings were investigated in cystic ovaries from slaughtered Korean native cows. Ovarian follicles were classified as systic if the diameter was greater than 25 mm by ultrasonography. Ovarian cysts < 3 mm of cystic wall thickness, < 10 ng/ml P4 concentration and >10 ng/ml E2 concentration were classified follicular cyst, ovarian cysts > 3 olin of cystic wall thickness, 10 ng/ml P4 concentration and <10 ng/ml E2 concentration non-functional ovarian cyst, respectively. Also ovarian cysts were classified 8 types by anatomical and hisctological findings. Ovarian cysts with corpus luteum were 3 of 73 cows and ovarian cysts without corpus luteum were 70 cows. The incidence rates of 8 various types of ovarian cysts were as follows; 2Aa 56.2%, 2Ba 20.5% and 2Ab 15.1%, respectively. The incidence rates of ovarian cysts without corpus luteum were follicular cyst 76.7% and luteal cyst 19.2%. The thickness of cystic wall were lAb 3.9 mm, 2Ab 3.3 mm and 2Bb 3.2 mm, and the cystic fluid P4 concentrations were above 10.0 ng/ml in lAb, 2Ab and 2Bb, respectively. There was significantly correlations between the thickness of cystic wall and cystic fluid P4 concentration in ovarian cysts(p<0.05). The ovarian cyst was classified follicular cysts, luteal cyst and non-functional ovarian cyst by hormone analysis. The luteal cyst was accuratly dignosed by cystic wall thickness. But follicular cysts was misdiagnosed 13 cows of 56 cystic cows. The 13 cystic cows was determined as had non-fuctional ovarian cysts. The cystic fluid P4 concentration was 3.3 ng/ml in follicular ovarian cysts and 30.1 ng/ml luteinized ovarian cysts. There was significantly positive correlations between thickness of cystic wall and serum P4 concentration in follicular(r2 = 0,59, p<0.001) and luteal cysts(r2 = 0.65, p<0.001). These results indicated that ovarian cysts had various stages of degeneration and luteal cyst was accuratly diagnosed measurement of cystic wall thickness by ultrasonography, but follicular cysts was not diagnosed only cystic diameter and cystic wall thickness. In conclusion, it is suggest that ovarian cysts was diagnosed by combination of clinical sign and anatomical cystic features.

성인에서 흉곽입구의 기관주위 공기낭: CT소견

김영통,배원경,김일영 대한영상의학회 2005 대한영상의학회지 Vol.52 No.2

Purpose: To evaluate the frequency of a paratracheal cyst on CT in an adult, and to compare the degree of loculation and the patient's age with the longest diameter of the air cysts. Materials and Methods: Of 1520 patients, who underwent a CT scan, 41 patients with paratracheal cysts were enrolled in this study. There were 26-males and 15 females, whose ranged from 24 to 82 years (mean, 59.8). The CT findings were evaluated to determine the relationship between the degree of loculation and the longest diameter of the air cysts. Another tracheal diverticula or an air cyst, as well as the tracheal communication were also evaluated. Results: The longest diameter of the paratracheal air cysts was < 1 cm (n=20), 1-2 cm (n=15), 2-3 cm (n=4), 3-4 cm (n=1) and 4-5 cm (n=1). Most of the patients under 60 years of age had air cysts < 1 cm, and most patients over 60 had air cyst > 1 cm (p=0.043). The paratracheal air cysts < 1 cm were unilocular or bilocular in shape, the 1-2 cm sized air cysts were bilocular or multilocular, and the air cysts > 2 cm were multilocular. Four patients had another small tracheal diverticula, and one patient had another small paratracheal air cyst. Tracheal communication was observed in 7 patients (17%). Conclusion: The frequency of paratracheal air cysts in adults undergoing a CT scan was 2.7%. The longest diameter of the paratracheal air cysts was associated with the patient's age. The shape of air cysts became more multilocular as the longest diameter of the paratracheal air cysts increased. Another small tracheal diverticula or air cysts were observed in 12% of patients. 목적: 성인에서 CT에서의 기관주위 공기낭의 빈도를 알아보고 공기낭의 장경에 따른 소방형성 정도와 환자의 나이를 알아보고자 하였다. 대상과 방법: 흉부CT를 시행한 환자 1520명중 기관주위 공기낭을 보인 41명을 대상으로 하였다. 남자가 26명, 여자가 15명이었고 나이는 24-82세(평균연령:59.8)였다. CT소견은 기관주위 공기낭의 장경에 따른 소방형성의 정도를 알아보았다. 그리고 다른 부위에 기관 게실 혹은 공기낭, 기관과의 연결을 알아보았다. 결과: 기관주위 공기낭의 장경이 1 cm미만이 20명, 1-2 cm이 15명, 2-3 cm이 4명, 3-4 cm이 1명, 4-5 cm이 1명이었다. 환자의 나이가 60세이하에서는 1 cm이하가 많고, 60세이상은 1 cm이상이 많았다(p=0.043). 기관주위 공기낭의 소방형태는 장경이 l cm이하는 단방형, 1-2 cm에서 이방형 혹은 다방형, 2 cm이상에서는 다방형이었다. 4명에서 다른 부위에 1개 이상의 기관 게실이 있었고 1명은 또 하나의 작은 기관주위 공기낭이 있었다. 기관와의 연결은 7명(17%)에서 볼 수 있었다. 결론: 기관주위 공기낭은 CT를 시행한 성인 환자의 약 2.7%에서 보였다. 환자의 나이가 많을수록 공기낭의 장경이 컸다. 기관주위 공기낭의 장경이 커질수록 다방형이었다. 환자의 12%에서 다른 부위에 기관게실과 공기낭을 보였다.

CT Imaging Findings of Ruptured Ovarian Endometriotic Cysts: Emphasis on the Differential Diagnosis with Ruptured Ovarian Functional Cysts

이영래 대한영상의학회 2011 Korean Journal of Radiology Vol.12 No.1

Objective: The purpose of this study is to assess the prevalence of abnormal CT fi ndings in patients with surgically proven ruptured endometriotic cysts, as compared with those abnormal CT fi ndings of ruptured ovarian functional cysts. Materials and Methods: This study included 13 retrospectively identified patients with surgically confirmed ruptured ovarian endometriotic cysts and who had also undergone preoperative CT scanning during the previous seven years. As a comparative group, 25 cases of surgically confi rmed ruptured ovarian functional cysts were included. We assessed the morphologic features of the cysts and the ancillary fi ndings based on CT. Results: For the endometriotic cysts, the mean maximum cyst diameter was signifi cantly larger than that of the functional cysts (70.1 mm versus 36.4 mm, respectively, p < 0.05). The endometriotic cysts frequently had a multilocular shape and a thicker cyst wall, as compared to that of functional cysts, and these differences were statistically signifi cant. Among the ancillary fi ndings, endometriotic cysts showed a signifi cantly higher prevalence of loculated ascites, ascites confi ned to the pelvic cavity without extension to the upper abdomen, and peritoneal strandings and infi ltrations (p < 0.05). Although 11 of the 25 cases of functional cysts showed active extravasation of contrast material at the ovarian bleeding site, only one of 13 cases of endometriotic cysts showed active extravasation. Conclusion: The diagnosis of ruptured endometriotic cyst should be suspected for a woman in whom CT reveals the presence of multilocular or bilateral ovarian cysts with a thick wall and loculated ascites confi ned to the pelvic cavity with pelvic fat infiltrations. Objective: The purpose of this study is to assess the prevalence of abnormal CT fi ndings in patients with surgically proven ruptured endometriotic cysts, as compared with those abnormal CT fi ndings of ruptured ovarian functional cysts. Materials and Methods: This study included 13 retrospectively identified patients with surgically confirmed ruptured ovarian endometriotic cysts and who had also undergone preoperative CT scanning during the previous seven years. As a comparative group, 25 cases of surgically confi rmed ruptured ovarian functional cysts were included. We assessed the morphologic features of the cysts and the ancillary fi ndings based on CT. Results: For the endometriotic cysts, the mean maximum cyst diameter was signifi cantly larger than that of the functional cysts (70.1 mm versus 36.4 mm, respectively, p < 0.05). The endometriotic cysts frequently had a multilocular shape and a thicker cyst wall, as compared to that of functional cysts, and these differences were statistically signifi cant. Among the ancillary fi ndings, endometriotic cysts showed a signifi cantly higher prevalence of loculated ascites, ascites confi ned to the pelvic cavity without extension to the upper abdomen, and peritoneal strandings and infi ltrations (p < 0.05). Although 11 of the 25 cases of functional cysts showed active extravasation of contrast material at the ovarian bleeding site, only one of 13 cases of endometriotic cysts showed active extravasation. Conclusion: The diagnosis of ruptured endometriotic cyst should be suspected for a woman in whom CT reveals the presence of multilocular or bilateral ovarian cysts with a thick wall and loculated ascites confi ned to the pelvic cavity with pelvic fat infiltrations.

초음파검사 및 호르몬검사에 의한 젖소 번식검진과 발정유도 II. 황체가 존재하는 난소낭종의 진단과 치료

오기석,박상국,김방실,고진성,신종봉,백종환,홍기강,문광식,임원호 한국임상수의학회 2003 한국임상수의학회지 Vol.20 No.3

To establish the differential diagnosis and treatment method in bovine ovarian cysts, specially ovarian cysts with corpus luteum, serum progesterone concentration, rectal palpation and ultrasonography for measuring the cystic wall thickness and diameter of cyst and corpus luteum were investigated from 1,188 dairy cows with ovarian cysts. The plasma progesterone concentrations were 0.3$\pm$0.4 (mean$\pm$SD) ng/ml in 629 cows with follicular cysts, 3.7$\pm$1.1 ng/ml in 431 cows with luteal cysts, and 3.8$\pm$1.2 ng/ml in 128 cows with coexist of ovarian cysts and corpus luteum, respectively. The cystic wall thickness by ultrasonography were 1.6$\pm$0.4 mm in 629 cows with follicular cysts, 4.2$\pm$1.5 mm in 431 cows with luteal cysts, and 1.6$\pm$0.6 mm in 128 cows with coexist of ovarian cysts and corpus luteum, respectively. The days from initial treatment to insemination in follicular cysts were 28.1$\pm$6.9 days in treatment of GnRH alone, 15.9$\pm$2.9 days in combination of GnRH and dinoprost, and 15.1$\pm$3.1 days in combination of GnRH and cloprostenol. The percentages of cows conceived within 100 days after initial treatment were 61 %, 68% and 73% in treatment of GnRH alone, combination of GnRH and dinoprost, and combination of GnRH and cloprostenol, respectively. The days from initial treatment to insemination in luteal cysts were 3.8$\pm$0.6 days in treatment of dinoprost alone and 3.8$\pm$0.7 in cloprostenol alone. The percentages of cows conceived within 100 days after initial treatment were 69.5% and 68.5% in treatment of dinoprost and cloprostenol, respectively. The days from initial treatment to insemination in coexist of cysts and corpus luteum were 3.7$\pm$0.7 days in treatment of dinoprost alone and 3.8$\pm$0.6 in cloprostenol alone. The percentages of cows conceived within 100 days after initial treatment were 87% and 84% in treatment of dinoprost and cloprostenol, respectively. These results suggest that the best choice for treatment agents in ovarian cysts were combination of GnRH and PGF$_2$$\alpha$ in follicular cysts, and the PGF$_2$$\alpha$ in luteal cysts and in coexist of cysts and corpus luteum, respectively. In conclusion, it is suggest that ultrasonography is useful diagnostic tool for diagnosis and selection of treatment remedy in cystic ovaries of bovine.

낭종의 위치에 따른 복강경 신낭종조대술 결과 비교: 말초형과 신우주위형 낭종

최승화,서일영,임정식 대한비뇨의학회 2008 Investigative and Clinical Urology Vol.49 No.6

Purpose: The location of renal cysts is related with the symptoms and signs. Parapelvic cysts are a rare form of simple renal cysts, and they are much more commonly associated with the symptoms of obstruction, pain, infection and stone formation. We evaluated the surgical outcomes of laparoscopic renal cyst marsupialization for treating the peripheral and parapelvic types of renal cysts. Materials and Methods: Between November 1993 and April 2007, 87 patients(91 cases) who presented with symptomatic renal cysts underwent laparoscopic renal cyst marsupialization. There were 76 cases in the peripheral cyst group and 15 cases in the parapelvic cyst group. The mean age was 59.2 years(age range: 20-77) for the patients with peripheral renal cysts and 62.9 years(age range: 47-79) for the patients with parapelvic cysts. Results: The mean operative time was 108 minutes(30-280) for the patients with peripheral renal cysts and 144 minutes(80-270) for the patients with parapelvic cysts, and there was a significant difference(p=0.031). However for the other factors, including the time for the first oral intake, the time to remove the drain and the length of the hospital stay, there were no significant differences(p=0.671, 0.088, 0.268, respectively). Complications, including bleeding and leakage, were detected in 11 patients(14.4%) of the peripheral cyst group and in 4 patients(26.6%) of the parapelvic cyst group; there was a statistical difference(p=0.035). Both groups had a high success rate, 98.7% in the peripheral cyst group and 100% in the parapelvic cyst group. Conclusions: We found that laparoscopic renal cyst marsupialization was a standard treatment with a high success rate and a fast recovery time. However, performing this for parapelvic cysts showed a longer operative time and a higher complication rate as compared with peripheral cysts. (Korean J Urol 2008;49:497-501) Purpose: The location of renal cysts is related with the symptoms and signs. Parapelvic cysts are a rare form of simple renal cysts, and they are much more commonly associated with the symptoms of obstruction, pain, infection and stone formation. We evaluated the surgical outcomes of laparoscopic renal cyst marsupialization for treating the peripheral and parapelvic types of renal cysts. Materials and Methods: Between November 1993 and April 2007, 87 patients(91 cases) who presented with symptomatic renal cysts underwent laparoscopic renal cyst marsupialization. There were 76 cases in the peripheral cyst group and 15 cases in the parapelvic cyst group. The mean age was 59.2 years(age range: 20-77) for the patients with peripheral renal cysts and 62.9 years(age range: 47-79) for the patients with parapelvic cysts. Results: The mean operative time was 108 minutes(30-280) for the patients with peripheral renal cysts and 144 minutes(80-270) for the patients with parapelvic cysts, and there was a significant difference(p=0.031). However for the other factors, including the time for the first oral intake, the time to remove the drain and the length of the hospital stay, there were no significant differences(p=0.671, 0.088, 0.268, respectively). Complications, including bleeding and leakage, were detected in 11 patients(14.4%) of the peripheral cyst group and in 4 patients(26.6%) of the parapelvic cyst group; there was a statistical difference(p=0.035). Both groups had a high success rate, 98.7% in the peripheral cyst group and 100% in the parapelvic cyst group. Conclusions: We found that laparoscopic renal cyst marsupialization was a standard treatment with a high success rate and a fast recovery time. However, performing this for parapelvic cysts showed a longer operative time and a higher complication rate as compared with peripheral cysts. (Korean J Urol 2008;49:497-501)

반월상연골낭의 자기공명영상소견

이혜원 대한영상의학회 1995 대한영상의학회지 Vol.32 No.4

Purpose: To characterize MR findings of meniscal cysts of the knee. Materials and Methods: We retrospectivelyreviewed knee MR images of surgically confirmed eighteen meniscal cysts. The location and shape of meniscal cystswere evaluated. Results: Six of 18 cases were medial meniscal cysts and 12 of 18 cases were lateral meniscalcysts. Horizental tears were present in all cases(100%). Four of 18 cases had rounded cysts and 14 of 18 cases hadelongated cysts. In 3 of 6 medial meniscal cysts, cysts had dissected into the soft tissues distant from themeniscus, and connecting stalks were visualized. Three of 6 medial meniscal cysts were located adjacent to ameniscal tear. All of the lateral meniscal cysts occured immediately adjacent to the meniscal tear. Conclusion:Meniscal cysts are associated with horizental meniscal tear. The shape of meniscal cysts tend to be elongatedrather than rounded. Medial meniscal cysts occured distant from or adjacent to the meniscal tear according tolocation of the tear. Lateral meniscal cysts occured adjacent to the meniscal tear

소아 청소년 환자에서 발생한 269개의 구강 악안면 영역 낭 : 10년간의 후향적 임상 연구

홍혜린,남옥형,김미선,최성철,이효설 大韓小兒齒科學會 2016 大韓小兒齒科學會誌 Vol.43 No.3

This study aimed to identify the characteristics of jaw cysts among children and adolescents treated at the Kyung Hee University Dental Hospital from 2005 to 2015. A retrospective observational study was conducted of 269 jaw cysts diagnosed in 253 patients. The following variables were recorded: gender, age, prevalence and location of lesions, clinical symptoms and treatment. Statistical analyses were performed using the SPSS (version 20.0). Our results suggest that the cysts are slightly more prevalent in males. Cystic lesions of the jaws in children are predominantly odontogenic and developmental in origin. Dentigerous cysts predominate in developmental cysts and the most frequent diagnosis is radicular cysts in inflammation cysts. The most common location of the cysts is in the mandible, particularly the lower molar region. In numerous cases, the patients have no clinical symptoms. Most cysts were surgically enucleated with tooth extraction. Furthermore, our findings demonstrate that the characteristics of jaw cysts in children are distinctive and differ in several respects from the corresponding distribution of jaw cysts in adult population. Therefore, knowledge of the clinical, radiological and histopathological behavior of jaw cysts and periodic radiographic examination are key factors for early diagnosis and adequate treatment of jaw cysts in children. 낭은 액체 또는 반유동성 액체를 함유하는 상피세포층으로 둘러싸인 공동이다. 낭은 모든 연령대에서 진단될 수 있으나, 소아 청소년 환자는 성인들과 다른 병소의 종류와 양상을 보일 수 있으며, 후속 영구치가 발육 중이므로 치료법도 다를 수 있다. 본 연구는 2005년 1월부터 2015년 3월까지 최근 10년간 경희대학교 치과병원을 내원한 19세까지의 소아 청소년환자 중임상적, 방사선학적 및 조직학적으로 낭으로 확진된 253명의 환자들을 분석하였다. 그 결과 낭은 남아 142명(56.1%)에서다소 많았으며, 치성낭이 209개(82.6%)로 대다수를 차지하였고, 전체적으로 발육성 낭이 염증성 낭보다 많았다. 발육성 낭에서는 함치성낭, 염증성 낭은 치근낭이 많았다. 한편 하악 구치부에서 발생 비율이 높았다. 환자들 중 많은 경우 임상 증상이 없었으며, 낭의 치료 방법으로는 적출술만을 시행하고 원인치 발거를 동시에 진행한 경우가 많았다.

천막상부 낭성병변의 자기공명영상소견

김영주 대한영상의학회 1997 대한영상의학회지 Vol.36 No.1

Purpose: To describe MR findings and differential points of supratentorial cystic intracranial lesions. Materials and Methods: We retrospectively reviewed and analyzed the MR findings of 59 patients with supratentorial cystic intracranial lesions, and classified them as follows: tumor-associated cyst, infectious cyst, ex-vacuo type cyst, and congenital/developmental cyst. Results: Among 59 patients, 47 tumor-associated cysts were seen in 17, 42 infectious cysts in 13, 17 ex-vacuo type cysts in 10, and 19 congenital/developmental cysts in 19. In 44 of 47 tumor-associated cysts, increased or inhomogeneous internal signal intensity was seen on T1-weighted image, 37 of 47 showed thick uneven walls; 37 of 47 had enhancing solid components and there was variable perifocal edema and mass effect. Infectious cysts were multiple (11 of 13). In cases of brain abscess, increased internal signal intensity on T1-weighted image, low signal intensity of abscess wall on T2-weighted image, thick even enhancing wall, and marked perifocal edema(4 of 4) were seen in all four cases. Cysts in cysticercosis were variable in appearance depending on the stage, but were smaller than other cystic lesions. Ex vacuo type cysts were of uniform CSF singnal intensity in all pulse sequences and there was no identifiable wall or enhancement associated with enlarged adjacent ventricle and encephalomalacia(17 of 17). Congenital/developmental cysts showed a single lesion(19 of 19), s signal intensity similar to CSF in all pulse sequences(15 of 19), no identifiable wall(16 of 19), no enhancement(17 of 19), and no perifocal edema(19 of 19). Conclusion: MR was used to categorize supratentorial cystic intracranial lesions into four groups on the basis on their number, size, internal homogeneity of signal intensity on T1-weighted image, enhancing pattern, perifocal edema and mass effect, thereby improving diagnostic specificity and patient management.