ABSTRACT
Cystic lymphangioma is uncommon angiomatous tumor that mainly occurs in the neck. Less than 1% of these tumors affect the mesentery, retroperitoneum and greater omentum. In particular, the cystic lymphangioma involving the mesentery and the retroperitoneum is a rare lesion. We report here on an uncommon case of cystic lymphangioma that presented as a multilocular mass involving the mesentery and the retroperitoneum, and we also present a brief review of the relevant literature.
Subject(s)
Lymphangioma , Lymphangioma, Cystic , Mesentery , Neck , OmentumABSTRACT
Inflammatory myofibroblastic tumor is a rare benign condition of unknown etiology, and may simulate malignancy. Histologically, it is composed of myofibroblasts, plasma cells and histiocytes, and is found in the lung, liver, orbit, skin, mesentery, retroperitoneum and maxillary sinus. We report a case of postoperative recurrent inflammatory myofibroblastic tumor of the retroperitoneum, occurring in a 45-year old man who complained of a palpable abdominal mass.
Subject(s)
Humans , Middle Aged , Histiocytes , Liver , Lung , Maxillary Sinus , Mesentery , Myofibroblasts , Orbit , Plasma Cells , SkinABSTRACT
Malignant transformation of mature cystic teratoma is rare and the vast majority are squamous cell carcinoma, but neuroblastomas are extremely rare. We report a case of neuroblastoma arising in a mature cystic teratoma of the retroperitoneum. In a 24-year-old woman with intermittent abdominal pain, sonogram and CT scan show a multiloculated cystic mass with calcification, fat, septum, and small solid component in the left retroperitoneal space. Complete surgical resection of the cystic mass was done and a small neuroblastoma in the septum of the cystic mass was incidentally detected at histopathologic examination.
Subject(s)
Female , Humans , Young Adult , Abdominal Pain , Carcinoma, Squamous Cell , Neuroblastoma , Retroperitoneal Space , Teratoma , Tomography, X-Ray ComputedABSTRACT
Endodermal sinus tumors are an uncommon malignancy in children and occur most often in the gonads and sacrococcygeal region. In these locations, thy are found as primary tumors ; in teratoma they form part of the malignant component. We present CT and MR imaging findings in two cases of endodermal sinus tumor occurring after the resection of a mature benign cystic sacrococcygeal teratoma during the neonatal period. Awareness of the transformation of a benign cystic teratoma to a different type of malignant germ cell tumor may be helpful in the evaluation of sacrococcygeal masses.
Subject(s)
Child , Humans , Endoderm , Endodermal Sinus Tumor , Gonads , Magnetic Resonance Imaging , Neoplasms, Germ Cell and Embryonal , Sacrococcygeal Region , TeratomaABSTRACT
Endodermal sinus tumors are an uncommon malignancy in children and occur most often in the gonads and sacrococcygeal region. In these locations, thy are found as primary tumors ; in teratoma they form part of the malignant component. We present CT and MR imaging findings in two cases of endodermal sinus tumor occurring after the resection of a mature benign cystic sacrococcygeal teratoma during the neonatal period. Awareness of the transformation of a benign cystic teratoma to a different type of malignant germ cell tumor may be helpful in the evaluation of sacrococcygeal masses.
Subject(s)
Child , Humans , Endoderm , Endodermal Sinus Tumor , Gonads , Magnetic Resonance Imaging , Neoplasms, Germ Cell and Embryonal , Sacrococcygeal Region , TeratomaABSTRACT
Extrarenal Wilms' tumor is a very rare disease, and usually occurs in pediatric patients. We present a case of extrarenal retroperitoneal Wilms' tumor in a six-year old girl with a six-month history of a palpable left abdominal mass. The ultrasonographic and CT features of this tumor showed a well-defined, large, inhomogeneous, predominantly solid mass which was separate from the left kidney. Surgical pathology confirmed this to be an extrarenal Wilms' tumor.