Female ; Humans ; Leiomyoma ; etiology ; pathology ; Uterine Neoplasms ; etiology ; pathology

A glomus tumor of the stomach is a rare submucosal lesion that was first described by De Busscher in 1948. Submucosal tumors of the stomach are mostly leiomyoma, leiomyosarcoma, and malignant lymphoma. It is difficult to diagnose this kind of tumor preoperatively. We present a patient with a gastric glomus tumor which showed the characteristic endoscopic ultrasonographic (EUS) finding. Our case was also diagnosed by pathology after surgery. The major EUS findings in the present case are circumscribed low echoic mass in the forth submucosal layer and an internal heterogenous echo mixed with high echoic spots. The EUS seems to be useful in distinguishing between glomus tumor and other submucosal tumors.
Endosonography* ; Glomus Tumor* ; Humans ; Leiomyoma ; Leiomyosarcoma ; Lymphoma ; Pathology ; Stomach*

We report a case of lipoleiomyoma which arose in retroperitoneum and presented with progressively distended abdomen in a 56-yr-old woman. The tumor was well encapsulated and consisted of two components, benign smooth muscle cells and mature adipose tissue without any atypia. It is likely to be mistaken as extrarenal angiomyolipoma, well-differentiated liposarcoma and leiomyoma with fatty change. We review the histologic characteristics of previously reported myolipoma and describe essential points of differential diagnosis.
Angiomyolipoma/*pathology ; Diagnosis, Differential ; Female ; Human ; Leiomyoma/*pathology ; Liposarcoma/pathology ; Middle Age ; Retroperitoneal Neoplasms/*pathology

Scrotal leiomyomas with atypical bizarre nuclei are rare, which might be misdiagnosed as malignant tumor. We describe a case of scrotal bizarre leiomyoma in a 65-yr-old man. The tumor was a 1 cm-sized, well circumscribed, oval mass arising from the tunica dartos muscle. Histologically, it was formed by whorling bundles of fusiform cells with occasional atypical, pleomorphic nuclei and pseudoinclusions. Mitosis was not found. Although morphologically atypical, scrotal bizarre leiomyomas take on a biologic behavior not different from that of conventional leiomyoma, they should be distinguished from leiomyosarcoma to avoid unnecessary treatment.
Aged ; Genital Neoplasms, Male/*pathology/surgery ; Human ; Leiomyoma/*pathology/surgery ; Male ; Scrotum/*pathology

Colonic inflammatory fibroid polyp (IFP) is an uncommon benign polypoid lesion, which is composed of fibroblasts, numerous small vessels and edematous connective tissue with marked eosinophilic inflammatory cell infiltration. This condition is frequently detected in the stomach and small intestine, but uncommon in the colon. Although IFP is a benign lesion, surgical resections are performed in most colonic cases because the polyps are usually too large to resect endoscopically. Only three patients underwent endoscopic polypectomy in our literature reviews. Here, we present a case of IFP in the descending colon successful endoscopically resected using a novel technique of trapping its stalk with an endoloop, forming the stalk into an omega shape, and then dissecting the stalk with a needle knife.
Adult ; Colectomy ; Colonic Polyps/*pathology/*surgery ; Colonoscopy/*methods ; Female ; Humans ; Leiomyoma/pathology/*surgery

Leiomyomas, originating in the bile duct, are very rare, and only few cases have been reported in the literature. We experienced a case of leiomyoma of the distal common bile duct, mimicking bile duct cancer. A 39-year-old woman presented with intermittent jaundice and general weakness for three months. Clinical profiles showed obstructive jaundice, and the abdominal computed tomography and cholangiography revealed diffuse bile duct dilatation with distal common bile duct stricture. A pylorus-preserving pancreaticoduodenectomy was performed and the pathologic specimen disclosed leiomyoma of the common bile duct accompanying severe fibrosis. This is the first case of leiomyoma in the bile duct reported in Korea.
Adult ; Common Bile Duct Neoplasms/*diagnosis/pathology/surgery ; Female ; Humans ; Leiomyoma/*diagnosis/pathology/surgery ; Pancreaticoduodenectomy

OBJECTIVETo investigate the feature of histomorphology and biology of uterine bizarre leiomyoma from the clinical, pathological features as well as the immunohistochemical expression.

METHODSTotally 25 cases of leiomyomas were studied. Among them, immuno-histochemical staining (SP and ABC methods) for smooth muscle actin (SMA), proliferative cell nucleus antigen (PCNA), estrogen receptors (ER), and progesterone receptors (PR) were performed in 20 cases. The clinical features and follow-up records were analyzed.

RESULTSThe main clinical findings were irregular vaginal bleeding, pain and pelvic tumor. One case was with immense amount of ascitis and the other two were with pregnancy. All the cases had no history of taking pregestine. Light microscopy showed that part of all the cell nuclei were bizarre, accompanying with double or multiple nuclei in which rather big and reddish staining inclusion bodies were obtained (D = 7 - 26 micro m), and the mitotic figures were 0 - 2/10 HPF. Among 20 cases with immunohistochemical staining, markers indicating muscle cells in origin were positive in the bizarre cells, 15 of which (75%) with negative or weak positive PCNA, and 18 of which (90%) with negative ER. There were significant difference between the studied and control groups (P = 0.027, P < 0.005 respectively) and in addition, PR was positive in both these two groups. A majority of the nucleus inclusion bodies was SMA positive. Follow-up records demonstrated so far no recurrence cases obtained.

CONCLUSIONSUterine atypical leiomyoma belongs to benign tumor, although its shape is bizarre. In this group, the morphology changes are correlated with pregnancy, but not with pregestine. The expression of immunohistochemistry shows certain features, and is important to identify uterine bizarre leiomyoma with leiomyosarcoma and STUMP in pathological diagnosis.

Adult ; Female ; Humans ; Immunohistochemistry ; Leiomyoma ; metabolism ; pathology ; Middle Aged ; Pregnancy ; Uterine Neoplasms ; metabolism ; pathology

Aged ; Calcinosis ; Diagnosis, Differential ; Female ; Humans ; Leiomyoma ; diagnostic imaging ; pathology ; Radiography ; Uterine Neoplasms ; diagnostic imaging ; pathology

Humans ; Leiomyoma ; pathology ; Microtomy ; methods ; Microwaves ; Paraffin Embedding ; methods ; Specimen Handling ; methods ; Thyroid Neoplasms ; pathology

Smooth muscle tumor of the uveal tract is rare, and mostly located in the ciliochoroidal area. We report a unique case of posterior choroidal leiomyoma in a 27-yr-old man. Ophthalmoscopic examination disclosed an 11 mm-sized mass on the fundus two-disc diameters apart from the optic disc. With a suspicion of amelanotic melanoma, the globe was enucleated. The mass occupied the whole thickness of choroidal stroma beneath the pigmented retinal epithelium and composed of spindle cells arranged in intersecting fascicles. Immunohistochemical studies demonstrated immunoreactivities of the tumor cells for smooth muscle actin, desmin, and vimentin. Ultrastructurally, numerous intracytoplasmic filaments with fusiform focal densities, scattered segmental external laminae, subplasmalemmal densities, and pinocytic vesicles were noted. The leiomyoma in this case had several unusual features in that it was confined to the posterior choroid with no relation to the ciliary body, occupied the whole stroma of the choroid instead of suprauveal location, and occurred in a young male. It is important to include choroidal leiomyoma in the differential diagnosis of choroidal tumors.
Actins/analysis ; Adult ; Choroid Neoplasms/chemistry/*pathology ; Desmin/analysis ; Humans ; Leiomyoma/chemistry/*pathology ; Male ; Uveal Neoplasms/chemistry/*pathology ; Vimentin/analysis