Primary carcinoid tumors of the testis are exceedingly rare. They may originate as a pure form or as part of a testicular teratoma. To diagnose a testicular tumor as primary carcinoid, the possibility of metastasig must be carefully excluded. To our knowlege, none has been reported in Korean literature. We present a case of primary testicular carcinoid in a 36-year-old man. He had a painless, palpable mass on the right scrotum for 4 years. He underwent a radical orchiectomy. He is free of disease during 20 months postoperatively. Histologically and ultrastructurally this tumor showed a typical feature of carcinoid tumor of midgut derivation. A flow cytometric DNA analysis of this mass contained an aneuploid cell population.

We report a case of alveolar soft part sarcoma(ASPS) of the uterine cervix in a 57-year-old female. She was presented with vaginal bleeding and underwent total hysterectomy. A 1.1cm-sized, polypoid mass was found at the uterine cervix. Microscopically, it had shown an alveolar arrangement of tumor cells and characteristic Periodic acid-Schiff-positive, diastase-resistant, intracytoplasmic granules. Distinct cytoplasmic crystals were found on the ultrastructural examination and tumor cells showed immunoreactivity for smooth muscle actin, myoglobin and neuron-specific enolase, while nonreactive for desmin, vimentin and S-100 protein. Myogenic origin can be suggested with these immunohistochemical results.
Female ; Humans

To evaluate the prenatal development of human femur, a histologic study was made based on normal femora of 24 embryos and 122 fetuses ranging in age from 5 to 41 weeks of gestation. Following observations were made. 1) The femur starts to be formed as mesenchymal condensation in the lower limb bud at 5 weeks of gestation. 2) By the end of the embryonic period (8 weeks), most of the skeleton of lower limb bud consisted of cartilage model defined by perichondrium. 3) At 9 weeks of gestation, endochondral ossification and primary bony trabeculae were prominent in the central portion of cartilage model. 4) At 11 weeks of gestation, along with pregression of endochondral ossification proximally endochondral growth zone was established near the proximal chondro-osseous junction. 5) At 12 weeks of gestation, most centrally located trabeculae were removed, and the marrow cavity and hematopoietic cells were recognized. The cartilage canal was also recognized at this time in the proximal epiphyseal cartilage. 6) In the middle of prenatal life (15-30 weeks), the shape of the femur was reconstructed by remodeling process. 7) The lamellar bone began to form by 31 weeks of gestation. 8) At 15 weeks of gestation, proximal end of ossified shaft showed convexity, and at 29 weeks this convexity was altered to form a rather distinct angulation. 9) As the femoral shaft elongated, primary bony collar continued to develop near the growth plate and remained at the level of the hypertrophied cartilage.
Humans

The current classification of pituitary adenomas is based on cell type, largely ascertained by immunohistochemistry and electron microscopy. In an application of immunohistochemistry, pathologists have some problems in judging the results. An immunostaining result does not always correspond with a serum hormone level. It is also difficult to determine the nature of a tumor when a few cells are positive. We performed the immunohistochemical stains on 34 pituitary adenomas using polyclonal antibodies to six pituitary hormones [PRL (prolactin), GH (growth hormone), ACTH (adrenocorticotropic hormone), FSH (follicle-stimulating hormone), LH (luteinizing hormone), TSH (thyroid-stimulating hormone)] and compared with serum hormone level. The serum hormone level was increased in 14 cases (41.2%) of PRL, 7 cases (20.6%) of PRL & GH, 6 pleurihormonal cases (17.6%), 4 nonfunctioning cases (11.8%), 2 cases (5.9%) of FSH, and 1 case (2.9%) of GH. The most common immunohistochemical type of pituitary adenoma was 10 prolactinoma cases (38.5%), followed by 7 pleurihormonal cases (26.9%), 4 null cell cases (15.4%), 3 cases of mixed PRL & GH (11.5%), 1 case of ACTH (3.8%) and 1 FSH & LH case (3.8%). The corresponding rates of the serum hormone level and immunostaining results were 94.1% in GH, 88.9% in TSH, 85.7% in LH, 82.4% in ACTH, 66.7% FSH, and 61.8% in PRL. In the immunostaining for FSH, 12 cases showed less than 5% positivity and most of them exhibited the normal serum hormone level. In conclusion, the most common elevated serum hormone and immunohistochemical type of pituitary adenoma was prolactinoma. The corresponding rate of the serum hormone level and immunostaining result was the highest in GH cell adenoma and was the lowest in prolactinoma. The cells showing less than 5% positivity seem to be entrapped normal cells.
Adenoma ; Adrenocorticotropic Hormone ; Antibodies ; Classification ; Coloring Agents* ; Immunohistochemistry ; Luteinizing Hormone ; Lymphocytes, Null ; Microscopy, Electron ; Pituitary Hormones ; Pituitary Neoplasms* ; Prolactinoma

A total of 10 cases of surgically resected intestinal tuberculosis specimens was subjuected for analysis of its macroscopic characteristics. Intestinal tuberculosis was broadley classified into the ulcerative type (4 cases), ulcero-hypertrophic type (3 cases) and mixed type (3 cases) on the basis of its gross features. The ulcerative type was characterized by multiple, segmental lesions of napkin-ring stricture with variable length of uninvolved mucosa, secondary to the circumferential or annular ulceration. Various forms of relatively superficial ulcers were also scattered. Their ulcer beds were rather granular, being covered with a necrotic detritus although the ulcer margins were relatively well defined with areas of some nodularity. The ulcero-hypertrophic type affected the ileocecal region and ascending colon in a tubular form by segmental thickening of the wall. The diseased segment of mucosa appeared cobble-stone, represented by coalescence of irregular ulcers and hemorrhage. There were scattered small ulcers in the separate portions of terminal ileum. The macroscopic distinctions between the intestinal tuberculosis and Crohn's or ischemic enterocolitis were presented in detail.

A total of 322 fetuses and 29 embryos were examined light microscopically to evaluate the morphological development of the human gastrointestinal tract with increasing gestational age. The human embryos were analysed by reconstruction of serial section slides. One hundred and forty fetuses ranging from 15 to 41 weeks of gestation were used for correlating the gestational age and the body weight with the measurement of the small and large intestines. 1) The esophagus develps from the distal part of the foregut through a partition of the tracheoesophageal septum. Initially the esophagus is short, but it elongates rapidly and reaches its final relative length and position by the seventh week. The epithelium of the esophagus proliferates and completely obliterates the lumen by the seventh week, but recanalization occurs by the ninth week. The esophageal epithelia consist of three different groups of cells; stratified squamoid cells, ciliated columnar cells and tall columnar cells by the 21th week. 2) The stomach appears as a fusiform enlargement of the caudal part of the esophagus at the fourth week. During next two weeks the stomach acquires its adult shape and final position. The primordial gastric pits and the parietal cells appear at the eighth and eleventh weeks, respectively. 3) As the midgut elongates, it forms a ventral U-shaped loop, called primitive intestinal loop by the fifth week. At this stage the cecum appears as a swelling from the caudal limb of the intestinal loop. By the seventh week the bulks of the caudal limb of the intestine herniate into the umbilical cord, in which the loop rotates 90 degrees counterclockwise around the axis of the superior mesenteric artery. During the tenth week, the intestine returns to the abdomen and undergoes a further 180 degrees counterclockwise rotatation. 4) The cloaca is divided into two parts by a urorectal septum at the fifth week. By the seventh week the urorectal septum has fused with the cloacal membrane, dividing it into a dorsal anal membrane and ventral urogenital membrane. The anal membrane ruptures at the eighth week. 5) During the sixth week the duodenal lumen becomes completely filled with proliferating epithelium. The villi project from the mucosa of the small and large intestines at the eighth and eleventh weeks, respectively. The villi of large intestine become resorbed again after the 21th week. At the fifth week Paneth cells appear through the entire length of the intestine including the rectum, but disappear in the colon and the rectum after the 36th week. 6) The developing Auerbach's plexuses are well recognized along the outside of muscle coat throughout the gastrointestinal tract, but demonstrate no immunoreactivity for the anti-neuron specific enolase antibody. The neuroblasts in the myenteric plexus reveal strong positivity for the anti-neuron specific enolase antibody at the eleventh week, but the ganglion cells differentiate by the fourteenth week. 7) Differentiation of the gastrointestinal wall and development of the myenteric plexus begin form the esophagus and progress caudally down to the colon. But the anorectal wall is differentiated from the cloaca more earlier than the esophagus, stomach and colon are. 8) The small and the large intestines elongate progressively with the increasing gestational age and body weight and increase approximately 5.6 and 5.4 folds, respectively during the 25 weeks from the 15th to 41th week of gestation. At the 40th gestational week the small intestine is 5.68 times the length of the colon. 9) The correlation between the body weight (BW), crown-rump length (CR) and intestianl length (small intestine (SI), large itestine (LI) is presented as: SI (cm)= -33.67 + 4.14CR + 11.62 (BW)(1/3), LI (cm)= 5.56 + 0.76CR + 0.007BW (gm), CR (cm)= 7.82 + 0.015 SI + 0.41 (BW)(1/2).
Adult ; Male ; Female ; Humans

Hereditary sensory and autonomic neuropathies (HSAN) are disorders of hereditary neuropathy mainly affecting sensation and also accompanying autonomic nervous system dysfunction. They are divided into five subtypes based on inheritance pattern and clinical manifestation. Among HSAN, type II is characterized by autosomal recessive inheritance, presentation at later stage of life, slow progression and mainly sensation abnormalities. The main pathology of the peripheral nerve is the absence of myelinated nerve fibers. Type IV is very rare disorder and only a few cases have been reported. It is characterized by autosomal recessive inheritance, presentation at birth as failure to thrive, retarded motor development, unexplained pyrexia and rapidly progressive and severe clinical course. The main pathology of the peripheral nerve is a loss of unmyelinated and small myelinated nerve fibers. We report two cases of type IV and one case of type II especially focusing on ultrastructural findings, which are characteristic of and diagnostic for HSAN.
Autonomic Nervous System ; Failure to Thrive ; Fever ; Hereditary Sensory and Autonomic Neuropathies* ; Inheritance Patterns ; Nerve Fibers, Myelinated ; Parturition ; Pathology ; Peripheral Nerves ; Sensation ; Wills

Sequential development pattern of the intrahepatic bile ducts is analyzed histologically and immunohistochemically using 50 embryonal and fetal liver specimens. Serial sections are made to reconstruct the intrahepatic biliary system, and monoclonal antibodies were used for differential antigenic expression of the biliary system. By 9 weeks of gestation a layer of small round cells, namely plate cells, became first noticed around large portal vein branches close to the hepatic hilum. These plate cells extended subsequently to more distal branches. The ductal plates became duplicated to contain cleft-like spaces and tubular structures. These tubules gradually became incorporated into surrounding connective tissue around the protal vein, and gave the appearance of the individualized bile duct. At term(40 weeks of gestation) the smallest branches of the portal vein were still surrounded by a discontinuous ductal plate. The ductal plate cells showed strong positive reaction for CAM 5.2 and AE1/AE3. They also expressed CK 19 and AE1 from 9 weeks of gestation on. The immunoreactivity of bile duct cells for cytokeratins persisted throughout the whole gestational period. Carcinoembryonic antigen was expressed along the luminal border of the bile duct, duplicated ductal plate and intrahepatic bile canaliculi. Laminin was demonstrated along the basement membrane of the bile duct cells from 9 weeks of gestation. Few duplicated ductal plates were composed of two different types of cells, duct-like cells and hepatocyte-like cells. The duct-like cells and hepatocyte-like cells showed same imrhunoreactivity with the hepatocytes and the bile duct cells, respectively, suggesting that the intrahepatic bile duct cells are actually coming from the hepatocytes around the branches of the portal vein.
Humans

Malignant myoepithelioma is a rare neoplasm of salivary gland which may either arise de novo or develop in a pre-existing pleomorphic adenoma. The malignant myoepithelioma occurs in 0.45% of major salivary gland tumors. Malignant myoepitheliomas arising in the pleomorphic adenoma number less than 20 in English literature and 1 in Korea. We describe a case of malignant myoepithelioma arising in a recurrent pleomorphic adenoma of the left parotid gland of a 61-year-old man. The tumor was ill-defined and composed of polygonal or plasmacytoid myoepithelial cells. Infiltration to surrounding tissue, hemorrhage, necrosis, increased mitotic activity and vascular tumor emboli indicated its malignant nature. There were several satellite nodules with histologic features of typical pleomorphic adenoma. Immunohistochemically, tumor cells were reactive for S-100 protein, AE1/AE3, vimentin, smooth muscle actin and glial fibrillary acid protein.
Actins ; Adenoma, Pleomorphic* ; Glial Fibrillary Acidic Protein ; Hemorrhage ; Humans ; Korea ; Middle Aged ; Muscle, Smooth ; Myoepithelioma* ; Necrosis ; Parotid Gland ; S100 Proteins ; Salivary Glands ; Vimentin

Juvenile cellular adenofibroma of the breast is a unique neoplasm of the breast that should be differentiated from other important benign and malignant lesions of the juvenile breasts. We report a case with it's characteristic clinical, gross and histological features. The tumor was in the right breast with the size of 20 cm in maximum extent. This patient was also associated with hemihypertrophy of the right side. Microscopically the masses were characterized by prominent stromal cellularity associated with pericanalicular duct proliferation.
Child ; Male ; Female ; Humans