No abstract available.
Intussusception*

Schwannomas are neurogenic tumors that arise from Schwann cells of the neural sheath. They are most often benign and solitary. Ancient schwannoma is a rare variant of schwannoma with a typical characteristics of a slow growing benign tumor. A case of ancient schwannoma which originated from the lingual nerve has not been reported in the literature yet. The clinical and histological aspects of this tumor are discussed and the literature regarding this rare entity is reviewed.
Lingual Nerve* ; Neurilemmoma* ; Schwann Cells

OBJECTIVE: To find the developing features of H reflex by the gradual increase of stimulation intensity, to evaluate the variability of each H reflex latency, and to verify the consistency of the side-to-side difference of bilateral H reflex latencies in normal population. METHOD: Fifty normal persons (100 limbs) were studied. H reflexes were elicited using standardized technique from Braddom and Johnson. RESULT: H reflex developed in the stimulation intensity at which M response was not evoked in 46 of total 100 limbs. The latency difference between the longest and shortest in each ipsilateral evoked potential was 0~2.1 ms (mean 0.65+/-0.44 ms). In the side-to-side latency difference between the variously evoked H waves, the mean value of maximal one was 1.28+/-0.63 ms (0.4~2.6 ms), and the mean value of the minimal one was 0.24+/-0.35 ms (0~1.5 ms). The mean side-to-side latency difference between the H waves of maximal amplitudes was 0.69+/-0.46 ms (0.1~1.6 ms), and the mean side-to-side difference between the shortest latencies was 0.61+/-0.53 ms (0~2.1 ms). Among these findings the latency difference of the maximal amplitude was observed in 47 cases with 0~1.5 ms, in 3 cases with more than 1.5 ms. CONCLUSION: In diagnosing the S1 radiculopathy with the side-to-side latency difference it will be reasonable to use the latency of maximal amplitude or the shortest latency as diagnostic tool, and reevaluation will be needed with the diagnostic criteria of 1.5 ms latency difference.
Evoked Potentials ; Extremities ; H-Reflex* ; Humans ; Radiculopathy

Objectives: The aim of this study was to examine the association between the sleep pattern, chronotype (midpoint of sleep on free days) and the depressive symptoms in adults aged 19 years and over in Korea. This study also investigated the mediating effect of perceived usual stress (PUS) and self-rated health (SRH) on the association between chronotype and depressive symptoms. Methods: Among the subjects of the 7th Korea National Health and Nutrition Examination Survey (KNHANES) 2016 and 2018, 16142 adults aged 19 or over responded to the survey and finally 8604 were analyzed according to the exclusion conditions. Logistic regression analysis was conducted to see the risk of depressive symptoms, suicidal ideation over sleep pattern, chronotype. Finally, mediation analysis was performed in order to clarify how PUS and SRH are associated to chronoytpe and depression. Results: After controlling for potential covariates, weekly sleep duration < 5 hours, ≥ 10 hours was associated with depressive symptoms. And late bed time sleeping after am 1:00 and later midpoints of sleep was associated with a higher level of depressive symptoms. Additionally, the PUS and SRH between chronotype and depressive symptoms showed a serial multiple mediation effect. Conclusions Short or long sleep duration, late bed time and later midpoints of sleep on free days are associated with depressive symptoms. Furthermore, the mechanism between chronotype and depressive symptoms needs to be further clarified by identifying the serial multiple mediation effects of PUS and SRH.

No abstract available.
Lung Neoplasms* ; Lung*

Scrub typhus, an acute febrile infectious disease caused by R. tsutsugamushi, has been reported from various parts of the far east and pacific rim of Asia including Korea. It is well known that all human pathogenic rickettsia share an affinity to endothelial cells of the small blood vessels and evoke vascular inflammation variably associated with a rash, microthrombi, and hemorrhage. We infected the ICR mice by inoculating sublethal doses of R. tsutsugamushi R19 strain intraperitoneally and observed the pathologic changes by time sequence. The histopathologic features of experimentally induced scrub typhus in the mice were generally nonspecific interstitial inflammations characterized by interstitial pneumonitis, periportal inflammation, multifocal hepatic necrosis, interstitial nephritis, sinusoidal engorgement, and lymphohistiocytic cell infiltration in lymph nodes and spleen. Contrary to the general features of other rickettsial diseases, the pathologic process of scrub typhus experimentally induced by R. tsutsugamushi R19 strain mainly involved the interstitial connective tissue but not the blood vessels.
Animals ; Liver/pathology ; Lung/pathology ; Male ; Mice ; Mice, Inbred ICR ; Scrub Typhus/*pathology ; Spleen/pathology

Contrary to general perception, thin acral lentiginous melanoma can metastasize. Sentinel lymph node metastases are found in a significantly greater proportion of patients with thin melanoma showing histological evidence of regression. In these cases, metastatic melanoma within lymph nodes may stimulate an immune response, resulting in regression of the primary lesion. However, a small number of thin acral lentiginous melanoma without regression also metastasize. We report a case of thin acral lentiginous melanoma with lymph node metastasis showing regression.
Humans ; Lymph Nodes* ; Melanoma* ; Neoplasm Metastasis*

Kasabach-Merritt phenomenon does not occur with common hemangioma, rather it is associated with the more aggressive Kaposiform hemangioendothelioma and rarely with other vascular neoplasm. We report the case of an adult who was diagnosed as Kaposiform hemangioendothelioma complicated by Kasabach-Memtt phenomenon. This is the first report in Korea of an adult with Kasabach-Merritt phenomenon who has osteolytic changes of femur, pelvic bone, and lumbar spine.
Adult* ; Femur ; Hemangioendothelioma* ; Hemangioma ; Humans ; Kasabach-Merritt Syndrome ; Korea ; Pelvic Bones ; Spine ; Vascular Neoplasms

No abstract available.
Aspergillosis*