Biomedical subjects
Yuh-Chyun Chiang
Publications and source records attributed to Yuh-Chyun Chiang.
Cavernous hemangioma of the bony external auditory canal.
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Pediatric Kikuchi-Fujimoto disease masquerading as a submandibular gland tumor.
Kikuchi-Fujimoto disease, also known as histiocytic necrotizing lymphadenitis, is a rare disorder that typically affects the cervical lymph nodes. The disease usually occurs in women in their late 20s or early 30s. Reports in the pediatric literature are sparse. Most authors consider Kikuchi-Fujimoto disease as a self-limiting disorder that requires no specific management but long-term follow-up. The clinical features of Kikuchi-Fujimoto disease are easily confused with other less-benign conditions. Thus, an early biopsy is instrumental in making definite diagnosis and preventing unnecessary investigations. We describe a case of Kikuchi-Fujimoto disease in an 8-year-old boy which presenting as a submandibular gland tumor. The case illustrates the clinical features of this unusual condition and emphasizes the potential confusion with other diagnoses.
Measurement of tongue movement during vowels production with computer-assisted B-mode and M-mode ultrasonography.
OBJECTIVES: We sought to apply B- + M-mode ultrasonography in combination with the cushion-scanning technique (CST) in quantitative analysis of tongue movement during vowel articulation. STUDY DESIGN AND SETTING: Twenty normal persons (10 women and 10 men) were enrolled in this study. Each individual was asked to enunciate 5 vowels:/e/, /i/, /aI/, /o/, and /ju/. A noninvasive diagnostic technique, computer-assisted B-mode plus M-mode ultrasonography, was used in combination with the CST to assess their tongue movement. The sonographic signals were recorded on a video recorder and then transferred to a personal computer via a frame grabber for digital assessment. RESULTS: M-mode images show an amplitude-time diagram, whereas B-mode images reveal midsagittal tongue configuration. The ranges of tongue movement in midsagittal plane in male speakers during production of the vowels /e/, /i/, /aI/, /o/, and /ju/ were 8.29 +/- 1.76, 4.00 +/- 0.78, 13.82 +/- 2.86, 14.05 +/- 1.63, and 6.72 +/- 1.66 mm, respectively; for female speakers, the averages were 7.19 +/- 0.92, 3.36 +/- 1.31, 12.74 +/- 2.16, 12.86 +/- 2.18, and 7.11 +/- 2.09 mm, respectively. CONCLUSIONS: The computer-assisted B-mode plus M-mode ultrasonography in combination with the CST provides a standardized and quantifiable ultrasonographic examination for the clinical investigation of tongue movement during vowel articulation. In our study group, there was no difference in the thickness of tongue or the range of tongue movement in midsagittal plane during articulation of the selected vowels between males and females. Further exploration can be extended in the field of speech research by this valuable tool.
Intraparotid Kikuchi-Fujimoto disease masquerading as a parotid gland tumor.
The Kikuchi-Fujimoto disease, also known as histiocytic necrotizing lymphadenitis, is a self-limiting lesion of unknown cause first described in 1972 independently by Kikuchi and Fujimoto et al. This self-limiting disorder usually occurs in Asian women in their late 20s or early 30s. Typically, it runs a benign course and appears to resolve spontaneously 1 to 6 months after definite diagnosis. The Kikuchi-Fujimoto disease usually manifests as a localized cervical lymphadenopathy; therefore, most patients with this disease are seen in ears, nose, and throat practice. Nodal involvement other than in the neck area or extranodal involvement is rare. In this situation, however, the Kikuchi-Fujimoto disease is easily confused with other less-benign conditions. We describe a case of Kikuchi-Fujimoto disease in a 30-year-old man that presented as a parotid gland tumor. This is the third study to document intraparotid Kikuchi-Fujimoto disease in the English literature. Our report illustrates the clinical features of this unusual condition and emphasizes potential confusion with other diagnoses.