Polyarteritis nodosa (PAN) is a systemic necrotizing vasculitis that is generally restricted to medium-sized vessels. Here we describe the first case of a patient in which a bilateral testicular mass was a presenting symptom and the diagnosis was made on the basis of testicular histopathology. A 53-year-old Asian man presented with a history of constitutional symptoms and testicular swelling. Scrotal ultrasound revealed two avascular, bilateral, intratesticular lesions. The bilateral testicular abscess was treated without improvement. The patient developed left seventh cranial nerve palsy during his admission. The clinical changes made vasculitis or a related disorder more likely and the patient underwent a right testicular biopsy. Histopathology demonstrated features of transmural inflammation and fibrinoid necrosis of medium-sized vessel walls, consistent with PAN. This case illustrates the difficulty in diagnosing polyarteritis nodosa with isolated bilateral testicular swelling and the delay in the diagnosis. After 9 months of follow-up, no relapse had occurred and the patient's testosterone level was on the lower side of normal.
Abscess ; Asian Continental Ancestry Group ; Biopsy ; Facial Nerve ; Follow-Up Studies ; Glycosaminoglycans ; Humans ; Inflammation ; Middle Aged ; Mononeuropathies ; Necrosis ; Paralysis ; Polyarteritis Nodosa ; Recurrence ; Systemic Vasculitis ; Testicular Diseases ; Testosterone ; Vasculitis

Objective: To establish a surveillance in Dong Thap, at the border with Cambodia by assessing the presence of DENV serotypes and CHIKV among patients hospitalized at Dong Thap general hospital. Methods: Cross-sectional descriptive analysis was conducted on a cohort of 131 patients hospitalized with acute fever and symptoms compatible with dengue or chikungunya. The study was conducted from January 2012 to February 2013. The full clinical picture was established as well as serological and molecular detection. Serological analysis was sequentially performed on blood samples collected on admission and an average of seven days after admission. The detection of IgM antibody to DENV was performed by IgM capture ELISA and the detection of DENV and CHIKV RNA was done by reverse-transcription multiplex PCR. Results: 101 patients out of 131 (77%) were confirmed with dengue. All four dengue serotypes were detected with a predominance of DENV2 and DENV4. No chikungunya infection was detected although reported in neighboring Cambodia. A differential efficiency of serological dengue detection was observed. Efficiency was 29% upon admission and 53% after seven days on the same patients. 30 patients out of 131 (23%) were negative with both DENV and CHIKV. Conclusions: Dengue is at risk of being underestimated and chikungunya is not systematically detected. Changes in detection and surveillance procedures are therefore discussed to increase efficiency of dengue detection and continue the monitoring the emergence of CHIKV in Dong Thap province and in Vietnam.

Objective: To record the human cases of dengue fever (DF) and investigate the Aedes mosquito species circulating during the Hanoi 2011 DF epidemics. Methods: 24 different outbreak points were recorded in 8 districts between August and December 2011. Results: 140 patients were hospitalized following dengue diagnostic with a predominance of males (59.3%) and the 15-34 age class. Only DENV-1 (11.27%) and DENV-2 (88.73%) serotypes were detected in human samples. Mosquito sampling performed in and around patients households revealed the predominance of Aedes aegypti (A. aegypti) (95.15%) versus Aedes albopictus (4.85%). Conclusions: There is a positive correlation between the population density of A. aegypti and the number of human cases and duration of outbreaks. This was not observed for Aedes albopictus. Three pools of A. aegypti were positive with dengue virus, two with DENV-1 and one with DENV-2.