Arcanobacterium haemolyticum: two case reports.

Two uncommon presentations of Arcanobacterium Haemolyticum infection (sinusitis and pharyngitis) are described, emphasizing the poor response to commonly used antibiotics and the possibility of serious local and systemic complications. The difficulties still encountered in the clinical diagnosis are underlined, since this organism could easily pass unrecognized in bacteriological cultures.

Cervicofacial actinomycosis: still a difficult differential diagnosis.

Cervicofacial actinomycosis, a rare chronic infectious disease, is, however, an important clinical entity, due to the difficulties involved, still today, in its diagnosis. Following personal experience in a case referred to our Department, and in agreement with reports in the literature, attention is drawn to the presenting clinical manifestations, stressing that these are often confusing since they mimic those of other diseases, Moreover, many pre-operative investigations (radiological scans, incisional biopsy, fine-needle aspiration) are generally nonspecific. Finally, surgical excision of the mass is now the last essential step to make a definitive diagnosis and define the appropriate antibiotic therapy.

Correlation between fine needle aspiration biopsy and histologic findings in parotid masses. Personal experience.

Pre-operative fine-needle aspiration biopsy findings have been compared with those of post-operative histopathology in 146 patients with parotid masses. Post-operative histology showed 124 benign and 22 malignant lesions: pre-operative fine-needle aspiration biopsy correctly identified 118/124 (95.1%) benign masses with an accurate classification of the tumour in 111/118 cases (94%). Fine-needle aspiration biopsy identified malignancy in 12/22 cases (>50%). In the remaining 7 cases (six benign lesions and one malignant), cytology was not diagnostic. There were no false positive cases. In the present study, the accuracy, sensitivity and specificity of cytologic findings were, respectively, 94%, 57.2% and 100%. The accuracy of fine-needle aspiration biopsy was seen to be higher in benign than in malignant lesions. Fine-needle aspiration biopsy represents a first choice diagnostic tool for the study of palpable head and neck masses excluding abscesses and vascular neoplasms. However, for a correct diagnosis, great skill is required and cytology does not always reach the sensitivity and specificity of post-operative histology. Therefore, in the presence of a palpable head and neck mass, resistant to medical treatment, surgery is still strongly indicated and cytology is very useful in planning the surgical approach.

Role of dynamic posturography (Equitest) in the identification of feigned balance disturbances.

Clinico-instrumental criteria to reliably detect simulated vertigo remain to be defined. Computed dynamic posturography (Equitest) has been used to identify additional factors to distinguish simulated, from real vertigo. The present study population comprised 23 normal subjects and 16 patients with documented vestibular impairment. Normal subjects were also studied during a state of simulated vertigo. In malingerers, the Equilibrium Score and the Composite Equilibrium Score showed a statistically significant reduction in all test conditions as compared to normal subjects, patients and "non-malingerers". Upon Sensory Analysis, statistically significant differences were found for the somatosensory component between malingerers and "non-malingerers". In 20/23 cases, Strategy Score values recorded in malingerers were 2 Standard Deviations lower than the mean obtained in "non-malingerers" in at least one of the six test conditions. By combining the latter observation with Goebel's 1st criterion it was possible to differentiate malingerers from non-malingerers with 86.9% sensitivity and 89.7% specificity. The Equitest, therefore, in combination with conventional methods, provides the clinician with an important tool, in the identification of a state of simulated vertigo.

Statherin levels in saliva of patients with precancerous and cancerous lesions of the oral cavity: a preliminary report.

OBJECTIVE: The aim of this study was to measure concentration of human salivary statherin in patients with oral cavity pathologies and salivary gland diseases. SUBJECTS AND METHODS: Levels of statherin were analysed with High Performance Liquid Chromatography (HPLC) in following groups of subjects: group A: 24 patients with neoplastic diseases of salivary glands, group B: 13 patients with inflammatory lesions of salivary glands, group C: 13 patients with precancerous and cancerous lesions of the oral cavity excluding salivary gland tumors, group D: 20 healthy volunteers (control group). RESULTS: Our preliminary data indicated a sensible reduction of the statherin level in the saliva of patients with precancerous and cancerous lesions of the oral cavity (group C) compared with the healthy subjects (group D). The statherin levels are not significantly reduced either in the inflammatory (group B) or in the salivary glands tumours (group A), compared with the healthy subjects (group D). CONCLUSION: Statherin could play a protective effect in oral cavity in association with its other functions.