ABSTRACT
The secondary neoplastic involvement of the cervical plexus in patients with head and neck malignancies is extremely rare. MR examination of the neck revealed the diffuse neoplastic infiltration of the right C2 root, in a 57-year-old patient with several months long pain in the right ear region and a history of the tongue squamous cell carcinoma. Associated perineural tumor spread and consequent distal involvement of great auricular nerve and vagus nerve were evident. Best of our knowledge, this is the first reported involvement of the cervical plexus in patients with head and neck cancers, associated with the clearly documented interconnection between the cervical plexus and cranial nerves via great auricular nerve.
Subject(s)
Carcinoma, Squamous Cell/pathology , Cervical Plexus/pathology , Neoplasm Invasiveness/pathology , Peripheral Nerves/pathology , Tongue Neoplasms/pathology , Vagus Nerve/pathology , Carcinoma, Squamous Cell/diagnostic imaging , Carcinoma, Squamous Cell/surgery , Cell Movement , Combined Modality Therapy , Earache/etiology , Humans , Magnetic Resonance Imaging , Middle Aged , Neoplasm Invasiveness/diagnosis , Radiography , Tongue Neoplasms/diagnostic imaging , Tongue Neoplasms/surgeryABSTRACT
The aim of this study was to determine whether triceps brachii muscle volume can be adequately estimated from a single anatomical cross-sectional area (ACSA) and can the same model be used for prediction after training. Thirty-five healthy male non-athletes (age 21.6 ± 2.5 years, body mass index 24.8 ± 3.5 kg · m(-2)) volunteered for this study. The volumes of the upper arm extensors were calculated from magnetic resonance imaging (MRI) sequence scans and regression models were developed, which were used to predict muscle volumes from single MRI cross-sectional scans taken at different points along the humerus length. The same procedure was repeated after 12 weeks of maximal resistance training of the elbow extensors. Correlation coefficients were calculated for Model A with CSA(max), humerus length (HL), and body mass index (r = 0.919), a model with CSA(50%) and HL (r = 0.922), and a model with CSA(60%) and HL (r = 0.920) (P < 0.001). The standard error of estimate for Model A, Model CSA(50%), and Model CSA(60%) was 8.0%, 7.7%, and 7.8% respectively. Thesame prediction formula can be used for the left arm (r = 0.904). If a single ACSA is used for triceps brachii volume prediction, the best fit is with Model CSA(60%) and HL, both before and after training (r = 0.941). By introducing humerus length into the calculation, we simplify the procedure for volume measurement, since it can be obtained during MRI scanning.
Subject(s)
Anatomy, Cross-Sectional , Arm/anatomy & histology , Body Mass Index , Muscle, Skeletal/anatomy & histology , Resistance Training , Adult , Arm/growth & development , Elbow Joint , Humans , Humerus , Magnetic Resonance Imaging/methods , Male , Models, Biological , Muscle, Skeletal/growth & development , Reproducibility of Results , Young AdultABSTRACT
Dermatofibrosarcoma protuberans (DFSP) of the breast is a rare malignant tumor, and its preoperative diagnosis is extremely difficult. Local recurrence of DFSP is frequent after incomplete resection because of either false diagnosis or inadequate standard surgical excision. We present a case of DFSP that showed disconcordant results using different imaging modalities, suggesting that the MRI finding of subcutaneously located highly vascular tumor with suspicious kinetics but together with negative Cho peak on (1H) MRS, might be suggestive of the diagnosis of DFSP.
