Mitsugu Kuroda

Temporal Abscess due to Odontogenic Infection : Report of a Case

Due to acute inflammation of the tissue around the 1st molar in the left mandible, a lesion developed into an abscess in the temporal region. Magnetic Resonance Imaging (MRI) was very useful to detect the area of inflammation and to treat the abscess.

A case of static bone cavity

Herein, we present a case of static bone cavity. Results of radiological examination involving sialography in conjunction with CT are presented along with a review of the literature. Identification of the defect in the lingual mandible is necessary for the diagnosis of this abnormality, and we recognize that CT is the most appropriate examination method for the differential diagnosis of this defect. CT depicts the lesion clearly so that determination of the content is possible. Consequently, if this abnormality is suspected by conventional roentgenology such as panoramic radiography, we consider that the case should be immediately followed by CT examination.Herein, we present a case of static bone cavity. Results of radiological examination involving sialography in conjunction with CT are presented along with a review of the literature. Identification of the defect in the lingual mandible is necessary for the diagnosis of this abnormality, and we recognize that CT is the most appropriate examination method for the differential diagnosis of this defect. CT depicts the lesion clearly so that determination of the content is possible. Consequently, if this abnormality is suspected by conventional roentgenology such as panoramic radiography, we consider that the case should be immediately followed by CT examination.

Actinomycosis originating in the submandibular gland: Report of a case

We report herein a very rare case of actinomycosis originating in the submandibular gland in which malignancy was suspected. A 56-year-old man visited our clinic with a chief complaint of painless mass in the right submandibular region. From the imaging diagnosis, we suspected malignant tumor in the submandibular gland. Under general anesthesia, right radical neck dissection and excision of the submandibular gland with the above mass were carried out. Histopathological diagnosis of actinomycosis in the submandibular gland was made. Because the focus exists within the gland, we consider this case as a primary submandibular gland actinomycosis. Two years postoperatively, the tumor has not recurred. On diagnosis, it is necessary to differentiate this disease with other benign or malignant tumors.

Displacement of the tooth root into mandibular canal

Tooth root displacement in most cases is caused iatrogenically during tooth extraction. There are many reports in the literature of displacement of upper teeth into the maxillary sinus and of lower wisdom teeth into the surrounding soft tissue. A very rare case of displacement into the mandibular canal is presented herein, and, to our knowledge, no such cases have been reported to date. The patient was a 37-year-old man who underwent extract ion of the right mandibular 1st molar tooth at a local dental office on January 8 of 1991. In the middle of January 1992, the patient noticed swelling of the gingiva in the right mandibular region. This swelling gradually worsened and he visited our clinic on January 30.

Hemangioendothelioma of the masseter: Report of a case

A rare case of intramuscular hemangioendothelioma of the masseter muscle is reported. Although angiography did not detected the tumor mass, radionuclide angiography revealed positive findings. Radionuclide angiography with a combination of US examination and MR imaging was effective for the diagnosis of intramuscular hemangioma.

Hemangioendothelioma of the Masseter; A Case Report.

Hemangioma is common in the head and neck area, but intramuscular hemangiomas are rare. We report a case of hemangioendothelioma of the masseter.A 26-year-old male with swelling of the left cheek was referred to the Department of Otolaryngology of Nikko Memorial Hospital. The mass had appeared three month before and had gradually become bigger during the previous week. On physical examination, a 4.8cm×4.6cm tumor mass was palpated in the left cheek. The mass could be freely moved from side to side but not vertically.A horizontal slightly curved upper cervical incision was made 2 to 3cm below the angle of the mandible. The masseter muscle was dissected and the mass was removed en bloc along with a few strands of skeletal muscle. The postoperative course is uneventful and facial palsy did not occurr.The mass was diagnosed pathologically as hemangioendothelioma of the masseter.

Adenocarcinoma of sublingual salivary gland; A case report.

A 40-year-old woman complained of a painless mass in the left side of the floor of the mouth. A 2×2cm round, smooth, nontender mass was palpable on the left side of the floor of the mouth; it was fixed to the symphysis of the mandible. No cervical lymph nodes were palpable. T2-weighted MRI scan of the tumor showed smooth margins and a heterogeneous signal. A contrast-enhanced CT scan showed a slightly enhanced mass lesion. Radionuclide scanning with 67Ga showed a hot tumor. Radiography revealed a malignant tumor originating in a minor salivary gland or a sublingual gland. Microscopic examination of the tumor showed adenocarcinoma.Radical neck dissection was combined with resection of the left side of the floor of the mouth and of the internal margin of the mandible. The surgical defect was reconstructed with a rectus abdominis musculocutaneous flap.Postoperative evaluation of mastication and articulation was good. The patient had no evidence of recurrence one year after surgery.