The purpose of the present study was to precisely define the masticator space to eliminate the use of obsolete and confusing terms to describe the area, and to illustrate the common mass syndromes. Ct and mri of metastasis to the masticator space ajr:189, august 2007 491 ab fig. Large cell lymphoma of the masticator space with intracranial extension.
Masticator space eRMS in a 4yearold boy presenting with
Mr and ct findings in 46 cases with proven masticator space lesions were reviewed.
Infection secondary to odontogenic abscess o.
The masticator space (ms) is a deep facial space delineated by a splitting of the deep cervical fascia which encloses the four muscles of mastication: Mukherji and chong 2004).the ms also contains the ramus and. From the department of radiology, louisiana state university health science center, new orleans (dr. Meltzer de (1), shatzkes dr.
(1)department of radiology, albert einstein college of medicine, st.
1() and ()).the larger nasopharyngeal compartment contains the ramus and posterior body of the mandible, the lingual and inferior alveolar. There is an ill defined low density centered upon the left masticator space consistent with a collection. Because clinical assessment of lesions in this space may be difficult, ct and mr imaging is important for the characterisation and mapping of the pathology. The suprazygomatic portion of the masticator space (ms) or the temporal fossa is superficial and accessible to clinical assessment.
The approximate dimensions are 1.2 x 3.0 x 4 cm in orthogonal planes (trans x.
The nasopharyngeal masticator space or infratemporal fossa is deep and can only be adequately evaluated by imaging studies. 1 the source of the infection is usually a mandibular molar or recent dental procedure. Juvara first described this space while the first reference to ms was made by coller and yglesias.1 anatomy the ms as the name implies consists of the masticator muscles (medial and lateral pterygoid, temporalis and masseter) and the posterior body and ramus of the mandible The infrahyoid neck is the region of the neck extending from the hyoid bone to the thoracic inlet.
A fascial layer was found extending from the medial pterygoid muscle to the skull base separating the masticator from the parapharyngeal space.
Anatomic specimens were dissected to define better the fascial layer representing the medial wall of the masticator space. The masticator space (ms) is a deep facial space which contains the mandibular ramus, muscles of mastication and the mandibular branch (v3) of the trigeminal nerve. The masticator space is a distinct deep facial space, bounded by the superficial layer of deep cervical fascia and containing the four muscles of mastication and the ramus and posterior body of the mandible. The secondary tumor may also extend intracranially from the masticator space along the neurovascular bundle.
The masticator space contains the mastication muscles, ramus of the mandible, and mandibular nerve.
The abnormality involves the medial aspect of the masseter muscle and the lateral pterygoid. Masticator space anatomy and pathologic conditions are illustrated examples from computed tomography and magnetic resonance. By far the most common cystic lesion encountered in this space is the odontogenic abscess. The infiltrating process has an inflammatory morphology and involves the masticator space (ms) as well as the extent of the infratemporal fossa (if) and in (a) is seen extending into the buccal space.
The third branch of the.
It may be divided into a suprazygomatic compartment and a nasopharyngeal compartment (fig. Imaging of the masticator space clinical examination of the masticator space is difficult because of its extension deep to the ramus of the mandible. Traditionally the anatomy of the infrahyoid neck has been subdivided into a group of surgical triangles whose borders are readily palpable bones and muscles (figure). Trismus often complicates evaluation of masticator space disease.
Masticator space the ms is a term more familiar to the radiologist.
However, computed tomography (ct) clearly delineates the normal and pathologic anatomy of this. There is no fascia division between these areas. Sattur2, ishita banerjee1 1department of oral medicine and radiology,. Quick learning videos on radiology for ug and residents in radiologywe continue the neck spaces series by dr jyoti kumar in which the masticator spaces are d.
The separation of the masticator and parapharyngeal spaces is somewhat ambiguous.
Malignant tumours of the ms are commonly of mesenchymal origin, namely osteosarcomas, chondrosarcomas and rhabdomyosarcomas. The masticator space is a deep facial space with a complex anatomical structure. The masticator space is a fascial space that can be invaded by tumors from adjacent structures or from hematogenous metastases.tumor invasion of the masticator space usually upstages the original tumors. We evaluated the mr and ct findings of the masticator space lesions in order to identify the differences among the malignant and benign tumors and infectious conditions.
The masticator space is a large paired space containing primarily the muscles of mastication and associated nerves and blood vessels (figure 7).
In (b), the process extends to the skull base contained. Palacios), and the department of radiology and otolaryngology, university of illinois medical center, chicago (dr.
