Items tagged “pm”

206 results found
Article

Otic ganglion

The otic ganglion is one of four parasympathetic ganglia of the head and neck. It receives parasympathetic fibers from the glossopharyngeal nerve. It supplies the parotid gland with not just parasympathetic, but also sympathetic and sensory fibers that pass through the gland. Gross anatomy sma...
Article

Carotid canal

The carotid canal is a passage within the petrous temporal bone and transmits the internal carotid artery, internal carotid venous plexus, and sympathetic plexus. Its inferior opening is called the carotid foramen and is situated anteriorly to the jugular fossa and medially to the carotid plate....
Article

Parietal foramen

The parietal foramina are inconstant foramina on each side of the posterior aspect of the parietal bone near the sagittal suture and represent a normal anatomic variant. They transmit emissary veins, draining to the superior sagittal sinus, and occasionally a branch of the occipital artery. The ...
Article

Temporal bone

The temporal bone is situated on the sides and the base of the cranium and lateral to the temporal lobe of the cerebrum. The temporal bone is one of the most important calvarial and skull base bones.  Gross anatomy The temporal bone is divided into several main parts/portions 1-3: squamous pa...
Article

Mandibular fossa

The mandibular fossa or glenoid fossa is the smooth concave articular surface formed by both the squamous and petrous parts of the temporal bone. It forms the superior articular part of the temporomandibular joint and lodges the condyle of mandible.
Article

Styloglossus muscle

The styloglossus muscle is one of the extrinsic tongue muscles.  Summary origin: the apex of the styloid process adjacent to the origin of the stylomandibular ligament, and deep fibers of the ligament itself insertion: merges with the hyoglossus and inferior longitudinal muscle of the tongue ...
Article

Base of the skull

The base of the skull (or skull base) forms the floor of the cranial cavity and separates the brain from the structures of the neck and face. The skull base and vault collectively form the neurocranium. Gross anatomy The base of the skull is a bony diaphragm composed of a number of bones - fro...
Article

Anterior cranial fossa

The anterior cranial fossa constitutes the floor of the cranial vault which houses the frontal lobes of the brain. Gross anatomy Structures present in the midline of the anterior cranial fossa from anterior to posterior are:  groove for superior sagittal sinus groove for anterior meningeal v...
Article

Middle cranial fossa

The middle cranial fossa is a butterfly-shaped depression of the skull base, which is narrow in the middle and wider laterally. It houses the temporal lobes of the cerebrum. Gross anatomy The middle cranial fossa can be divided into medial and lateral parts. In the medial part, the following s...
Case

Langerhans cell histiocytosis

  Diagnosis almost certain
Prashant Mudgal
Published 22 Mar 2014
81% complete
X-ray CT MRI
Article

Posterior cranial fossa

The posterior cranial fossa is the most posterior aspect of the skull base housing the brainstem and cerebellum. Gross anatomy The following structures are present from anterior to posterior: internal acoustic meatus foramen magnum groove for superior petrosal sinus jugular foramen hypogl...
Case

Hydrosalpinx

  Diagnosis almost certain
Prashant Mudgal
Published 28 Mar 2014
80% complete
CT
Article

Air space nodule

An air space nodule is a small (few millimeters to 1 cm), ill-defined, nodular opacity that is often centrilobular in location and is non-specific, seen in many conditions. Commonly it represents a focal area of consolidation or peribronchiolar inflammation, and can indicate endobronchial spread...
Article

Interface sign (HRCT chest)

The interface sign is a feature seen on HRCT chest imaging and refers to the presence of irregular interfaces at the margins of pulmonary parenchymal structures or the pleural surface of the lung. It suggests interstitial thickening.
Case

Radiographic assessment of basilar invagination

  Diagnosis certain
Prashant Mudgal
Published 03 Apr 2014
65% complete
CT
Article

HRCT chest - expiration (protocol)

Expiratory high-resolution CT (HRCT) imaging corresponds to an additional CT acquisition performed as part of the HRCT chest protocol. It represents a scan performed with the patient on supine and images obtained at the end-expiration.  It is a useful method for detecting small airways obstruct...
Article

Complete tracheal rings

Complete tracheal rings are a rare, isolated tracheal or tracheobronchial anomaly resulting from abnormal cartilage growth, forming a complete ring and often causing airway stenosis. Clinical presentation Clinically, it manifests as respiratory distress in infants or mild symptomatic airway co...
Case

Giant cell tumor of bone

  Diagnosis almost certain
Prashant Mudgal
Published 13 Apr 2014
81% complete
CT MRI
Article

Ring of fire sign (adnexa)

The ring of fire sign, also known as ring of vascularity, signifies a hypervascular lesion with peripheral vascularity on color or pulsed Doppler examination of the adnexa due to low impedance high diastolic flow 1. This sign can be seen in: corpus luteum cyst (more commonly) ectopic pregnancy
Case

Subacute combined degeneration of a spinal cord

  Diagnosis certain
Prashant Mudgal
Published 13 Jul 2014
89% complete
MRI

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