A mastoid lateral oblique X‑ray is a targeted radiographic projection that images the mastoid portion of the temporal bone at an oblique lateral angle. It highlights mastoid air cells and middle‑ear structures to detect mastoiditis, bone erosion, fractures or chronic ear disease. It’s quick and low‑dose but less sensitive than CT, so CT is preferred if detailed assessment or complications are suspected.

An oblique view on an X-ray is taken with the patient rotated so the X-ray beam passes at an angle between frontal (AP/PA) and lateral projections. This angled perspective separates overlapping structures, improving visualization of bones and joints, clarifying lung or rib detail, and helping detect fractures, dislocations, or lesions that may be hidden on standard views. Angle commonly about 30–45°.

A mastoid X‑ray images the mastoid bone’s air cells behind the ear to detect infection (mastoiditis), fluid, bone erosion or sclerosis. It helps evaluate complications of middle ear infections, suspected cholesteatoma, temporal bone fractures or chronic ear disease and aids pre‑operative assessment. It is a quick, low‑dose radiograph often used alongside clinical exam and CT or MRI if more detail is needed.

Costs for a mastoid X‑ray vary by country and provider. In the United States it typically ranges from about $100–$400. In the UK it’s usually free through the NHS, while private clinics charge roughly £50–£200. In India expect around ₹200–₹1,000. Exact prices depend on location, facility, and whether additional imaging or consultation is included.

A mastoid problem is inflammation or infection of the mastoid air cells—a honeycomb of bone behind the ear—usually resulting from untreated middle-ear infection. Symptoms include ear pain, swelling behind the ear, fever, drainage and reduced hearing. Diagnosis uses clinical exam and imaging. Prompt antibiotic therapy, drainage procedures or surgical mastoidectomy may be needed to prevent complications such as abscess, bone erosion or intracranial infection.

A lateral X‑ray is taken with the beam directed from one side to the other, producing a true profile (90° to AP/PA) that separates anterior and posterior structures. An oblique view is obtained with the patient rotated or the beam angled between frontal and lateral (often ~45°), giving a slanted projection to visualize anatomy or fractures not clearly seen on standard AP/PA or lateral images.