What is a skin ultrasound?
It is an ultrasound focused on the skin and superficial tissues: epidermis, dermis, fat under the skin, vessels, follicles, nails. A probe placed on the skin, with gel, sends high-frequency ultrasound and reconstructs an image on screen. The higher the frequency, the finer the image of the superficial layers. The examination uses no radiation, needs no injection and takes place during the consultation.
The clinic's device: Clarius L20 HD3
The clinic uses a Clarius wireless portable ultrasound, with the L20 HD3 linear probe (8 to 20 MHz), designed for fine study of the skin. It connects to a tablet or smartphone: the image appears in real time and the dermatologist comments on it with you, at the time she examines your skin.
Exploring a nodule, cyst or lump
When a lesion lies under the skin (nodule, cyst, lump, lymph node, abscess), ultrasound helps specify its size, depth, content and relations to neighbouring structures. It can guide what comes next: monitoring, a procedure, specialist opinion or further tests. It complements the clinical examination and does not remove the need, where necessary, for a biopsy or specialised imaging.
Hidradenitis suppurativa
In hidradenitis suppurativa, an inflammatory disease of the skin folds, ultrasound shows nodules, abscesses and tracts under the skin, sometimes invisible on clinical examination, and specifies their extent. It helps choose treatment, decide on a possible procedure and follow progress under treatment.
Psoriasis and other skin diseases
In psoriasis, ultrasound can help assess skin thickness, nail involvement and, together with a rheumatologist, inflammation of tendons and joints. It also provides information in certain diseases such as localised scleroderma (morphoea), and is used to follow progress under treatment. It is not systematic: the dermatologist decides at the examination.
Aesthetic medicine: locating vessels before an injection
Before certain injections (Botox, hyaluronic acid), notably in vascular-risk areas such as the nose, nasolabial fold or glabella, ultrasound can help locate vessels and their depth, and adapt the technique. It is a safety and precision tool that complements the procedure without replacing it, and without making an injection risk-free: benefits, limits and risks are explained beforehand.
Locating a filler before dissolving it
A lump, asymmetry or swelling after a filler does not always have the same origin: excess product, oedema, inflammation, another cause. Ultrasound shows the filler already injected, its quantity and depth, to better target a possible dissolution with hyaluronidase. It is useful in women and men alike.
How the examination goes
The examination takes place at the consultation. You are made comfortable, gel is applied to the area and the probe is moved gently over the skin. It is painless, without radiation, needs no preparation and the image is commented on straight away. Its duration depends on the area and the question asked. Remember to bring your previous tests (ultrasounds, reports, photos) if you have any.
What ultrasound does not do
Dermatological ultrasound replaces neither the clinical examination, nor a biopsy when necessary, nor specialised imaging (ultrasound of an organ, MRI, CT) ordered from a radiologist. It explores superficial tissues, over a limited depth. The dermatologist always tells you what it lets her see, what it does not allow her to conclude and what comes next.
Where to have a skin ultrasound in Marrakech?
At the Skin & Aesthetic Clinic, in Guéliz, with Dr Sara Zahid, dermatologist, by appointment, in French, English or Arabic. Patients from other Moroccan cities or abroad are also seen, with a first contact possible on WhatsApp.