Skin (Los Angeles). Mar; PLANTAR CLAVUS (HELOMA DURUM) AS A REACTION TO A PENETRATING HAIR. GOLDMAN L, MORAITES RS. Clavi may be further classified as a hard clavus (heloma durum) or a soft clavus The key differential diagnosis of a clavus is a verruca vulgaris, particularly a . Needling vs Nonsurgical Debridement in Plantar Verrucae: Which is Best?. Clavus is distinguished from plantar warts, which are caused by human papilloma virus and tend to occur multiply. Plantar warts also occur in areas that are not.

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July Learn how and when to remove this template message. For other uses, see Corn disambiguation.

A corn or clavusplural clavi or clavuses is a distinctively shaped callus of dead skin that usually occurs on thin or glabrous hairless and smooth skin surfaces, especially on the dorsal surface of toes or fingers. Lesions are managed primarily by removing the mechanical stress that caused the lesion and by appropriate use of keratolytics when necessary. To exclude other differential diagnosesa skin biopsy may be taken. If the patient has diabetes mellitus or peripheral vascular disease in the relevant area, however, ulceration and infection, with a difficult course, may follow.

Because of their shape, corns intensify the pressure at the tip and can cause deep tissue damage and ulceration.

The location of soft corns tends to differ from clavuz of hard corns. By registering you consent to the collection and use of your information to provide the products and services you have requested from us and as described in our privacy policy and terms and conditions. Search Bing for all related images. Views Read Edit View history.


In extreme cases correcting gait abnormalities may be required. They often serve a useful purpose, as calluses on the palms of a manual laborer or on the soles of a worker who must chronically walk over difficult terrain eg, partially crushed seashells without shoes.

J Med Assoc Thai.

Corn (medicine) – Wikipedia

The most important differential to consider is contact dermatitis, often superimposed on the callus. Corns show a very dense collagen plug surrounded by epidermis with the changes noted above. Differential Diagnosis Tinea Pedis Contrast with interdigital soft corn Plantar Wart Contrast with hard corn Plantar Wart s bleed when shaved Plantar Wart s are tender to lateral compression Plantar Wart s have black dots thrombosed vessels.

Causes Due to excessive pressure or focal irritation Excessive pronation Results in Hammertoe deformity Excessive pressure on Metatarsal heads Tight shoes or otherwise poorly fitting shoes Hammertoe deformity common cause Hallux Valgus Bunion Excessive supination Highly arched foot longitudinal arch Strength imbalance of peroneal and tibial muscles Secondary causes Plantar Wart Foreign body granuloma Porokeratosis plantaris discreta.

The corn’s center is not soft, however, but indurated. Both show exaggerated skin markings and may show hemorrhage, yellow discoloration from old hemorrhage, or hyperpigmentation.


In addition, the dermal papillae may be angled toward or away from the center of the lesion. If there is constant stimulation of the tissue producing the corns, even after the corn is surgically removed, the skin may continue to grow as a corn. Corns clavi are very well demarcated and usually are less than 1. The differential diagnosis of a callus is seldom an issue. The key differential diagnosis of a clavus is plantsr verruca vulgaris, particularly a verruca plantaris.


Soft clavi are seen on more moist areas, such as between the toes.

Etiology Pathophysiology Calluses are due to lateral pressure combined with downward pressure on the skin, producing a reaction. What is the Cause of the Plantzr

Started inthis collection now contains interlinked topic pages divided into a tree of 31 specialty books and chapters. If there is direct injury to the underlying dermis, the result is a scar cicatrixconsisting of fibrotic connective tissue changes in the dermis.

Orthopedics – Foot Disorders Pages. Page Contents Page Contents Who is at Risk for Developing this Disease? The clinician cannot exclude other causes of an ulcer, however, such as verrucous carcinoma, so care must be taken to ensure proper management should an ulcer appear. Callus shows a markedly dense, usually orthokeratotic stratum corneum underlain by mild acathosis, variable hypergranulosis, and increased collagenization of the superficial dermis.

They can sometimes occur on the thicker skin of the palms or bottom of the feet.

Corn (medicine)

Callo suavecallo blando trastornocallo blandoheloma blando. A hard corn is called a heloma durumwhile a soft corn is called a heloma molle. When calluses are desirable, as in ceratin training situations, their development may be accelerated by applying a protein cross-linker, such as formalin, topically to the area.

Soft corns frequently found between adjacent toes stay moist, keeping the surrounding skin soft. Back Links pages that link to this page. Corn olantar toe C Clavi may be further classified as a hard clavus heloma durum or a soft clavus heloma mole.