To the doctrine of keratodermia palmaris et plantaris symmetrica (Besnier)

Skin diseases characterized by anomalies of keratinization in the sense of hypertrophy of the stratum corneum were named by Lebert in 1864 keratosis (keratosis circumscripta et keratosis diffusa). Hebra in his textbook on skin diseases distinguishes between the following two forms: keratosis without simultaneous participation in the process of skin papillae (callositas, clavus, cornu cutaneum) and keratosis, accompanied by more or less pronounced resolution of the papillary layer (verruca, ichthyosis).

Cornu cutaneum – Past and present

Cutaneous horn has been a source of controversy throughout the history. It evoked interest nearly half a millennium before and continues to do so. Cornu cutaneum has been found to be associated with several pre-malignant and malignant skin conditions. The pre-malignant conditions commonly include actinic keratoses and Bowen’s disease. Uncommonly, it is due to the presence of an underlying squamous cell carcinoma. Thus, an effort is needed to determine the pathology present at the base of the horn for proper management of the disease. Wide excision biopsy is a common denominator in the therapy of this peculiar disorder.

A giant cutaneous horn of oral commissure: a case report

Cutaneous horn is a conical, circumscribed, dense hyperkeratotic protrusion from skin with epithelial cornification. It is also known by the Latin name ‘Cornu cutaneum’. This rare medical entity resembles animal horn but histological disparity is present between both. They are more commonly present in sun exposed sites or areas that are prone for actinic radiation, burns and hence frequently seen in forearm and upper part of face. Only few cases have been reported with cutaneous horns in unusual sites. Cutaneous horns occurring in oral cavity or perioral regions are extremely rare. The significance of knowing about this dead keratinous cutaneous horn is that it may occur as a part of or in association with a wide range of underlying pathologies, either malignant, premalignant or benign. Majority are due to benign pathologies. We report an unusual presentation of cutaneous horn in left oral commissure of a 45-year-old gentleman which is an extremely rare perioral location for such an ailment.

Extrém méretű cornu cutaneum az alsó ajkon

A pácienst évtizedek óta az alsó ajakpíron növekvő, az észleléskor 15 cm-es cornu cutaneummal és fekélyes nyálkahártyaelváltozással irányították osztályunkra. CT és PET-CT vizsgálatot követően lineáris excisiót és tumor exstirpatiótvégeztünk. A szövettani vizsgálat malignitást igazolt. Azóta a beteget az onko-team döntése alapján szoros kontroll alatttartjuk, jelenleg is tünet- és panaszmentes.

Cutaneous horn arising from the scrotum

A cutaneous horn, cornu cutaneum, is a hard, conical projection composed of compacted keratin that resembles the horns of animals. They commonly occur on sun-exposed areas, including the head, ears, forearms and hands. Cutaneous horns are extremely rare. Although most are benign in nature, a significant portion may harbour a malignant or pre-malignant lesion, and histopathological analysis of the base of the lesion is imperative to categorise it as one of benign aetiology or one of a more sinister pathology. We present a case of a 46-year-old male who presented with a 2-month history of a painless, firm, rapidly growing conical projection arising from his scrotum. Clinically, a non-tender curved, yellow-brown, horn-like projection was observed arising from the median raphe of his scrotum. With informed consent, a full-thickness excision, with adequate excision of the base of the horn, was performed under local anaesthesia. Macroscopically, the exophytic keratinous lesion was 7.5 cm long and 1.8 cm wide, with the length of the horn far outweighing the width at its base. Histopathological analysis confirmed the presence of a cutaneous horn arising from a condyloma acuminatum as evidenced by a verruciform architecture with tiers of parakeratosis in association with hypergranulosis and koilocytes. No dysplastic or malignant changes were present in the epithelium. According to our knowledge, this is the first case in the English literature of a cutaneous horn arising from the scrotal skin.

Cornu cutaneum of Pinna

Introduction Cornu cutaneum is a nodule of dense keratin, resembling the horn of animals, an uncommon clinical condition predominantly seen in elderly men, and even rare to be seen on the pinna. Case Report A 70 year old man, presented with a horn like swelling on the left pinna for 2 years. The lesion was excised and histopathological examination did not show any underlying or associated conditions. Discussion The cause of worry here is not the disfigurement, but the probability of underlying premalignant or malignant condition. Exposure to sunlight is considered as the etiology. Ours being a tropical country where exposure to sunlight could not be avoided, a high clinical vigil and early intervention is recommended to reduce the mortality and morbidity from the spectrum of diseases resembling this condition.

Cutaneous horn arising from a basal cell carcinoma of forehead: a case report

<p class="abstract">The term cutaneous horn or “cornu cutaneum” is used to describe a well circumscribed usually conical hyperkeratotic mass arising from another cutaneous lesion. Several lesions have been reported to occur at the base of the keratin mass. Here we report a rare case of cutaneous horn arising from a basal cell carcinoma (BCC) over the forehead of a 52 year old female patient.</p><p class="abstract"> </p>