Familial disseminated plaque type porokeratosis with multiple horns and squamous cell carcinoma involving anal skin.

Porokeratosis is a disorder of keratinization showing a well-defined lesion with a hyperkeratotic ridge on the border that contains the coronoid lamella. We report familial (autosomal dominant with reduced penetrance) disseminated plaque type (Mibelli's type) porokeratosis in a father and son. In the father, there were multiple horns and a large squamous cell carcinoma in a large lesion over the perianal region that reached up to the squamo-columnar junction of the anal mucosa and even invaded the anal sphincteric muscles. Disseminated lesions of the Mibelli's type, development of horns, and malignancy in this unusual location have not been previously reported.

Squamous cell carcinoma in plantar ulcers in leprosy: a study of 11 cases.

The objectives of our study were to describe and analyse the malignancies that occurred in plantar ulcers of leprosy patients. The possible predisposing conditions, duration and extent of the spread of the tumour were also studied. All patients with trophic ulcer of the foot attending the urban leprosy clinic in our hospital from January 1998 to January 2003 were screened for change to malignancy. During the study period, 79 cases of plantar ulcers in leprosy were seen. The mean age of these cases was 39.9 years with male-to-female ratio of 4:1. Eleven cases with plantar ulcers and malignant change were diagnosed in our hospital during the study period. The male-to-female ratio was 4.5:1. The mean age of these patients was 60.6 years. Their age ranged from 46 to 75 years. Nine of the cases were treated cases of borderline tuberculoid leprosy, while two had treated lepromatous leprosy. In our study, two distinct morphological types of malignant changes were seen. Histopathologically, all cases, except one, were of well-differentiated squamous cell carcinoma variation; one case had verrucous carcinoma. Though trophic ulcers are common in leprosy cases, only long-standing and neglected ones undergo malignancy.

Ulceraciones en la lepra. Tratamiento / Ulcerations in lepra. Management

Se estudian las úlceras en la lepra, su etiología, frecuencia y localización, la mayoría de carácter neurotrófico. Se describen diferentes tratamientos tópicos y quirúrgicos, resaltando las dificultades terapéuticas y la cronicidad (AU)

Carcinoma epidermoide sobre ulceración neurotrófica en enfermos de lepra

Se hacen consideraciones sobre la frecuencia de cáncer y lepra, exponiendo la experiencia personal en esta asociación patológica y la de c´nacer sobre úlceras crónicas en enfermos de lepra. A continuación se presenta una enferma de 78 años afecta de lepra lepromatosa con inactividad bacteriológica desde 1958 y con importantes secuelas neurológicas y óseas que desde hace 3 años presenta una extensa ulceración neurotrófica en pie derecho, vegetante en los últimos meses, con diagnóstico de hiperplasia pseudoepiteliomatosa y carcinoma epidermoide.

Role of antineural antibodies in perpetuation of a pre-existing peripheral nerve damage in leprosy.

This study was carried out in order to find out whether antineural antibodies had a role to play in perpetuating pre-existing nerve damage in leprosy. Indirect ELISA was carried out on sera from 20 leprosy patients and five normal controls using antigen prepared from peripheral nerves of a cured bacteriologically negative leprosy patient. None of the patients had significant levels of IgG antibodies whereas eight of them (40%) had significant levels of IgM antibodies. However, there was no correlation with duration of disease, treatment received, nerve enlargement or active neuritis. The nature of these antibodies is discussed.

Cancer associated with leprosy.

Eighty-seven leprosy patients with cancer, seen between 1960 to 1984, were studied. Cancer in patients with leprosy occurred in a younger age group compared to the general population. The most common type of malignancy seen among males was squamous cell carcinoma of the lower extremity while in hospital patient population it was cancer of head and neck. Among the females, carcinoma cervix was the most common as in the hospital patients. The types of malignancy occurring among leprosy patients was similar to that of the hospital patient population with the exception of an increase in incidence of squamous cell carcinoma of extremities.

[Characterization of chronic plantar ulcers in former leprosy patients]. / Cancérisation des plaies chroniques plantaires chez les anciens malades de la lèpre.

Between 1988 and 1992, 21 biopsies for pathological examination were taken from 20 Senegalese leprosy patients suffering from chronic plantar ulcers (CPU) suspected of malignant transformation. The diagnosis of squamous cell carcinoma was effectively made in 13 cases and that of pseudoepitheliomatous hyperplasia in the remaining 8 cases. The mean period of time between the onset of CPU and that of malignant transformation was 10 years (range: 1 to 15 years); the mean annual frequency of the malignant transformation was 2 per 1,000 CPU. In countries where pathological examination is not available, below knee amputation could be considered whenever main clinical signs of malignant transformation are present. In countries where pathological examination is available, the therapeutic decision may differ according to the diagnosis: below knee amputation supplemented with block dissection of inguinal lymph nodes whenever possible in cases of carcinoma; below knee amputation depending on the function status of the foot and on the volume of tumor in case of pseudo-epitheliomatous hyperplasia.