[An uncommon cause of delayed walking: idiopathic palmoplantar hidradenitis]. / Une cause inhabituelle de retard d'acquisition de la marche : l'hidradénite palmo-plantaire idiopathique.

INTRODUCTION: Idiopathic palmoplantar hidradenitis is an uncommon neutrophilic dermatosis, occurring in children and young adults. Its pathogenesis is incompletely understood. It is characterized by spontaneous resolution, but it can relapse in 50% of cases. We describe a case of a child with atypical idiopathic hidradenitis remarkable for its impact on his motor development. OBSERVATION: A 3-year-old boy was admitted to the pediatric unit for etiological assessment of delayed walking. Medullary MRI and TSH were normal. He was referred to a dermatologic consultation for recurrent and painful palmoplantar lesions, giving an equinus antalgic posture. Examination found erythematous tender plantar nodules. The palms were not affected. The exam was otherwise normal. Diagnosis of idiopathic plantar hidradenitis, pressure urticaria, and plantar erythema nodosum were discussed, leading to a skin biopsy. The histopathologic findings of nodular, neutrophilic infiltrates around the eccrine glands confirmed the diagnosis of idiopathic plantar hidradenitis. Anti-inflammatory treatment was given, followed by complete resolution of the lesions, but persistent equinus posture. COMMENTS: Idiopathic palmoplantar hidradenitis is an uncommon neutrophilic dermatosis, distinct from neutrophilic eccrine hidradenitis. It corresponds to neutrophilic infiltrates of the eccrine sweat glands. It is more frequently reported in children and young adults with no medical history. Its pathogenesis is not completely explained. The lesions are usually painful, hindering walking for a few days or even delaying it, as for our patient. These lesions typically involute, but they may recur in more than half of the cases. CONCLUSION: Through this observation, we highlight the atypical impact of idiopathic hidradenitis and the value of a dermatological examination in case of delayed walking.

[Giant schwannoma of musculocutaneous nerve (a case report)]. / Schwannome géant du nerf musculocutané (à propos d'un cas).

Schwannoma is a tumor that develops from nerve sheath. The authors report an original observation of a giant schwannoma developed in the arm depending on the musculocutaneous nerve. The diagnosis was based on MRI appearance. Confirmation of the diagnosis was made by histological examination. Surgical treatment was resection, taking care preserving adjacent nerve fibers. This allowed recovery without any sequela. Recurrence rate and potential for malignant transformation of this type of tumor is low.

[Capsulo-synovial lesions of the hip joint at the stage of total prosthesis implantation. Study based on 328 cases]. / Les lésions capsulo-synoviales de l'articulation coxo-fémorale au stade de la prothèse totale. Etude basée sur 328 observations.

The authors have made a systematic study of specimens of synovium and capsule removed during total hip replacement for slowly and rapidly progressive arthritis, rheumatoid coxarthritis and necrosis. Out of 1 120 cases, there were 328 tissue samples suitable for satisfactory morphological interpretation. A number of conclusions are drawn from the detailed analysis of the different types of lesion. The vast majority of cases of common arthritis consist of hyperplastic and degenerative metamorphic lesions often associated with signs of inflammation. The dominant feature at this stage of coxarthritis is the histiocytic macrophage response to foreign bodies of bone and joint cartilage; it is frequent in rapidly progressive arthritis and necrosis. Several cases of synoviocytic and pseudo-tumour histiocytic hyperplasia are identified, as well as myxoid and amyloid degenerative disease of connective tissue and microcrystal formation.