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Biomedical subjects

K Liddell

Publications and source records attributed to K Liddell.

At least 19 recordsLinked to original sources

Lymphocytic infiltrates as a presenting feature of Sweet's syndrome with myelodysplasia and response to cyclophosphamide.

Sweet's syndrome has a well-recognized association with malignancies, around half of which have been acute myelogenous leukaemia. There are also numerous reports of Sweet's syndrome in association with myelodysplasia. We report two patients with Sweet's syndrome in whom the classical histological appearances were preceded by dermal lymphocytic infiltrates. A literature search using PubMed indicates that this phenomenon has not been previously reported. The cases demonstrate the chronicity of Sweet's lesions in association with haematological disease and the need for repeat biopsies to make the diagnosis. We also describe successful treatment with cyclophosphamide, which adds to the list of second-line drugs that may be used in Sweet's syndrome.

Aged↗

Generalized granuloma annulare sparing vaccination sites.

Generalized granuloma annulare (GA) is a chronic and widespread form of GA, less common than the localized type, in which the primary papular lesions may be arranged in either predominantly annular or non-annular configurations. Associations with numerous systemic disorders, including malignancies of the haematopoietic system, have been reported. There is a marked tendency to show the isomorphic or Koebner phenomenon. We report a most unusual case of generalized non-annular GA associated with chronic myelomonocytic leukaemia and myelodysplasia, in which the eruption showed striking sparing of vaccination sites.

Aged↗

Cutaneous necrosis associated with the antiphospholipid syndrome and mycosis fungoides.

The development of extensive cutaneous necrosis in a patient with tumour-stage mycosis fungoides is described. Skin biopsies showed a lymphomatous infiltrate, and thrombosis of dermal blood vessels. Investigation revealed the presence of anticardiolipin antibodies, a lupus anticoagulant, and low free protein S, which contributed to a prothrombotic state. Antiphospholipid antibodies have been detected in non-Hodgkin's lymphoma, but clinical manifestations are uncommon. Such autoantibodies may be produced by neoplastic lymphoid cells. The frequency with which antiphospholipid antibodies occur in mycosis fungoides is currently unknown.

Antiphospholipid Syndrome↗

Merkel cell carcinoma: the clinical course.

Merkel first discovered the cells named after him in the snout skin of voles in 1875. These cells are thought to originate from the neural crest and act as mechanoreceptors. When they have undergone malignant change, the neurosecretory granules in the cytoplasm may release various polypeptides, suggesting that the tumor is an APUDoma. In a computer search of the literature 121 cases were identified. It was revealed that the most common lesion is an erythematous nodule arising in the face or lower limb and occurring predominantly in women in their late 60s. The regional nodes became involved in half the patients, and the three-year survival was approximately 60%. Two unusual cases, in women 72 and 73 years old respectively, with metastasizing lesions that responded to a combination of surgery and radiotherapy are reported, and the literature is discussed.

Aged↗

Pyoderma gangrenosum associated with primary thrombocythaemia.

Pyoderma gangrenosum is most commonly associated with inflammatory bowel disease and rheumatoid arthritis, but it has been associated with various haematological malignancies. A 54-year-old man with no history of bowel disease or arthritis presented with a leg ulcer, which healed after treatment. Results of bone marrow aspiration were compatible with primary thrombocythaemia. Seven weeks later there were pronounced recurrence of the ulceration and pyoderma gangrenosum was diagnosed. The appearance of pyoderma gangrenosum associated with blood disorders may differ from that associated with bowel and joint disease.

Humans↗

Naevus striatus unguis.

Three patients presented with an asymptomatic longitudinal pigmented band in a nail. A junctional melanocytic naevus in the nail matrix was suspected; this was confirmed by histological examination in each case. Differential diagnosis and management are discussed, together with a review of the literature. Local excision is considered to be the treatment of choice.

Adult↗

A familial study of acne and eczema.

The incidence of eczema was assessed in acne patients and their first degree relatives and compared with control (non-acne) subjects and their relatives. It was found that there was a statistically decreased incidence of endogenous eczema in the acne patients.

Acne Vulgaris↗