Biomedical subjects

R Hoffmann

Publications and source records attributed to R Hoffmann.

543 records · Page 31Linked to original sources

PubMedDate not supplied

Surgical treatment of bone metastases in breast cancer.

Breast cancer is an osteotropic primary tumor. For the patient metastases to the skeleton imply functional restriction with immobility and pain. Unlike other primary carcinomas breast cancer shows a distinctly longer life expectancy after occurrence of skeletal filiae. LOTE even states a mean survival rate of 4 years. Impending or manifest pathologic fractures as well as pain refractory to medication therapy are indications for operative treatment. As a function of the estimated life expectancy, the number and localisation of metastases and possible adjuvant therapy (hormonal or chemotherapy, radiotherapy) the operative procedure must be chosen. Available options are' intramedullary stabilizing procedures, compound osteosynthesis or endoprothetic means. The objective is the restitution of the weight bearing capacity of the affected skeletal region in addition to pain reduction. This leads to early function and mobility and improves the patient's quality of life.

Bone Cements↗

PubMedDate not supplied

Elements of the interleukin-1 signaling system show hair cycle-dependent gene expression in murine skin.

Stringently controlled changes in the local, cytokine-mediated signaling milieu of hair follicles (HF) have been implicated as major elements of hair cycle control and several lines of clinical and experimental evidence point towards interleukin-1 (IL-1) as an important inducer of hair loss. To address the question as to whether the steady state mRNA levels of the gene expression of the IL-1 family parallel distinct phases of the murine hair cycle, we have exploited the high degree of synchrony during depilation-induced HF cycling in mice, and have determined the mRNA levels of IL-1alpha, IL-1beta, IL-1-receptor antagonist, IL-1 receptor (R)-I and IL-1-R-II by semiquantitative RT-PCR. Our results indicate that the induced murine hair cycle is associated with profound fluctuations in the steady state mRNA levels of members of the IL-1 signaling system. Most interestingly, IL-1alpha and IL-1beta transcript levels increased dramatically with the onset of spontaneous catagen (around day 18) and peaked during telogen (day 25). These fluctuations in the IL-1alpha and IL-1beta transcript levels were paralleled by substantial expression changes of the corresponding signal transducing type I IL-1 receptor. Therefore, our findings are consistent with the concept that IL-1alpha, IL-1beta, IL-1-RI and IL-1-RII are involved in the control of catagen development.

Animals↗

PubMedDate not supplied

Vulvar amyloidosis mimicking giant condylomata acuminata in a patient with multiple myeloma.

We report a case of unusual cutaneous amyloidosis involving the vulva in a patient with multiple myeloma. Genital examination revealed a dense agglomeration of verrucous papules and pedunculated condyloma-like tumors. The correct diagnosis was established by immunohistochemical examinations that visualized large amounts of lambda light chains, whereas no reaction was detected for kappa light chains or human papilloma virus. In this way, the differential diagnosis of condylomata acuminata could be ruled out. Condyloma-like lesions have been described in patients suffering from multiple myeloma, but the present case is unusual because of the extensive involvement. Vulvar amyloidosis should be added to the list of possible presentations of myeloma-associated systemic amyloidoses.

Adult↗