Histochemical characteristics of the masseter and temporalis muscles of the rhesus monkey (Macaca mulatta).

The histochemical characteristics, cross-sectional area and capillary of the skeletal muscle fibers of the anterior and posterior regions of the superficial masseter and the temporalis muscles are described for juvenile and adult rhesus monkeys of both sexes. Slow twitch fatigue resistant (S), fast twitch fatigue resistant (FR) and fast twitch fatigable (FF) fibers were found in varying proportions throughout the muscles; however some fibers with an intermediate myofibrillar ATPase activity were observed in the anterior masseter. No significant differences for any of the variables were found between male and female juveniles for a specific muscle sample site.

Neuroanastomosis of orthotopically transplanted palmaris longus muscles.

Palmaris longus (PML) muscles of rhesus monkeys were transplanted, with or without anastomosis of the median nerve, to the nerve stump of the autograft. Because PML autografts revascularize spontaneously, vascular anastomoses were not performed. Muscle fibers regenerated in all autografts with neuroanastomosis, but in only three of eight autografts without neuroanastomosis.

Malignant haemangiopericytoma: case report and ultrastructural study.

A case of a rapidly fatal malignant haemangiopericytoma arising in the deep tissues of the face is recorded. The histology of the tumour was anaplastic but otherwise typical. Ultrastructural study confirmed the diagnosis by revealing tumour cells with delicate interdigitating cytoplasmic processes and basement membrane formation resembling pericytes.

Free autografting of entire limb muscles in the cat: histochemistry and biochemistry.

Fifty extensor digitorium longus muscles of 25 cats were autografted, 33 with and 17 without prior denervation. After 50 days, no significant differences were observed between predenervated and nonpredenervated autografts. Autografted muscles weighed 48% of the weight of control muscles.

Behavior of different nuclear probes for detection of cancer by nuclear magnetic resonance.

A physical explanation is given for the finding that the spin-lattice relaxation time T1, obtained by nuclear magnetic resonance from equivalent malignant and non-malignant samples, is greater for the phosphorus isotype 31P than for the proton 1H. The nuclear relaxation of the phosphorus proceeds by way of its interaction with associated cell water. Within limits determined by other variables, T1 is expected to vary inversely as the square of the gyromagnetic ratio.

The free autografting of entire limb muscles in the cat: morphology.

Normal or pre-denervated extensor digitorum longus (EDL) muscles were sucessfully grafted in place of the contralateral EDL muscles in cats. Histological preparations of 57 grafts were examined at intervals from 4 to 170 days after transplantation. The morphological sequence of events in a cat muscle graft is similar to that in the rat except that the time course of regeneration is considerably slower.

Physiological characteristics of skeletal muscles of dogs and cats.

Our purpose was to determine if physiological characteristics of skeletal muscles of dogs and cats are related to their histochemical and biochemical characteristics. Maximum oxygen consumption (VO2max) and blood flow (Q) at VO2max were determined for in situ muscles of dogs and cats. Compared to cat muscles, dog muscles per unit mass had higher succinate oxidase activities, VO2max's, and Q's at VO2max's.

Primary cutaneous phaeohyphomycosis caused by Drechslera spicifera.

A primary cutaneous lesion in a 5-year-old boy who had recently received chemotherapy for acute lymphocytic leukemia was found to be caused by a dematiaceous fungus, Drechslera spicifera. The lesion was an erythematous macule that rapidly developed necrotic ulcerations. The fungus, which is commonly found in soil and as a plant pathogen, was isolated from cultures of the lesion and from an excisional biopsy specimen.

Cancer Detection by NMR in the Living Animal.

The purpose of this paper is to review NMR experiments [1, 2] on a transplantable tumor in mice and to discuss the feasibility of using noninvasive NMR for cancer detection in humans.

Recognition of cancer in vivo by nuclear magnetic resonance.

Pulsed nuclear magnetic resonance has been used to differentiate in vivo between normal mouse tail tissue and a malignant transplanted melanoma, S91, located on the tail. The tumor displayed a nuclear (proton) spin-lattice relaxation time of approximately 0.7 second contrasted with the simultaneously measured normal tail tissue relaxation time of approximately 0.