Characteristics of Functional Hyperthermia Detected in an Outpatient Clinic for Fever of Unknown Origin.

Functional hyperthermia (FH) is characterized by hyperthermia resulting from sympathetic hyperactivity rather than inflammation, and it is frequently overlooked by medical practitioners due to the absence of abnormalities in a medical examination. Although FH is an important differential diagnosis for fever of unknown origin (FUO), the literature on FUO cases in Japan lacks information on FH. In this study, we aimed to uncover the population of FH patients hidden in FUO cases.

Rhinogenic optic neuropathy with hemianopia caused by ethmoidal sinus mucocele.

A patient complained of acute right vision loss and headache. A computed tomography scan revealed ethmoidal sinus mucocele in the right ethmoid sinus that was compressing the optic nerve and emergency endoscopic sinus surgery was performed.

Kikuchi-Fujimoto disease manifesting bilateral lymphadenopathy.

Physicians should keep in mind that Kikuchi-Fujimoto disease can show bilateral lymphadenopathy like the present case.

Eyelid edema due to Cushing's syndrome.

Cushing's syndrome (CS) shows diverse signs such as centripetal obesity, moon face, and buffalo hump, which can complicate the diagnosis. Facial features including eyelid edema, as an underrecognized sign, can be diagnostic clues for an excess of corticoids in a CS patient.

Cat scratch disease without a history of cat exposure.

A patient complaining of swelling and tenderness in her left axilla was diagnosed with cat scratch disease despite no apparent history of cat exposure. Zoonosis can occur even in the absence of cat exposure because cat flea is also the vector of the pathogen through the flea feces.

Celiac artery dissection in polycystic kidney disease.

Autosomal-dominant polycystic kidney disease (ADPKD) is rarely complicated by celiac artery dissection. Dissection of the aorta and its major branches should be carefully differentiated in ADPKD patients with acute-onset abdominal pain.

An Elderly Male with Primary Sjögren's Syndrome Presenting Pleuritis as the Initial Manifestation.

Primary Sjögren's syndrome (SS) is an autoimmune disease that usually affects the exocrine glands in mid-dle-aged women. Fifteen percent of SS patients experience severe systemic extraglandular complications, and pleuritis is one of the rare complications of SS. We report the case of an elderly Japanese man who initially pre-sented with a prolonged fever and chest pain and was finally diagnosed with primary SS-associated pleuritis.

Orbital mass and hairy kidney as characteristics of Erdheim-Chester disease.

Erdheim-Chester disease (ECD) is a rare non-Langerhans cell histiocytosis, involving multiple organs. We report a case of ECD with typical features of an orbital mass and "hairy kidneys," whose recognition can lead to early diagnosis and treatment.

Isolated adrenocorticotropin deficiency induced by pembrolizumab for hypopharyngeal cancer: A case report.

We report a case of isolated adrenocorticotropin deficiency caused by pembrolizumab. This condition can be fatal, but its rarity causes under-recognition. Oncologists should pay attention to adrenal insufficiency due to pembrolizumab.

Pseudoacromegaly with acromegalic features in radiography.

Pseudoacromegaly is a condition characterized by acromegalic physical features without growth hormone excess, for which radiographic observation has seldom been reported. This is a rare case of pseudoacromegaly.

An adrenal incidentaloma caused by synchronous and isolated metastasis.

We report a patient with adrenal incidentaloma due to synchronous and isolated metastasis from lung cancer, which is a relatively rare condition. Close checkups for incidentaloma in oncologic patients are mandatory, leading to successful operation.

Acute pancreatitis without abdominal pain induced by administration of nivolumab and ipilimumab.

Immune checkpoint inhibitors (ICIs) such as nivolumab and ipilimumab are emerging agents for the treatment of cancers including melanoma. ICIs are known to cause immune-related adverse events (irAEs), including the development of enterocolitis, dermatitis, and nephritis. However, ICI-induced pancreatitis has seldom been reported, and its pathophysiology and clinical importance remain largely unknown.

Adult-onset Still's disease accompanying noninfective endocarditis.

Adult-onset Still's disease can develop valve lesions. Since AOSD may complicate valvular lesion, differentiation of endocarditis in patients with AOSD is required.

Large-vessel vasculitis induced by granulocyte colony-stimulating factor administration after chemotherapy.

Granulocyte colony-stimulating factor (G-CSF) is a relatively new drug that is used for recovery of chemotherapy-associated neutropenia. It is known to cause bone pain, headache and fatigue as side-effects; however, large-vessel vasculitis is extremely rare and its relation with G-CSF remains unknown. We describe a 49-year-old woman in whom arteritis developed after chemotherapy and subsequent G-CSF administration.

Massive pheochromocytoma.

Complications of pheochromocytoma, such as hypertensive emergency, can be critical. Clinicians should recognize that pheochromocytoma is not uncommon in patients with large adrenal tumors, and screening should be undertaken prior to any intervention.

Disseminated Mycobacterium genavense infection mimicking TAFRO syndrome.

TAFRO syndrome is a rare variant of idiopathic multicentric Castleman's disease, for which disseminated non-tuberculous mycobacteria (NTM) infection must be excluded. However, due to the slow and fastidious growth of the organisms, identification of the pathogen is often challenging. We herein describe a case of disseminated Mycobacterium genavence infection, in which manifestations of the patient were confusingly similar to those of TAFRO syndrome.

Invasive non-typeable Haemophilus influenzae infection due to endometritis associated with adenomyosis.

Background: The widespread administration of the Haemophilus influenzae type b vaccine has led to the predominance of non-typable H. influenzae (NTHi). However, the occurrence of invasive NTHi infection based on gynecologic diseases is still rare.

Correlations between Depressive Condition and Gastroesophageal Reflux Symptoms in Patients Visiting a Department of General Medicine.

To clarify the potential relevance of patients' chief complaints at a general medicine department to their self-rating depression scale (SDS) and frequency scale for symptoms of gastroesophageal reflux disease (GERD) (FSSG) scores, we analyzed data of 478 patients who visited our general medicine department. The chief complaints (553 symptoms of 447 patients) were categorized into major symptom-based groups: respiratory (31%), circulatory (3%), gastrointestinal (GI) tract (26%), neurology (8%), orthopedic and skin (10%), and systemic (22%) symptoms. The SDS score tended to be higher in females and younger patients.