treatment

The first question a patient often asks their FP after receiving a diagnosis of breast cancer (BC) is “What will my treatment be?” This article will help FPs answer this complex question by reviewing multimodal therapy for BC, which is contingent on molecular subtype and stage.

»Neutropenia is seen in 5%–10% of healthy people
Based on absolute neutrophil count, neutropenia is commonly defined as
mild (1.0–1.5 × 109
/L), moderate (0.5–0.9 × 109
/L) or severe (< 0.5 × 109
/L).1
However, the reference interval is specific to the population. Mild asymptomatic neutropenia per the above definition is common in people of subSaharan African, Arab or West Indian ancestry,2
and is strongly associated
with the Duffy-null phenotype of red blood cells that protects against
Plasmodium vivax malaria.
2 Common causes include medications, infection, nutritional
deficiency, malignant disease and autoimmune disease
Causes include underproduction (e.g., myelodysplastic syndrome),
immune-mediated destruction or redistribution of neutrophils to the
endothelium and reticuloendothelial system. Antithyroid, anti-infective
and psychotropic drugs, as well as chemotherapy, are causes of druginduced neutropenia.3,4 Transient neutropenia may occur after acute
viral infection and typically resolves within 2 weeks. Joint swelling, rash,
bony pain, splenomegaly or lymphadenopathy may suggest malignant or
autoimmune disease.
3Investigation should begin with a repeat complete blood count
and peripheral blood film
Neutropenia is often identified incidentally. Persistent and unexplained
neutropenia requires further work-up for a range of causes, including
chronic viral infection (e.g., hepatitis, HIV) and nutritional deficiency (e.g.,
vitamin B12) (Appendix 1, available at www.cmaj.ca/lookup/doi/10.1503/
cmaj.220499/tab-related-content).
4 Treatment of mild neutropenia should be directed at the
underlying cause
Patients with mild neutropenia are not at substantially increased risk of
infection.5
The neutrophil count should be checked every 3–6 months for
at least 1 year to rule out progression to more severe neutropenia.
5 Patients with moderate-to-severe neutropenia for more than
6 months should be referred to a specialist
Patients with recurrent or severe bacterial infections (e.g., requiring hospital admission or intravenous antibiotics), abnormalities on peripheral blood
films (e.g., circulating blasts, hairy cells, large granular lymphocytes, dysplastic granulocytes) or pancytopenia also warrant referral to a specialist
(e.g., hematologist, internist, pediatrician).1
Febrile neutropenia (absolute
neutrophil count < 0.5 × 109
/L and an oral temperature > 38.0°C sustained
over 1 h) requires immediate treatment with broad-spectrum antibiotics.

Chronic anal pain is diffi cult to diagnose and treat, especially with no obvious anorectal cause apparent on clinical examination. This review identifi es 3 main diagnostic
categories for chronic anal pain: local causes, functional
anorectal pain, and neuropathic pain syndromes. Conditions covered within these categories include proctalgia
fugax, levator ani syndrome, pudendal neuralgia, and coccygodynia. The signs, symptoms, relevant diagnostic tests,
and main treatments for each condition are reviewed.

Low back pain typically defined as pain below the costal margin and above the inferior gluteal folds with or without leg pain 1 is worldwide the most prevalent and most disabling of the conditions that are considered to benefit from rehabilitation 2 In a systematic review that included 165 studies from 54 countries the mean point prevalence of low back pain in the general adult population was approximately 12 with a higher prevalence among persons 40 years of age or older and among women the lifetime prevalence was approximately 40 3 Low back pain is classified as specific pain and other symptoms that are caused by specific pathophysiological mechanisms of nonspinal or spinal origin or nonspecific back pain with or without leg pain without a clear nociceptive-specific cause 4 Nonspinal causes of specific low back pain include hip conditions diseases of the pelvic organs e g prostatitis and endometriosis and vascular e g aortic aneurysm or systemic disorders spinal causes include herniated disk spinal stenosis fracture tumor infection and axial spondyloarthritis Lumbar disorders with radicular pain due to nerve-root involvement have a higher prevalence 5 to 10 than other spinal causes the two most frequent causes of such back pain are herniated disk and spinal stenosis 5 The overall prevalence of the other spinal disorders is low among patients with acute low back pain For example among 1172 patients who presented to primary care clinicians in Australia with acute low back pain only 11 0 9 were found to have serious spinal conditions mostly fractures during 1 year of follow-up 6 The authors of a Dutch study that involved primary care patients reported axial spondyloarthritis in almost one quarter of adults 20 to 45 years of age who presented with chronic low back pain 7 although these findings have not been replicated In contrast to low back pain caused by specific identifiable causes nonspecific low back pain probably develops from the interaction of biologic psychological and social factors 4 and it accounts for approximately 80 to 90 of all cases of low back pain 1 Low back pain is usually classified according to pain duration as acute 6 weeks subacute 6 to 12 weeks or chronic 12 weeks